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 …

2021年及2010年海地大地震是渐进破裂过程中的一部分吗?

2010 年的海地7.0级地震可能加快了 2021 年 8 月 14 日海地7.2级地震的发生。 一些证据显示海地的地震系列正在向西延伸,但海地东部断层的高应力区仍然存在。   原文作者:Ross Stein (美国Temblor, Inc., California); Shinji Toda 远田晋次 (日本东北大学); Jian Lin 林间 (中科院南海海洋研究所/南方科技大学/美国伍兹霍尔海洋研究所); Volkan Sevilgen (美国Temblor, Inc., California)   中文翻译:郭宗林(中科院南海海洋研究所);郭来银(南方科技大学);周志远(中科院南海海洋研究所) …

2010年ハイチ地震(M7.0),2021年ハイチ地震(M7.2)は長大断層の破壊進展過程を示しているのか.

甚大な被害をもたらした2010年のマグニチュード(M)7.0のハイチ地震は2021年8月14日のM7.2地震を促進した可能性が高い.今後も時間差を置いて同様の大地震が2つの震源の西側で起きやすい状況が続くと考えられる.一方で,首都ポルトープランスを含む東側にも伝播した歪みは残っており予断を許さない.   By ロス・スタイン(テンブラー社),遠田晋次(東北大学災害科学国際研究所), ジン・リン(南方科技術大学,ウッズホール海洋研究所), ボルカン・セビルゲン(テンブラー社)   Citation: Stein, R.S., Toda, S., Lin, J., Sevilgen, V., 2021, Are the 2021 and 2010 Haiti earthquakes part of a progressive sequence?, Temblor, …

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.