On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. It was a tragic reminder of the destructive power of earthquakes. However, it was also a watershed moment in seismic research. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. And studied it. These are their stories.
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October 17, 1989 (Part 4)
On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. It was a tragic reminder of the destructive power of earthquakes. However, it was also a watershed moment in seismic research. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. And studied it. These are their stories.
PubTalk 10/2019 — Remembering Loma Prieta Earthquake 30 Years Later
PubTalk 10/2019 — Remembering Loma Prieta Earthquake 30 Years LaterRemembering the Loma Prieta Earthquake 30 Years Late: Looking back to see how far we've come.
By: Tom Holzer, David Schwartz, Jessica Murray, and Annemarie Baltay
PubTalk 10/2019 — Remembering Loma Prieta Earthquake 30 Years Later
PubTalk 10/2019 — Remembering Loma Prieta Earthquake 30 Years LaterRemembering the Loma Prieta Earthquake 30 Years Late: Looking back to see how far we've come.
By: Tom Holzer, David Schwartz, Jessica Murray, and Annemarie Baltay
The Ben Franklin Bridge over the Delaware River.
The Ben Franklin Bridge stretches over the Delaware River. The Delaware River Basin provides water to big cities such as New York and Philadelphia.
The Ben Franklin Bridge stretches over the Delaware River. The Delaware River Basin provides water to big cities such as New York and Philadelphia.
USGS scientists collect gas from the Puhimau thermal area on Chain of Craters Ro
USGS scientists collect gas from the Puhimau thermal area on Chain of Craters RoUSGS scientists collect gas from the Puhimau thermal area on Chain of Craters Road in Hawai‘i Volcanoes National Park. The gas is collected in evacuated (vacuum-pumped so that no gas at all is inside) glass bottles, and a system of a syringe with tubing helped ensure minimal contamination by ambient atmospheric gases.
USGS scientists collect gas from the Puhimau thermal area on Chain of Craters Ro
USGS scientists collect gas from the Puhimau thermal area on Chain of Craters RoUSGS scientists collect gas from the Puhimau thermal area on Chain of Craters Road in Hawai‘i Volcanoes National Park. The gas is collected in evacuated (vacuum-pumped so that no gas at all is inside) glass bottles, and a system of a syringe with tubing helped ensure minimal contamination by ambient atmospheric gases.
USGS scientists collect gas from the Puhimau thermal area on Chain of Craters Ro
USGS scientists collect gas from the Puhimau thermal area on Chain of Craters RoUSGS scientists collect gas from the Puhimau thermal area on Chain of Craters Road in Hawai‘i Volcanoes National Park. The gas is collected in evacuated (vacuum-pumped so that no gas at all is inside) glass bottles, and a system of a syringe with tubing helped ensure minimal contamination by ambient atmospheric gases.
USGS scientists collect gas from the Puhimau thermal area on Chain of Craters Ro
USGS scientists collect gas from the Puhimau thermal area on Chain of Craters RoUSGS scientists collect gas from the Puhimau thermal area on Chain of Craters Road in Hawai‘i Volcanoes National Park. The gas is collected in evacuated (vacuum-pumped so that no gas at all is inside) glass bottles, and a system of a syringe with tubing helped ensure minimal contamination by ambient atmospheric gases.
Adult Pacific salmon caught in impounded water above beaver dam
Adult Pacific salmon caught in impounded water above beaver damAdult Pacific salmon (Oncorhynchus nerka) caught in impounded water above beaver dam. >25 rKM (river KM) from coast.
Adult Pacific salmon caught in impounded water above beaver dam
Adult Pacific salmon caught in impounded water above beaver damAdult Pacific salmon (Oncorhynchus nerka) caught in impounded water above beaver dam. >25 rKM (river KM) from coast.
Autumn, South Fork Coeur d'Alene River, Idaho
U.S. Geological Survey hydrologic technician Mike Michelotti measures streamflow on the South Fork Coeur d'Alene River at Elizabeth Park near Kellogg, Idaho, October 9, 2019. The USGS operates streamgage station 12413210 in cooperation with the U.S. Environmental Protection Agency.
U.S. Geological Survey hydrologic technician Mike Michelotti measures streamflow on the South Fork Coeur d'Alene River at Elizabeth Park near Kellogg, Idaho, October 9, 2019. The USGS operates streamgage station 12413210 in cooperation with the U.S. Environmental Protection Agency.
Mike Michelotti is making a winter stream flow measurement
Mike Michelotti is making a winter stream flow measurementMike Michelotti is making a winter stream flow measurement using a flow tracker at stream gage 12413210 South Fork Coeur D' Alene River at Elizabeth Park near Kellogg, ID.
Mike Michelotti is making a winter stream flow measurement
Mike Michelotti is making a winter stream flow measurementMike Michelotti is making a winter stream flow measurement using a flow tracker at stream gage 12413210 South Fork Coeur D' Alene River at Elizabeth Park near Kellogg, ID.
