The preferred method of SASW testing uses a continuous harmonic-wave source produced by a low-frequency computer-controlled electromechanical shaker (device at right) and multi-sensor linear seismometer arrays (2-sensors on the left). This site is 600-PS11, at Trans Alaska Pipeline, Alyeska Pump Station 11, Glennallen, Alaska.
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Spectral Analysis of Surface Waves testing
The preferred method of SASW testing uses a continuous harmonic-wave source produced by a low-frequency computer-controlled electromechanical shaker (device at right) and multi-sensor linear seismometer arrays (2-sensors on the left). This site is 600-PS11, at Trans Alaska Pipeline, Alyeska Pump Station 11, Glennallen, Alaska.
Coral Larvae
Underwater photograph of larvae being released into the water column from reef-building coral spawning off Maui the night of June 30, 2003. The white larvae are about 0.5 to 1.5 mm across.
Underwater photograph of larvae being released into the water column from reef-building coral spawning off Maui the night of June 30, 2003. The white larvae are about 0.5 to 1.5 mm across.
Monarch Butterflies on Dense Blazing Star
Image of the butterflies Danaus plexippus on the purple flowers of Liatris spicata.
Image of the butterflies Danaus plexippus on the purple flowers of Liatris spicata.
Monarch Butterflies on Dense Blazing Star
Image of the butterflies Danaus plexippus on the purple flowers of Liatris spicata.
Image of the butterflies Danaus plexippus on the purple flowers of Liatris spicata.
Monarch Butterfly
Monarch butterfly on a dense blazing star.
Monarch butterfly on a dense blazing star.
Monarch Butterfly
Monarch butterfly on dense blazing star.
Monarch butterfly on dense blazing star.
Monarch Butterfly
Monarch butterfly on dense blazing star.
Monarch butterfly on dense blazing star.
Shining Coneflower (Rudbeckia nitida)
Shining coneflower in Botanical Gardens.
Shining coneflower in Botanical Gardens.
Lava cascade
Same cascade as in first clip, but viewed more from side to see lava falling down cliff and spreading across surface of lava delta. Similar view to still image taken at 0548 today.
Same cascade as in first clip, but viewed more from side to see lava falling down cliff and spreading across surface of lava delta. Similar view to still image taken at 0548 today.
Lava issues from breached tube
Lava issues from breached tube and quickly disappears over old sea cliff. Note that center of stream stands above margins. See still taken at 0545 today.
Lava issues from breached tube and quickly disappears over old sea cliff. Note that center of stream stands above margins. See still taken at 0545 today.
PubTalk 6/2003 — The Quakes, They Are A-comin'
New Estimates of Earthquake Hazard and Risk Across the Bay Region
By Michael Blanpied, Geophysicist
New Estimates of Earthquake Hazard and Risk Across the Bay Region
By Michael Blanpied, Geophysicist
Surging cascade on steep cliff face
Surging cascade on steep cliff face. Note that surges override part of cascade next to cliff, which is slowed by friction with the cliff.
Surging cascade on steep cliff face. Note that surges override part of cascade next to cliff, which is slowed by friction with the cliff.
Groundwater sampling on Long Island
Groundwater sampling on Long Island
Groundwater sampling on Long Island
Lava in channeled breakout
Lava in channeled breakout from nearby tumulus flowing rapidly down steep slope before spreading out on flat ground. Same channel as shown in last two stills for today. Width of channel, about 2 m.
Lava in channeled breakout from nearby tumulus flowing rapidly down steep slope before spreading out on flat ground. Same channel as shown in last two stills for today. Width of channel, about 2 m.
Lake Sturgeon in the water
Lake Sturgeon in the Detroit River, 2003.
Lake Sturgeon in the Detroit River, 2003.
Pacific Brant family in Alaska
Pacific brant family on the Yukon-Kuskokwim Delta, Alaska.
Pacific brant family on the Yukon-Kuskokwim Delta, Alaska.
Gushing start of lava cascade
Gushing start of cascade shown in image taken at 0553. Lava comes from crusted flow to right. Width of flowing lava, about 1 m.
Gushing start of cascade shown in image taken at 0553. Lava comes from crusted flow to right. Width of flowing lava, about 1 m.
Lava flow
Downstream from first clip about 2 m. Same as shown in image taken at 0554.
Downstream from first clip about 2 m. Same as shown in image taken at 0554.
Two strands of flowing lava come together
Two strands of flowing lava come together to form single cascade on upper part of old sea cliff at Highcastle. Still taken at 0546 shows same scene.
Two strands of flowing lava come together to form single cascade on upper part of old sea cliff at Highcastle. Still taken at 0546 shows same scene.
Burned Juniper Trees From a Wildfire
Area of burned trees from a 2002 wildfire, caused by a lightning strike, at Mesa Verde National Park.
Area of burned trees from a 2002 wildfire, caused by a lightning strike, at Mesa Verde National Park.
Delicate Arch
The world-famous Delicate Arch was formed by the movement of underground salt beds beneath overlying sandstone, in concert with surface events including water, ice, and erosion, which washed away or broke off the sandstone to create the arches and fins found throughout Arches National Park.
The world-famous Delicate Arch was formed by the movement of underground salt beds beneath overlying sandstone, in concert with surface events including water, ice, and erosion, which washed away or broke off the sandstone to create the arches and fins found throughout Arches National Park.