Images

Mount Hood, Oregon, earthquakes from a swarm that occurred December 8-13, 2023 as compared to previous earthquakes. The recent earthquakes are shown with red circles. Earthquakes that have occurred since 2010 are shown as unfilled gray circles. All circles are sized by their magnitude. Top: Map view of seismicity at Mount Hood.

USGS Cascades Volcano Observatory field crew conducts maintenance at station LSON at Mount Hood (in the distance). LSON was one of three new stations installed at Mount Hood in 2020, to create a more robust monitoring network at this volcano. Photo taken September 14, 2021 by B. Pauk.

Photo of Mount Hood taken June 7, 2003. The fault-plane solution for the M 3.9 earthquake that occurred on June 5, 2021 is in the lower right corner. 

USGS Cascades Volcano Observatory Geophysicist Rebecca Kramer works on the installation of the GPS mast at new station LSON, at Mount Hood. The GPS measures subtle ground deformation that can occur in response to magma entering or leaving the magma reservoir several miles below the summit.

Combined seismic/GPS station LSON, on Mount Hood, installed at the end of September 2020. LSON is one of three new stations that enhance the existing monitoring network at this high-threat volcano.

View of the combined seismic/GPS station BRSP, on the north flank of Mount Hood, Oregon. Mount Hood is pictured in the distance.

A USGS Cascades Volcano Observatory field team finishes the installation of the combined seismic/GPS station, YOCR, at Mount Hood, Oregon.

A Cascades Volcano Observatory field team completes the installation of the combined seismic/GPS station YOCR, at Mount Hood.

USGS Cascades Volcano Observatory Geophysicist Wes Thelen, removes ropes from new station LSON, at Mount Hood (Mount Hood is pictured in the distance).

USGS Cascades Volcano Observatory Geophysicist Emily Montgomery-Brown uses a drill to create a small hole in volcanic rock that will support a GPS mast. The effort was part of a three-station installation project at Mount Hood in 2020. This station location is called BRSP.

A USGS Cascades Volcano Observatory field team waits on this remote north flank of Mount Hood, as a helicopter delivers supplies and equipment to station BRSP. The station was installed with minimal impact on the environment. A helicopter delivered equipment via external sling load and USGS personnel accessed the site by foot.

Volcano Disaster Assistance Program Geophysicist Jeremy Pesicek digs a hole for a seismometer at station BRSP, on the north flank of Mount Hood. The seismometer, which detects earthquakes, is buried at a depth of at least 1 meter (3 feet).

A perspective view of Mount hood, made from the OR_Sandy_River_2007 lidar data

Mount Hood photographed near Parkdale, Oregon.

The red line shows the total number of earthquakes that have occurred at Mount Hood between the year 2000 and May 16, 2016. During this period, there have been 829 earthquakes greater than magnitude 1. Note the number of earthquakes during the 2002 swarm.

Mount Hood Spectrograms for August 21, 2015.

View from the OR35 bridge over the White River looking downstream. Glistening areas are deposits from recent debris flows.

Sediment-laden White River 11 km downstream of the OR35 bridge. Heavy rains resulted in high-sediment loads within this river, which drains Mount Hood, Oregon.

Volcano monitoring station with external GPS antenna and digital seismometer (buried). Fiberglass enclosure houses power supply and communications, and is designed to withstand harsh weather.

Mount Hood, Oregon simplified hazards map showing potential impact area for ground-based hazards during a volcanic event.

Map showing one-year probability of accumulation of 1 centimeter (0.4 inch) or more of tephra from eruptions of volcanoes in the Cascade Range.