Niagara River Water Quality Sample 2019
USGS staffer Matthew Jennings collecting water quality samples on the lower Niagara River for the Great Lakes Restoration Initiative (GLRI) project. Photo by John Wernly (Public domain)
USGS staffer Matthew Jennings collecting water quality samples on the lower Niagara River for the Great Lakes Restoration Initiative (GLRI) project. Photo by John Wernly (Public domain)
天然水循环, The Water Cycle, Chinese
什么是水循环？
什么是水循环？回答这个问题非常容易 ---水循环通常也被称为"水分循环"或"水文循环"，是指水在地球上、地球中以及地球上空的存在及运动情况。地球的水处于不停地运动中，并且不停地变换着存在形式，从液体变成水蒸气再变成冰，然后再循环往复。水循环已经持续了几十亿年，地球上的所有生命都依赖于水循环。如果没有水循环，地球将会是一个毫无生气的地方。
什么是水循环？
什么是水循环？回答这个问题非常容易 ---水循环通常也被称为"水分循环"或"水文循环"，是指水在地球上、地球中以及地球上空的存在及运动情况。地球的水处于不停地运动中，并且不停地变换着存在形式，从液体变成水蒸气再变成冰，然后再循环往复。水循环已经持续了几十亿年，地球上的所有生命都依赖于水循环。如果没有水循环，地球将会是一个毫无生气的地方。
El Ciclo Natural del Agua - The Natural Water Cycle, Spanish
El Ciclo Natural del Agua - The Natural Water Cycle, SpanishEl Ciclo del Agua
Puhimau thermal area has the largest naturally occurring population of the endan
Puhimau thermal area has the largest naturally occurring population of the endanPuhimau thermal area has the largest naturally occurring population of the endangered plant, Portulaca sclerocarpa (marked by the blue flag in the photo), and is the site of National Park Service restoration efforts for this species.
Puhimau thermal area has the largest naturally occurring population of the endan
Puhimau thermal area has the largest naturally occurring population of the endanPuhimau thermal area has the largest naturally occurring population of the endangered plant, Portulaca sclerocarpa (marked by the blue flag in the photo), and is the site of National Park Service restoration efforts for this species.
Sierra marten caught on camera
This Sierra Marten was caught on wildlife camera in October. The camera was set up to study animal movement under a new road crossing structure known as the “toad road” in Sierra National Forest. The Sierra marten (Martes caurina sierra) is a mammal in the weasel family about the size of a house cat.
This Sierra Marten was caught on wildlife camera in October. The camera was set up to study animal movement under a new road crossing structure known as the “toad road” in Sierra National Forest. The Sierra marten (Martes caurina sierra) is a mammal in the weasel family about the size of a house cat.
USGS stream gage 10242000 Coal Creek near Cedar City, Utah
USGS stream gage 10242000 Coal Creek near Cedar City, UtahFall time descends on Southwest Utah. The changing fall leaves coupled with blue skies and red rock backdrop make for a beautiful morning for a discharge measurement at the Coal Creek near Cedar City, Utah stream gage 10242000.
USGS stream gage 10242000 Coal Creek near Cedar City, Utah
USGS stream gage 10242000 Coal Creek near Cedar City, UtahFall time descends on Southwest Utah. The changing fall leaves coupled with blue skies and red rock backdrop make for a beautiful morning for a discharge measurement at the Coal Creek near Cedar City, Utah stream gage 10242000.
Boise River Watershed Watch, 2019
U.S. Geological Survey hydrologist Tyler King helps a citizen volunteer test a water sample for dissolved oxygen as part of the 2019 Watershed Watch in the lower Boise River watershed of southwestern Idaho. Watershed Watch is an annual citizen science event sponsored by the City of Boise. The USGS is an event co-sponsor.
U.S. Geological Survey hydrologist Tyler King helps a citizen volunteer test a water sample for dissolved oxygen as part of the 2019 Watershed Watch in the lower Boise River watershed of southwestern Idaho. Watershed Watch is an annual citizen science event sponsored by the City of Boise. The USGS is an event co-sponsor.
Removal of sediment-filled core liner
USGS scientists Brandon Nasr, Jenna Hill, Nora Nieminski, and Jenny McKee removing a sediment-filled core liner from the jumbo piston core barrel with the picturesque northern California coastline in the background.
USGS scientists Brandon Nasr, Jenna Hill, Nora Nieminski, and Jenny McKee removing a sediment-filled core liner from the jumbo piston core barrel with the picturesque northern California coastline in the background.
Chirp sub-bottom profiler ready for deployment
UCSC student Travis Alonghi and USGS scientist Danny Brothers deploying the Chirp sub-bottom profiler at sunset from M/V Bold Horizon.
UCSC student Travis Alonghi and USGS scientist Danny Brothers deploying the Chirp sub-bottom profiler at sunset from M/V Bold Horizon.
Cross Shore Array Deployment at the FRF
The USGS Coastal and Estuarine Dynamics Group will be deploying a cross shore array at Pea Island, various intruments will be connected to the poles to measure oceanographic conditions
The USGS Coastal and Estuarine Dynamics Group will be deploying a cross shore array at Pea Island, various intruments will be connected to the poles to measure oceanographic conditions
Field trip guide to Mount St. Helens, Washington—Recent and ancient volcan
Field trip guide to Mount St. Helens, Washington—Recent and ancient volcanThe Field trip guide to Mount St. Helens, Washington—Recent and ancient volcaniclastic processes and deposits is available in the USGS Publications Warehouse, at https://doi.org/10.3133/sir20175022E.
Field trip guide to Mount St. Helens, Washington—Recent and ancient volcan
Field trip guide to Mount St. Helens, Washington—Recent and ancient volcanThe Field trip guide to Mount St. Helens, Washington—Recent and ancient volcaniclastic processes and deposits is available in the USGS Publications Warehouse, at https://doi.org/10.3133/sir20175022E.
Geophysicist Sarah Conway, USGS HVO geophysicist
Geophysicist Sarah Conway, a member of the USGS Hawaiian Volcano Observatory's deformation team, readies a temporary GPS station during a campaign survey of benchmarks on Kīlauea Volcano to monitor changes in the ground surface.
Geophysicist Sarah Conway, a member of the USGS Hawaiian Volcano Observatory's deformation team, readies a temporary GPS station during a campaign survey of benchmarks on Kīlauea Volcano to monitor changes in the ground surface.