Images

Robert (Tad) Perry Executive Director SD Board of Regents speaking at the September 1, 2005 dedication ceremony of the SDSU and USGS EROS Center Geographic Information Science Center of Excellence (GIScCE) in Brookings, SD.

Tree kills at Horseshoe Lake.

The tree kill area at Horseshoe Lake is visible from the top of Mammoth Mountain.

Sr. Scientist Gabriel Senay attending the September 1, 2005 dedication ceremony of the SDSU and USGS EROS Center Geographic Information Science Center of Excellence (GIScCE) in Brookings, SD.

Rapid Response Inundation Map of New Orleans after Hurricane Katrina in 2005. 

Fence that used to protect the public from the pools now goes through one.

Field trip starting point on Lookout Mountain.

Professor Emeritus Ed Hogan attending the September 1, 2005 dedication ceremony of the SDSU and USGS EROS Center Geographic Information Science Center of Excellence (GIScCE) in Brookings, SD.

Overlain photographs from a time-lapse camera show the East Lae‘apuki lava delta before and after part of the delta collapsed on August 27, 2005. The collapse occurred piecemeal during a 90-minute period. Loose rocks on the remaining delta were deposited there by large waves generated during the initial collapse.

Embayment of lava delta shows result of collapse. The initial collapse was large enough to send waves washing over much of the east half of the delta, because visibility was completely lost for almost 20 minutes, due to a steam white-out. Note rocky debris hurled by the waves onto the delta surface in foreground.

Caught by a time-lapse camera, collapse of East Lae‘apuki lava delta in the early morning hours of August 27, 2005, generated waves that swept large lava fragments onto the delta. Daylight revealed boulders as large as 1 m (3 ft) in diameter on the surviving delta surface directly beneath the camera.

Kīlauea Volcano's east Lae‘apuki lava delta pictured hours before it collapsed into the sea over a 90-minute period. White plume marks location of lava entering sea fed by a lava tube within delta.

Loowit Falls flows north out of Mount St. Helens crater. White building in upper right corner is the Loowit gage house, which contains an Acoustic Flow Monitor.

pāhoehoe lava spilling over sea cliff on south coast of Kīlauea Volcano starts to build a new lava delta. Only three days old, the delta grows slowly as lava spreads over fragmented debris and flows that have accumulated on the steep submarine slope.

Explosive interaction between lava and seawater blasts a tephra jet consisting of steam, hot water, black tephra, and molten fragments into the air. Such explosions are typically directed toward the sea, but many explosions also send a shower of lava more than 10 to 20 m (33 to 66 ft) inland.

Active lava delta at East Lae‘apuki on the south coast of Kīlauea Volcano. White gas plume (right) marks location of lava entering the sea through a lava tube whose location is shown by blueish fume (left and center). In early August 2005, the delta encompassed an area of about 12 hectares (30 acres).

Scientists maintain an Acoustic Flow Monitor (AMF) at Mount St. Helens, Washington. It detects ground movement associated with lahars.

I was hiking to Mt. Cammerer in the park and got caught in a torrential thunderstorm.  On my way back to the campground, I met this view of the swollen creek and crossed by foot using hiking poles at the widest, shallowest point I could find. 

Fissure 8 and the upper lava channel, as viewed during the early morning helicopter overflight on July 22, 2018.

South-facing aerial view of Mount St. Helens with Mount Hood (left) and Mount Jefferson (right) on the horizon. June 8, 2005.

Drought and beetle-killed piñon pines in Walnut Canyon National Monument near Flagstaff, Arizona, amid some surviving trees. Forest drought stress is highly correlated with mortality from poor growth, bark beetle outbreaks, and high-severity fire.