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Filter Total Items: 365
Water being released into a recharge pond, Yucca Valley, California
Date Published: November 28, 2018
Status: Active

Warren Subbasin Groundwater Recharge

The Hi Desert Water District (HDWD) provides water service to about 10,000 customers in the areas of Yucca Valley, Yucca Mesa, and some unincorporated areas of San Bernardino County. The study area is the 19 square mile Warren subbasin of the Morongo groundwater basin (approximately 100 miles east of Los Angeles, California).

Green pan used for gold mining with a small amount of mercury in it
Date Published: November 28, 2018
Status: Active

Mercury

Mercury is a rare, dense metal, slightly more common than gold in the earth's crust. Mercury occurs in several different forms, the most important of which is methylmercury. Methylmercury is the form most readily incorporated into biological tissues and most toxic to humans. Methylmercury accumulates and biomagnifies in the food chain, reaching highest concentrations in predatory fish such as...

Map of California showing locations where hydrologic models using MODFLOW
Date Published: November 28, 2018
Status: Completed

Estimating Groundwater Withdrawals and Consumptive Use for Principal Aquifers

The USGS works in cooperation with local, State, and Federal agencies to compile and disseminate data on the Nation's water use. The annual water-use estimates are reported at the county, State, and national levels and provide fundamental input to regional hydrologic models. These estimates commonly represent the largest stresses in most aquifers and are needed by local managers to steward the...

Diagram showing hypothesized changes in GHG emission pathways due to winter flooding of corn fields.
Date Published: November 28, 2018
Status: Completed

Assessing the role of winter flooding on baseline greenhouse gas fluxes from corn fields in the Sacramento – San Joaquin Bay Delta

Understanding the magnitude and variability of baseline greenhouse gas (GHG) emissions from the Sacramento – San Joaquin Bay Delta is critical for current and future land management. For example, strategies that maximize carbon sequestration in soils and plants while minimizing unintended consequences such as GHG emissions are likely to produce both economic and environmental benefits for the...

Contacts: Brian Pellerin
Map showing sampling site locations in the Yolo Bypass
Date Published: November 27, 2018
Status: Active

Pesticide Occurrence in California – Yolo Bypass Pesticide Analyses

The project is part of an overarching Interagency Ecological Program (IEP)/Department of Water Resources (DWR) study that is focused on understanding the processes by which the Yolo Bypass may provide a fall food web supply for the Cache Slough Complex and downstream regions of the Sacramento/San Joaquin Delta.  Several studies conducted since 2011 have shown that phytoplankton blooms can be...

Contacts: James Orlando
Map of study area, including 5 river basins and 6 reservoirs in the southern Sierra Nevada
Date Published: November 27, 2018
Status: Active

Effects of Climate on Snowmelt and Water Availability for Reservoirs in the Southern Sierra Nevada

Potential changes in air temperature and precipitation due to changes in climate may result in more variable or smaller snow packs and earlier snowmelt in the southern Sierra Nevada in upcoming years. These conditions are likely to result in increased difficulty in planning reservoir operations for hydroelectric power and water availability during springtime snowmelt in this region. Reservoir...

USGS
Date Published: November 26, 2018
Status: Completed

Methylmercury cycling and export from agricultural and natural wetlands in the Yolo Bypass

The purpose of the work conducted by the USGS California Water Science Center is to help guide Yolo Wildlife Area management practices by identifying the relationships between management effects on dissolved organic matter properties and the resulting role of dissolved organic matter in mercury methylation and biotic uptake measured by the cooperating USGS scientists. The information gathered...

Contacts: Jacob A Fleck
Detailed map of the study area
Date Published: November 26, 2018
Status: Completed

Assessing the Feasibility of Artificial Recharge and Storage and the Effectiveness and Sustainability of Insitu Arsenic Removal in the North Buttes Area, Antelope Valley, California

Groundwater pumpage for agricultural and municipal supply has resulted in water-level declines of more than 200 ft in some parts of the Antelope Valley groundwater basin and land subsidence of more than 6 ft in some areas. Future urban growth, increased agricultural demand, and limits on the supply of imported water will continue to increase the demand for groundwater.

Contacts: Tracy Nishikawa
Map of the Sacramento-San Joaquin Delta
Date Published: November 26, 2018
Status: Completed

Investigation of Linkages Between Management Practices Used in Sacramento-San Joaquin Delta Rice Production and Loads of Dissolved Organic Matter and Disinfection Byproduct Precursors

The primary objective of this study is to expand our current understanding of how to manage rice production in the Sacramento-San Joaquin Delta in a manner that minimizes loads of water quality contaminants to Delta waters.

