M 5.5 Ridgecrest aftershock

  Today, the largest aftershock of the 2019 M7.1 Ridgecrest sequence since July 6 struck at the south end of the rupture zone. It’s likely a right-lateral strike-slip earthquake, perhaps …

Seismic hazard increased following 2019 Ridgecrest event

By: Christian Fogerty, Science Writer (@ChristianFoger1)   Seismologists used a recently developed model to forecast aftershocks following the recent Ridgecrest earthquake sequence. Their findings revealed a short-term increase in seismic …

Large quakes make rocks jump

During large quakes, rocks can jump or shift from their initial locations. How far they traveled tells scientists how much the ground moved during rupture.   By Alka Tripathy-Lang, Ph. …

M6.5 Tonopah event ruptured two faults

The M 6.5 Tonopah event appears to include a main left-lateral rupture on an E-W fault, and a secondary right-lateral rupture on a N-S Fault. This type of sequence, termed …

Earthquake strikes Utah amid COVID-19 pandemic

By Tiegan Hobbs, Ph.D., Postdoctoral Seismic Risk Scientist, Temblor (@THobbsGeo) As residents prepared for a pandemic, a magnitude-5.7 quake shook Salt Lake City, causing a chemical spill in the nearby …

PUSH (Probabilistic Uniform Seismic Hazard)

PUSH is the first globally consistent seismic hazard model. Full hazard curves at any return period are available in several key intensity measures corresponding to homes, moderate buildings, and tall …

California Earthquake Early Warning tested by moderate Bay Area earthquakes

Warnings were issued for the magnitude-4.5 and magnitude-4.7 quakes 5-6 seconds after they ruptured via ShakeAlert, and alerts reached beta testers of the MyShake app about 2 seconds later. While important progress, these intrinsic delays mean that those who experienced strong shaking received no warning. Alert delays may be longer as the number of alert recipients grows.

Lasers speed up seismic damage assessments

Engineers may have found a way to measure displacement between floors of multistory buildings cheaply, accurately and in real-time, paving the way for quick analysis of the stability of critical infrastructure (e.g. hospitals, airports, water treatment plants) in the event of an earthquake.