Block diagram of a normal fault, where the footwall drops below the level of the headwall
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Normal fault
Block diagram of a normal fault, where the footwall drops below the level of the headwall
Transform fault
Block diagram of a lateral (strike-slip) fault, where two blocks are moving sideways past each other without vertical motion.
Block diagram of a lateral (strike-slip) fault, where two blocks are moving sideways past each other without vertical motion.
Reverse fault
Block diagram of a reverse fault, where the headwall is being pushed above the level of the footwall
Block diagram of a reverse fault, where the headwall is being pushed above the level of the footwall
Daniel O'Hara
Daniel O'Hara, Mendenhall Fellow at the USGS California Volcano Observatory.
Daniel O'Hara, Mendenhall Fellow at the USGS California Volcano Observatory.
Spectrogram of Mammoth Mountain earthquake swarm, November 28, 2024
These spectrograms of seismic stations near Long Valley's Mammoth Mountain show the brightly-colored punctuated spasms of small earthquakes happening within a 10 minute period.
These spectrograms of seismic stations near Long Valley's Mammoth Mountain show the brightly-colored punctuated spasms of small earthquakes happening within a 10 minute period.
Genna Chiaro
USGS Mendenhall Postdoctoral Scholar Genna Chiaro specializes in petrology, geochronology, and volcanology.
USGS Mendenhall Postdoctoral Scholar Genna Chiaro specializes in petrology, geochronology, and volcanology.