Contacts: Jacob A Fleck
Detailed map of study area
Date Published: November 26, 2018
Status: Completed

The effects of artificially recharging treated municipal wastewater on ground-water levels and quality, Antelope Valley, California

Study Area Location.

Ground-water pumpage for agricultural and municipal supply has resulted in water-level declines of more than 200 ft in some parts of the Antelope Valley ground-water basin and land subsidence of more than 6 ft in some areas. Future urban growth, increased agricultural demand, and limits on the supply of imported water will continue to increase the demand for ground...

Contacts: Claudia C Faunt
USGS
Date Published: November 26, 2018
Status: Completed

Geohydrology of the Big Bear Valley

The study develops a greater understanding of the hydrology of the Big Bear Valley ground-water basin and allows the Big Bear Valley Community Services District to better manage and utilize the resource. The study will address the effects of urbanization and suburbanization on water resources and the effects of climate on water resources, issues 1 and 7 from the Strategic Directions for the...

Detailed Map of Study Area.
Date Published: November 26, 2018
Status: Completed

Central Basin Groundwater Contamination Study

The Central and West Coast groundwater basins provide nearly a third of the water supply to 43 cities in southern Los Angeles County. Over 250,000 afy are pumped from the basins for municipal and industrial use. To properly manage the ground-water resource and to ensure its future availability, it is necessary to identify and manage threats to the drinking water aquifers from surface...

Contacts: Michael T Land
Filter Total Items: 352
screenshot of an interactive map of groundwater data in the Mojave region.  Well sites and water-level contours are displayed.
December 18, 2018

Interactive map of the Mojave and Morongo groundwater basins.  Data layers include sites and data for groundwater levels, water quality, and land subsidence.  Groundwater data spans 1992 to the present.

screenshot of the current streamflow conditions map, showing streamgage sites colored by percent to normal
December 18, 2018

Careful observation and analysis of the movement and condition of surface water is essential for understanding this resource, especially during times of drought. The California Water Science Center uses a network of more than 500 streamgages to collect real-time data on surface water at locations across the state.

screenshot of interactive data map displaying  USGS wells in the San Antonio Creek groundwater basin
December 18, 2018

In order to understand the integrated hydrologic systems in the San Antonio Creek Valley, many different types of data are being gathered from both the surface water and groundwater system. Learn about these data types and explore them with the interactive map.

Screenshot of the interactive Central Valley drought indicators map
December 17, 2018

During the recent droughts of 2007-2010 and 2012-2017, groundwater pumping has increased from the combined effects of the drought and land-use changes, re-initiating land subsidence. In order to document historical subsidence and monitor continued changes, the USGS has gathered and interpreted data from a variety of sources.

A geodetic bench mark from the Central Valley in California
December 17, 2018

These 5 northern benchmarks in the San Joaquin Valley are where the largest magnitude of subsidence was recently measured using repeat surveys. That doesn't mean these locations are where the largest magnitude of subsidence occurred, just where it's been measured. The southernmost benchmark in this set is where the largest magnitude was historically measured using repeat surveys.

A green and yellow USGS extensometer installed in a shed
December 17, 2018

Aquifer-system compaction has been monitored at selected locations for various periods with borehole extensometers by different agencies, including the USGS, DWR, SLDMWA, and CCID, and by Luhdorff and Scalmanini Consulting Engineers.  This dataset contains compaction data for 23 extensometers across California's Central Valley.

continuous GPS mounted on a tripod, located in a field, with a solar panel in the background
December 17, 2018

The CGPS data were obtained from the UNAVCO Plate Boundary Observatory (PBO) network of continuously operating GPS stations. The PBO is the geodetic component of UNAVCO, a consortium of research institutions whose focus is measuring vertical and horizontal plate boundary deformation across the North American and Pacific Plates in the western U.S. using high-precision measurement techniques.

sample interferogram displaying multiple colors representing different magnitudes of land subsidence or uplift
December 17, 2018

The InSAR technique uses two SAR scenes of the same area taken at different times which are then processed together to produce maps called interferograms that show relative land-surface-elevation change between the two SAR acquisition dates. This Areas of Interest dataset is where InSAR data has been interpreted to produce a time-history of subsidence in the Central Valley, CA.

