Images

GPS time series from station NRWY, near Norris Geyser Basin in Yellowstone National Park. The three plots show how the station is moving in a north-south direction (top), east-west direction (middle), and up-down direction (bottom).

The emission of volcanic gases, including sulfur dioxide and hydrogen sulfide, is not unusual at the summit of Kīlauea. However, sulfur dioxide gas emission rates are now lower than they have been since before 1983, with about 50 tonnes/day measured at the summit of the volcano on the day of this photo (October 24).

Aerial view of the fissure 8 cone and spillway captured by Civil Air Patrol during their overflight on August 7, 2018. View is toward the south.

These two plots show summit tilt (ground deformation) and seismicity (earthquake counts) on Kīlauea Volcano between July 15 and August 5, 2018. A regular pattern emerged in which seismicity gradually increased over 1-3 days (bottom), until the caldera floor suddenly dropped several meters (yards) in a matter of seconds.

Mount Rainier is much more than a mountain in the sky. Constructed of hundreds of lava flows, and capped by as much glacier ice as all other Cascade volcanoes combined, Rainier's steep rubbly slopes and abundant water make it prone to landslides and lahars, especially during eruptions. Are you ready for an eruption?

The inferred rupture area (white dashed line) of the May 4, 2018, magnitude-6.9 earthquake, with its foreshocks and first 10 days of aftershocks, spans an area of about 800 sq km (300 sq mi). Circle size indicates earthquake magnitude; color indicates earthquake depth. Magnitudes for some of the larger events are labeled.

GPS station P361, on Sawtell Peak, on a nice clear day. Electrical storms destroyed multiple antennas, including the GPS antenna--here under a protective plastic dome--and three communications antennas on the tower. Data from P361, along with data from other stations in the Yellowstone region, are sent to UNAVCO for free and open distribution.

UNAVCO field engineer Dylan Cembalski replaces damaged antennas on the communications tower at Sawtell Peak. The tower is shared by multiple groups that use this regional high point to relay data. (UNAVCO Photo by Summer Rhoades)

A viscous pāhoehoe flow from Kilauea Volcano, Hawaiʻi , entering the ocean near Isaac Hale Beach Park on the morning of August 5, 2018.

Are you ready for an eruption? Mount Baker dominates the skyline of northwestern Washington and southwestern British Columbia. Glacier Peak is mostly hidden from view. Both volcanoes have erupted in recent centuries and will erupt again, disrupting the landscape and the lives of people downstream and downwind. Learn what to do and where to get information.

Left: Horseshoe-shaped crater of Mount St. Helens in 1980, formed by a landslide that removed the top of the volcano. The crater is about 2 km (1.2 mi) wide and the floor is about 600 m (1,970 ft) below the crater rim. Right: Halema'uma'u nestled in the summit crater of Kīlauea Volcano on August 1, the day before the last collapse event.

This comparison shows satellite images of Leilani Estates subdivision before and after the May-August 2018 eruption. The image on the right, collected in early September 2018, shows that the eastern portion of the subdivision has been covered by lava. The Fissure 8 lava channel runs northeast, with the Fissure 8 cone at the start of the channel.

Sensor (top), deformed battery/electronics package (bottom), and titanium sheath (left) following recovery from vent location A in teh Deep Hole area on the floor of Yellowstone Lake.

A close up comparison of the Fissure 8 area in Leilani Estates subdivision. Leilani Avenue runs right-left (east-west) through the center of the images. On the right side, the crater in the Fissure 8 cone is visible, with the Fissure 8 lava channel extending north.

A USGS gas geochemist and colleagues from the United Kingdom carry multi-gas sensors as they approach the degassing fissure 8 cone during Kīlauea Volcano's 2018 eruption.

The Scanning Electron Microscopy lab at Menlo Park.

Early morning photo of Halema‘uma‘u, taken from the northeastern caldera rim.

Lava in the fissure 8 channel spillway was fairly low this morning, with the lava in the channel moving at a fairly low velocity.

New thermal feature beneath the boardwalk on Geyser Hill, Upper Geyser Basin. Bo

Ear Spring in Upper Geyser Basin, Yellowstone National Park on June 17, 2018

Sensors that monitor volcanic gas emissions at a station in Long Valley.