California State Route 178, showing cracks due to fault offsets following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.
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Earthquake Damage on California Hwy. 178
California State Route 178, showing cracks due to fault offsets following the Magnitude 6.4 earthquake that struck Searles Valley on July 4, 2019.
Surface Rupture from Fault
On July 4, 2019, a Magnitude 6.4 earthquake struck Searles Valley, CA. This photo provides likely evidence that the fault that hosted the earthquake ruptured to the ground surface.
On July 4, 2019, a Magnitude 6.4 earthquake struck Searles Valley, CA. This photo provides likely evidence that the fault that hosted the earthquake ruptured to the ground surface.
Surface Rupture from Fault
On July 4, 2019, a Magnitude 6.4 earthquake struck Searles Valley, CA. This photo provides likely evidence that the fault that hosted the earthquake ruptured to the ground surface.
On July 4, 2019, a Magnitude 6.4 earthquake struck Searles Valley, CA. This photo provides likely evidence that the fault that hosted the earthquake ruptured to the ground surface.
Moletrack crossing China Lake dry lake bed
Moletrack crossing China Lake dry lake bed after Ridgecrest earthquake in July of 2019.
Moletrack crossing China Lake dry lake bed after Ridgecrest earthquake in July of 2019.
Ridgecrest Earthquake - Documenting Ruptures
Belle Philibosian working with Gordon Seitz (CGS) and Stephan Bock (NAWS) to document surface ruptures of the M7.1 Ridgecrest earthquake, July 2019.
Belle Philibosian working with Gordon Seitz (CGS) and Stephan Bock (NAWS) to document surface ruptures of the M7.1 Ridgecrest earthquake, July 2019.
Palu Earthquake Damage to House from Liquefaction
House destroyed by Palu earthquake-induced liquefaction. Note standing water which indicates a nearly surface-level water table that contributed to the widespread liquefaction.
House destroyed by Palu earthquake-induced liquefaction. Note standing water which indicates a nearly surface-level water table that contributed to the widespread liquefaction.
3DEP, Lidar point cloud, Pre-Hurricane Maria
Figure 2: Zooming in to red rectangle A from figure 1. Points colored by laser intensity (blue = low intensity, red = high intensity).
Figure 2: Zooming in to red rectangle A from figure 1. Points colored by laser intensity (blue = low intensity, red = high intensity).
The Bay Bridge and the Oakland city skyline
The nighttime Oakland city skyline as seen from San Francisco with the Bay Bridge in the foreground
The nighttime Oakland city skyline as seen from San Francisco with the Bay Bridge in the foreground
ShakeAlert sensor station being serviced by USGS personnel
A USGS electronics technician performs maintenance on a ShakeAlert Earthquake Early Warning (EEW) sensor station, located in the San Francisco Bay Area. ShakeAlert station components include strong-motion accelerometers, solar panel and battery power systems, and communications & telemetry equipment for communication with the wider ShakeAlert network.
A USGS electronics technician performs maintenance on a ShakeAlert Earthquake Early Warning (EEW) sensor station, located in the San Francisco Bay Area. ShakeAlert station components include strong-motion accelerometers, solar panel and battery power systems, and communications & telemetry equipment for communication with the wider ShakeAlert network.
Coral cores like this one reveal geologic history of Keys reefs
USGS Research Oceanographer Lauren Toth and Oceanographer Anastasios Stathakopoulos study a coral-reef core in the USGS’s Core Archive in St. Petersburg, Florida. Photo: Dominique Gallery, USGS.
USGS Research Oceanographer Lauren Toth and Oceanographer Anastasios Stathakopoulos study a coral-reef core in the USGS’s Core Archive in St. Petersburg, Florida. Photo: Dominique Gallery, USGS.
Erosion has taken a toll on this Keys coral
A reef in the Florida Keys National Marine Sanctuary with little living coral and extensive bioerosion. Photo taken under research permit number FKNMS-2016-085-A1. Credit: USGS, Ilsa Kuffner.
A reef in the Florida Keys National Marine Sanctuary with little living coral and extensive bioerosion. Photo taken under research permit number FKNMS-2016-085-A1. Credit: USGS, Ilsa Kuffner.
The Bay Bridge and the Oakland city skyline
The nighttime Oakland city skyline as seen from San Francisco with the Bay Bridge in the foreground
The nighttime Oakland city skyline as seen from San Francisco with the Bay Bridge in the foreground
Like many Keys corals, this one has no new growth
A modern coral reef in Dry Tortugas National Park. There is little living coral and high rates of bioerosion. Photo taken under research permit number DRTO-2018-SCI-0005. Credit: Lauren Toth, USGS
A modern coral reef in Dry Tortugas National Park. There is little living coral and high rates of bioerosion. Photo taken under research permit number DRTO-2018-SCI-0005. Credit: Lauren Toth, USGS
Trench Across West Napa Fault, California
Belle Philibosian in a trench investigating the West Napa Fault near St. Helena, California, August 2017.
Belle Philibosian in a trench investigating the West Napa Fault near St. Helena, California, August 2017.
Earthquake Alerts: Early and Often? Or Possibly Late?
The choice when issuing earthquake warnings is to: 1) issue alerts for weak shaking and potentially provide long warning times, but risk sending alerts for the many events that do not go on to produce damaging ground shaking, or 2) issue alerts only when ground shaking is expected to be damaging, with the tradeoff that the alert will be sent much later, reducing
The choice when issuing earthquake warnings is to: 1) issue alerts for weak shaking and potentially provide long warning times, but risk sending alerts for the many events that do not go on to produce damaging ground shaking, or 2) issue alerts only when ground shaking is expected to be damaging, with the tradeoff that the alert will be sent much later, reducing
Montecito after debris flow
The Dec. 4, 2017 Thomas fire, Southern California's largest wildfire on record, burned more than 280,000 acres across Ventura and Santa Barbara counties for nearly a month.
The Dec. 4, 2017 Thomas fire, Southern California's largest wildfire on record, burned more than 280,000 acres across Ventura and Santa Barbara counties for nearly a month.
Geologists assess scene after debris flow
Geologists assess boulders displaced during the Montecito debris flow event on Jan. 9, 2018.
Geologists assess boulders displaced during the Montecito debris flow event on Jan. 9, 2018.
Pool sign warns first responders
Swimming pool sign spray-painted to warn first responders and others to be careful around the potentially dangerous area.
Swimming pool sign spray-painted to warn first responders and others to be careful around the potentially dangerous area.
Geologists assess damage after debris-flow event
USGS geologists deployed to Santa Barbara County to support a geohazard assessment of the Montecito area
USGS geologists deployed to Santa Barbara County to support a geohazard assessment of the Montecito area
California Seismicity
Map of historic seismicity, major faults, and paleoseismic summary of San Andreas Fault system.
Map of historic seismicity, major faults, and paleoseismic summary of San Andreas Fault system.
Teton Fault
Mark, Nicole, Rich, Ryan, Dean taking out the "trash" from the base of the trench.
Mark, Nicole, Rich, Ryan, Dean taking out the "trash" from the base of the trench.