Depth to water level (2002-2018) for a well in San Bernardino County, CA
December 14, 2018

List of USGS sites in San Bernardino County, CA that have water quality data samples.  Data is on the USGS National Water Information System database.

Depth to water level (2002-2018) for a well in San Bernardino County, CA
December 14, 2018

Links to real-time groundwater and surface water data for USGS sites in San Bernardino County.  All data links are to the USGS National Water Information System online database.

screenshot of interactive map displaying groundwater, water quality, streamgage, and microgravity sites
December 13, 2018

The Lower Colorado Monitoring Network, located along the All-American Canal in Imperial County, California, is a series of groundwater-level and water-quality wells, as well as streamgages and micro-gravity sites. This interactive map displays the sites and provides links to the most current data.

Filter Total Items: 319
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Year Published: 2012

FOP 2012 stop, Honey Lake fault, Doyle, CA

The Honey Lake fault system (HLFS) strikes north-northwestward across Long Valley near Doyle, CA and is part of a network of active, dextral strike-slip faults in the northern Walker Lane (Figure 1). Geologic investigations of a right-laterally offset terrace riser along the north bank of Long Valley Creek, which we refer to as site 1 (Figure 2),...

Seitz, Gordon G.; Gold, Ryan; Briggs, Richard W.; Crone, Anthony; Angster, Steve
FOP 2012 stop, Honey Lake fault, Doyle, CA; 2012; Article; Book; Guidebook: neotectonics of the Lake Tahoe and Carson and Sierra Valleys, F.O.P. 2012 - Sept. 13-16: friends of the Pleistocene Pacific cell meeting; Gold, Ryan; Briggs, Richard ; Crone, Anthony ; Angster, Steve

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Year Published: 2012

Grizzly Valley fault system, Sierra Valley, CA

The Grizzly Valley fault system (GVFS) strikes northwestward across Sierra Valley, California and is part of a network of active, dextral strike-slip faults in the northern Walker Lane (Figure 1). To investigate Quaternary motion across the GVFS, we analyzed high-resolution (0.25 m) airborne LiDAR data (Figure 2) in combination with six, high-...

Gold, Ryan; Stephenson, William; Odum, Jack; Briggs, Rich; Crone, Anthony; Angster, Steve
FOP 2012 stop, Grizzly Valley fault system, Sierra Valley, CA; 2012; Article; Book; Guidebook: neotectonics of the Lake Tahoe and Carson and Sierra Valleys, F.O.P. 2012 - Sept. 13-16: friends of the Pleistocene Pacific cell meeting; Gold, Ryan; Stephenson, William ; Odum, Jack ; Briggs, Rich ; Crone, Anthony ; Angster, Steve

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Year Published: 2012

Probabilistic Relationships between Ground‐Motion Parameters and Modified Mercalli Intensity in California

We use a database of approximately 200,000 modified Mercalli intensity (MMI) observations of California earthquakes collected from USGS "Did You Feel It?" (DYFI) reports, along with a comparable number of peak ground-motion amplitudes from California seismic networks, to develop probabilistic relationships between MMI and peak ground velocity (PGV...

Worden, C.B.; Wald, David J.; Rhoades, D.A.
Probabilistic Relationships between Ground‐Motion Parameters and Modified Mercalli Intensity in California; 2012; Article; Journal; Bulletin of the Seismological Society of America; Worden, C.B.; Wald, David J.; Rhoades, D.A

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Year Published: 2011

Assessment of topographic and drainage network controls on debris-flow travel distance along the west coast of the United States

To better understand controls on debris-flow entrainment and travel distance, we examined topographic and drainage network characteristics of initiation locations in two separate debris-flow prone areas located 700 km apart along the west coast of the U.S. One area was located in northern California, the other in southern Oregon. In both areas,...

Coe, Jeffrey A.; Reid, Mark E.; Brien, Dainne L.; Michael, John A.
Assessment of topographic and drainage network controls on debris-flow travel distance along the west coast of the United States; 2011; Article; Journal; Italian Journal of Engineering Geology and Environment; 5th International Conference on Debris-Flow Hazards "Mitigation, Mechanics, Prediction and Assessment"; Coe, Jeffrey A.; Reid, Mark E.; Brien, Dainne L.; Michael, John A.

