USGS scientists Andrew Schwartz and Dan Hanes maneuver a current profiler for a study of surf-zone hydrodynamics at Ocean Beach, on the west side of San Francisco, California. Beach erosion has been a continuing problem in this area.
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Studying Surf-Zone Hydrodynamics
USGS scientists Andrew Schwartz and Dan Hanes maneuver a current profiler for a study of surf-zone hydrodynamics at Ocean Beach, on the west side of San Francisco, California. Beach erosion has been a continuing problem in this area.
Black-tailed Prairie Dogs (Cynomys ludovicianus)
Black-tailed prairie dogs in an field bordered by a road (on right out of view) in Englewood, Colorado, on the southern border of Denver. 10:39 am.
Black-tailed prairie dogs in an field bordered by a road (on right out of view) in Englewood, Colorado, on the southern border of Denver. 10:39 am.
PubTalk 1/2006 — Serving California's Needs
HOW THE CALIFORNIA GEOLOGICAL SURVEY IDENTIFIES AND MAPS NATURAL HAZARDS, PROMOTES THE STATE'S ECONOMY, AND PROTECTS PUBLIC HEALTH AND SAFETY
By George J. Saucedo and Keith L. Knudson, Geologists
HOW THE CALIFORNIA GEOLOGICAL SURVEY IDENTIFIES AND MAPS NATURAL HAZARDS, PROMOTES THE STATE'S ECONOMY, AND PROTECTS PUBLIC HEALTH AND SAFETY
By George J. Saucedo and Keith L. Knudson, Geologists
Rangers attempting to clean trash out of Morning Glory Pool in 1975.
Rangers attempting to clean trash out of Morning Glory Pool in September 1975. National Park Service photograph Dan Ing.
Rangers attempting to clean trash out of Morning Glory Pool in September 1975. National Park Service photograph Dan Ing.
A gas plume arising from Augustine Volcano during it's eruptive phase 2005-06.
A gas plume arising from Augustine Volcano during it's eruptive phase 2005-06. This photo was taken during a FLIR/maintenance flight on January 24, 2006.
A gas plume arising from Augustine Volcano during it's eruptive phase 2005-06. This photo was taken during a FLIR/maintenance flight on January 24, 2006.
Scanning Electron Microscope (SEM)
SEM (Scanning electron Microscope) image of a vesicular ash particle erupted by Augustine volcano on January 13, 2006. The ash sample was collected during the ashfall in Homer, Alaska by John Paskievitch, AVO.
SEM (Scanning electron Microscope) image of a vesicular ash particle erupted by Augustine volcano on January 13, 2006. The ash sample was collected during the ashfall in Homer, Alaska by John Paskievitch, AVO.
Augustine Volcano
Augustine volcano viewed from the west.
Augustine volcano viewed from the west.
Crab Shell and Seaweeds
A crab shell is left on top of seaweed and other marine detritus washed up by waves on a beach.
A crab shell is left on top of seaweed and other marine detritus washed up by waves on a beach.
Cuyahoga River at Independence OH
Cuyahoga River at Independence OH - river section submerged
Cuyahoga River at Independence OH - river section submerged
Cuyahoga River at Independence OH - downstream from bridge
Cuyahoga River at Independence OH - downstream from bridge
Cuyahoga River at Independence OH - downstream from bridge
Diatoms (25 Species)
A photomicrograph featuring a set of 25 separate diatom species.
A photomicrograph featuring a set of 25 separate diatom species.
Diatoms (25 Species)
A photomicrograph featuring a set of 25 separate diatom species as photographed under original lighting conditions.
A photomicrograph featuring a set of 25 separate diatom species as photographed under original lighting conditions.
Diatoms (Multiple Species)
A photomicrograph featuring a set of diatom species arranged in an artistic star-like pattern.
A photomicrograph featuring a set of diatom species arranged in an artistic star-like pattern.
Kīlauea East Rift Zone lava flows and fissures, July 11, 1:00 p.m. HST
Map as of 1:00 p.m. HST, July 11, 2018. Given the dynamic nature of Kīlauea's lower East Rift Zone eruption, with changing vent locations, fissures starting and stopping, and varying rates of lava effusion, map details shown here are accurate as of the date/time noted. Shaded purple areas indicate lava flows erupted in 1840, 1955, 1960, and 2014-2015.
Map as of 1:00 p.m. HST, July 11, 2018. Given the dynamic nature of Kīlauea's lower East Rift Zone eruption, with changing vent locations, fissures starting and stopping, and varying rates of lava effusion, map details shown here are accurate as of the date/time noted. Shaded purple areas indicate lava flows erupted in 1840, 1955, 1960, and 2014-2015.
Kīlauea lower East Rift Zone lava
Helicopter overflight photo taken this morning - view toward the west directly above Kapoho Crater. The fissure 8 lava channel now bends sharply to the south on the western edge of the crater after being blocked and diverted yesterday.
Helicopter overflight photo taken this morning - view toward the west directly above Kapoho Crater. The fissure 8 lava channel now bends sharply to the south on the western edge of the crater after being blocked and diverted yesterday.
Radiolarians (3 Species)
Photomicrograph featuring three radiolarian species.
Photomicrograph featuring three radiolarian species.
Before and after photos showing destroyed pier house and classic home
In the top image, taken in 1998, notice the pier, pier house, and the antebellum house. The bottom image shows the same location on August 31, 2005, two days after Hurricane Katrina made landfall. This photo shows the complete destruction of these landmarks.
In the top image, taken in 1998, notice the pier, pier house, and the antebellum house. The bottom image shows the same location on August 31, 2005, two days after Hurricane Katrina made landfall. This photo shows the complete destruction of these landmarks.
Blackbrush and Transect, Mojave National Preserve
Dense cover of native blackbrush, with a low diversity of shrubs. There are few if any invasive plants in the community.
Dense cover of native blackbrush, with a low diversity of shrubs. There are few if any invasive plants in the community.
Boulder Glacier - 2005 black and white
Boulder Glacier - 2005 black and white
Boulder Glacier - 2005 black and white
Chaney Glacier - notch - 2005 color
Chaney Glacier - notch - 2005 color
Chaney Glacier - notch - 2005 color
Chaney Glacier - Terminus - 2005 color
Chaney Glacier - Terminus - 2005 color
Chaney Glacier - Terminus - 2005 color