Images

Scientist measuring aspects of a precariously balanced rock in the northeastern U.S.

A map showing the epicenter of the M 3.5 quake that occurred 3.7 miles (6 km) east of Elgin, South Carolina on June 29, 2022. The quake is part of an ongoing sequence in central South Carolina. The sequence started on December 27, 2021, with an M3.3 earthquake near Lugoff, South Carolina.

Alex Hatem observes surface deformation from the 2020 Monte Cristo, Nevada, earthquake eroding away, June, 2022.

In June 2022, Mendenhall Fellow Sabine Loos (Research Civil Engineer in the Geological Hazards Science Center) presented a seminar to USGS's Earthquake Science Center at Moffett Field, CA, where Max Schneider (Research Statistician) works as a Mendenhall Fellow.

Rich Briggs and Alex Hatem make geologic observations within Nevada’s Monte Cristo Range, June, 2022.

Fault sections being used in the creation of the 2023 U.S. Seismic Hazard Maps. Blue lines are normal faults, yellow lines are reverse faults, and red lines are strike-slip faults.

Photo of participants working on training material on laptops.

The USGS training at the Bureau of Meteorology, Climatology and Geophysics (BMKG) includes hands-on activities. The BMKG staff are highly capable and have received an excellent educational background at the BMKG College or National University.

Group of BKMG training participants with Dr. Tim Ahern (IRIS), looking at training material on a screen. 

Dr, Walter Mooney with three Bureau of Meteorology, Climatology and Geophysics (BMKG) training participants in Palu, Sulawesi. 

Cartoon of half-space model. A half space is a mathematical model used to approximate the earth when performing some calculations in seismology. The model is much simpler than the real earth.

Diagram of dipping slab with different focal depth events. The focal depth refers to the depth of an earthquake hypocenter.

Small foreshocks on a seismic record. Foreshocks are relatively smaller earthquakes that precede the largest earthquake in a series, which is termed the mainshock. Not all mainshocks have foreshocks.

Diagram of frequency. The frequency is the number of times something happens in a certain period of time, such as the ground shaking up and down or back and forth during an earthquake.

Alluvium visible in Salt River, Arizona (Photo by Sharon Reynolds, Arizona State University)

Illustration of Isaac Newton sitting under an apple tree, a reference to the well-known story of the epiphany Newton had when an apple fell on his head and lead to him discovering gravity.

Geodesy is the science of determining the size and shape of the earth and the precise location of points on its surface.

The geologic time scale showing each eon, era, period, epoch, and their associated ages.

Photo of Zion Canyon located in Zion National Park in Utah, United States. (Image courtesy of Justin Gould)

Photo of the Grand Canyon located in Grand Canyon National Park, Arizona, Untied States.

Photo of GPS site with instrument on a tripod and a solar panel. (Photo by John Galetzka, U.S. Geological Survey)

Photo of bridge.  Geotechnical means referring to the use of scientific methods and engineering principles to acquire, interpret, and apply knowledge of earth materials for solving engineering problems.