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Year Published: 2011

Assessing possible visitor-use impacts on water quality in Yosemite National Park, California

There is concern that visitor-use associated activities, such as bathing, dish washing, wastewater production, and stock animal use near lakes and streams, could cause degradation of water quality in Yosemite National Park. A study was conducted during 2004–2007 to assess patterns in nutrient and Escherichia coli (E. coli) concentrations in...

Clow, David W.; Peavler, Rachael S.; Roche, Jim; Panorska, Anna K.; Thomas, James M.; Smith, Steve
Assessing possible visitor-use impacts on water quality in Yosemite National Park, California; 2011; Article; Journal; Environmental Monitoring and Assessment; Clow, David W.; Peavler, Rachael S.; Roche, Jim ; Panorska, Anna K.; Thomas, James M.; Smith, Steve

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Year Published: 2011

Emergency assessment of postwildfire debris-flow hazards for the 2011 Motor Fire, Sierra and Stanislaus National Forests, California

This report presents an emergency assessment of potential debris-flow hazards from basins burned by the 2011 Motor fire in the Sierra and Stanislaus National Forests, Calif. Statistical-empirical models are used to estimate the probability and volume of debris flows that may be produced from burned drainage basins as a function of different...

Cannon, Susan H.; Michael, John A.
Emergency assessment of postwildfire debris-flow hazards for the 2011 Motor Fire, Sierra and Stanislaus National Forests, California; 2011; OFR; 2011-1251; Cannon, Susan H.; Michael, John A.

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Year Published: 2011

Relative abundance and distribution of fishes within an established Area of Critical Environmental Concern, of the Amargosa River Canyon and Willow Creek, Inyo and San Bernardino Counties, California

The Amargosa River Canyon of San Bernardino and Inyo County, California, has been designated by the Bureau of Land Management as an Area of Critical Environmental Concern, due in part to its unique flora and fauna. As a task of the Area of Critical Environmental Concern implementation plan, a survey of native fishes was conducted from June 21 to...

Scoppettone, G. Gary; Hereford, Mark E.; Rissler, Peter H.; Johnson, Danielle M.; Salgado, Antonio
Relative abundance and distribution of fishes within an established Area of Critical Environmental Concern, of the Amargosa River Canyon and Willow Creek, Inyo and San Bernardino Counties, California; 2011; OFR; 2011-1161; Scoppettone, G. Gary; Hereford, Mark E.; Rissler, Peter H.; Johnson, Danielle M.; Salgado, Antonio

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Year Published: 2011

Overview of the ARkStorm scenario

The U.S. Geological Survey, Multi Hazards Demonstration Project (MHDP) uses hazards science to improve resiliency of communities to natural disasters including earthquakes, tsunamis, wildfires, landslides, floods and coastal erosion. The project engages emergency planners, businesses, universities, government agencies, and others in preparing for...

Porter, Keith; Wein, Anne; Alpers, Charles N.; Baez, Allan; Barnard, Patrick L.; Carter, James; Corsi, Alessandra; Costner, James; Cox, Dale; Das, Tapash; Dettinger, Mike; Done, James; Eadie, Charles; Eymann, Marcia; Ferris, Justin; Gunturi, Prasad; Hughes, Mimi; Jarrett, Robert; Johnson, Laurie; Le-Griffin, Hanh Dam; Mitchell, David; Morman, Suzette; Neiman, Paul; Olsen, Anna; Perry, Suzanne; Plumlee, Geoffrey; Ralph, Martin; Reynolds, David; Rose, Adam; Schaefer, Kathleen; Serakos, Julie; Siembieda, William; Stock, Jonathan; Strong, David; Wing, Ian Sue; Tang, Alex; Thomas, Pete; Topping, Ken; Wills, Chris; Jones, Lucile
Overview of the ARkStorm scenario; 2011; OFR; 2010-1312; Porter, Keith; Wein, Anne; Alpers, Charles; Baez, Allan; Barnard, Patrick; Carter, James; Corsi, Alessandra; Costner, James; Cox, Dale; Das, Tapash; Dettinger, Michael; Done, James; Eadie, Charles; Eymann, Marcia; Ferris, Justin; Gunturi, Prasad; Hughes, Mimi; Jarrett, Robert; Johnson, Laurie; Le-Griffin, Hanh Dam; Mitchell, David; Morman, Suzette; Neiman, Paul; Olsen, Anna; Perry, Suzanne; Plumlee, Geoffrey; Ralph, Martin; Reynolds, David; Rose, Adam; Schaefer, Kathleen; Serakos, Julie; Siembieda, William; Stock, Jonathan; Strong, David; Wing, Ian Sue; Tang, Alex; Thomas, Pete; Topping, Ken; Wills, Chris; Jones, Lucile

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Year Published: 2011

Soil-geomorphic significance of land surface characteristics in an arid mountain range, Mojave Desert, USA

Mountains comprise an extensive and visually prominent portion of the landscape in the Mojave Desert, California. Landform surface properties influence the role these mountains have in geomorphic processes such as dust flux and surface hydrology across the region. The primary goal of this study was to describe and quantify land surface properties...

Hirmas, D.R.; Graham, R.C.; Kendrick, K.J.
Soil-geomorphic significance of land surface characteristics in an arid mountain range, Mojave Desert, USA; 2011; Article; Journal; Catena; Hirmas, D. R.; Graham, R. C.; Kendrick, K. J.

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Year Published: 2011

Unusual dominance by desert pupfish (Cyprinodon macularius) in experimental ponds within the Salton Sea Basin

In October 2006, months after shallow experimental ponds in the Salton Sea Basin were filled with water from the Alamo River and Salton Sea, fish were observed in several ponds, although inlets had been screened to exclude fish. During October 2007November 2009, nine surveys were conducted using baited minnow traps to document species and relative...

Saiki, Michael K.; Martin, Barbara A.; Anderson, Thomas W.
Unusual dominance by desert pupfish (Cyprinodon macularius) in experimental ponds within the Salton Sea Basin; 2011; Article; Journal; Southwestern Naturalist; Saiki, Michael K.; Martin, Barbara A.; Anderson, Thomas W.

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Year Published: 2010

Correction to “Constraints on the stress state of the San Andreas Fault with analysis based on core and cuttings from San Andreas Fault Observatory at Depth (SAFOD) drilling phases 1 and 2”

This article corrects: Constraints on the stress state of the San Andreas Fault with analysis based on core and cuttings from San Andreas Fault Observatory at Depth (SAFOD) drilling phases 1 and 2. Vol. 114, Issue B11, Article first published online: 5 NOV 2009.

Tembe, Sheryl; Lockner, David; Wong, Teng-Fong
Correction to “Constraints on the stress state of the San Andreas Fault with analysis based on core and cuttings from San Andreas Fault Observatory at Depth (SAFOD) drilling phases 1 and 2”; 2010; Article; Journal; Journal of Geophysical Research: Solid Earth; Tembe, Sheryl ; Lockner, David ; Wong, Teng-fong

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Year Published: 2010

Evaluation of geodetic and geologic datasets in the Northern Walker Lane-Summary and recommendations of the Workshop

The Northern Walker Lane comprises a complex network of active faults in northwestern Nevada and northeastern California bound on the west by the Sierra Nevada and on the east by the extensional Basin and Range Province. Because deformation is distributed across sets of discontinuous faults, it is particularly challenging to integrate geologic and...

Briggs, Richard W.; Hammond, William C.
Evaluation of geodetic and geologic datasets in the Northern Walker Lane-Summary and recommendations of the Workshop; 2010; OFR; 2011-1282; Briggs, Richard W.; Hammond, William C.

Filter Total Items: 1,158
Web browser screen showing an application with different parameters and controls on left and the resulting map on right.
December 31, 2018

Screenshot of Our Coast, Our Future

Screenshot of Our Coast, Our Future (OCOF) interactive map view of Stinson Beach, California, showing extent of flooding predicted if subjected to a sea-level rise of 100 centimeters (about 40 inches) and elevated water levels caused by a 100-year storm.

Juvenile salt marsh harvest mouse
December 31, 2018

Juvenile Salt Marsh Harvest Mouse (Reithrodontomys raviventris)

USGS wildlife biologists holding a juvenile salt marsh harvest mouse (Reithrodontomys raviventris). The species is listed as "endangered" under the Endangered Species Act of 1973.

A pole has two shaded cameras mounted on it and they are pointing at a beach from high up on a grassy bluff.
December 31, 2018

Sunset State Beach webcams

USGS Pacific Coastal and Marine Science Center in Santa Cruz, California installed these video cameras which collect imagery every half hour for 10 minutes. The images are stored in the cloud and are used to study coastal variations through time, like wave, shoreline, and sandbar dynamics.

Lineations on a vertical strand of the Soda-Avawatz Fault Zone exposed in Northern Soda Mountains, California.
December 17, 2018

Lineations on a strand of the Soda-Avawatz Fault Zone northern Soda Mt

Lineations on a vertical fault strand of the Soda-Avawatz Fault Zone, exposed in the northern Soda Mountains, Mojave Desert, southern California. The fault can be seen cutting both late Tertiary sand and gravel units, but is buried by an overlying mid-Pleistocene alluvial gravel deposit.

December 17, 2018

Burrowing Owl Regurgitating a Pellet

A burrowing owl regurgitates an owl pellet at the LAX Dunes Preserve caught by a wildlife camera.
 

November 29, 2018

PubTalk 11/2018 - California Birds

Title: The Least Bell's Vireo - A flagship species for riparian ecosystem conservation

The Least Bell's Vireo (Vireo bellii pusillus) is a songbird that is endangered in California:

  • What type of research is the USGS doing to help understand the threats these and other birds face?
  • How has our research during the last 30 years
...
Researcher in Mojave Desert
November 29, 2018

Researcher in Mojave Desert

One of 1,695 repeat photographs taken to provide context for the classification of the Central Mojave Desert into various vegetation classes.

Snow falls on USGS Hydrologist, Joe Nawikas, as he collects groundwater samples in Mammoth, California.
November 28, 2018

Collecting Groundwater Samples in Mammoth, CA

Snow falls on USGS Hydrologist, Joe Nawikas, as he collects groundwater samples in Mammoth, California.

Scientist writing on clipboard, with small seismometer on the ground and mountains in the background
November 16, 2018

Collecting geophysics data at Pinnacles National Park

Research Hydrologist Paul Hsieh collects seismic data during a groundwater study at Pinnacles National Park in California. The red seismometer on the ground measures ambient seismic noise, which includes microtremors induced by wind, ocean waves, and human activity. The seismic data collected can be used to estimate unconsolidated sediment thickness, map the bedrock

...
Attribution: Water Resources
November 16, 2018

Image of the Week - California Wildfires

Satellites have captured views of the numerous major fires burning in California.

An image acquired on November 9, 2018, from NASA’s MODIS sensor on the Terra satellite shows smoke pouring out of two major fires, the Camp Fire and the Woolsey Fire, which both ignited the day before.

In the north, the Camp Fire quickly became the deadliest wildfire in the

...
Image from an application that navigates users through USGS National Oil and Gas Assessment Provinces
November 14, 2018

National Oil and Gas Assessment Provinces

This is a graphic from the USGS National Oil and Gas Assessment Explorer application, which allows user to drill into 70 oil and gas assessment provinces throughout the United States.

Dark image of a coastal area shows standard deviation of pixel density for 10 minutes, brighter areas mean more movement.
November 8, 2018

Sunset State Beach variance image

Image from video camera along Sunset State Beach in Watsonville, CA, looking northwest. Every half hour during daylight hours, the camera shoots video for 10 minutes. This variance image shows the standard deviation of pixel intensity throughout the video frames, useful for determining how much variation or movement is occurring at a given location. Brighter tones indicate

...
Filter Total Items: 912
still waters reflecting image of grasses growing next to it, with bright blue sky.
November 15, 2016

Successfully resolving California’s long-standing water supply and ecosystem restoration conflicts in the Delta requires developing sound policy solutions based on data derived from the best available science.

still waters reflecting image of grasses growing next to it, with bright blue sky.
November 9, 2016

Scientists, engineers and resource managers meet in Sacramento to explore the theme of “Science for Solutions: Linking Data and Decisions” at the 9th Biennial Bay-Delta Science Conference.

USGS
November 1, 2016

A new study from the USGS suggests that some early 20th century earthquakes in southern California might have been induced (man-made) by past practices that were used by the oil and gas industry.

a picture of a flooded road in San Diego, CA
October 27, 2016

This week is California Flood Preparedness week, and local, state, and federal agencies are reminding Californians to be aware and be prepared for potential potential flooding hazards as we enter the rainy season.

Two side-by-side (before, 2002 & after) aerial photos of the same cliff by the beach. Photo on right from 2010 shows landslide.
October 21, 2016

U.S. Geological Survey scientists and their coauthors from the California Coastal Records Project have found a way to use historical aerial photographs not just to see evidence of coastal erosion, but to accurately measure how much has occurred over time.

Filter Total Items: 219