A theoretical study explores why small earthquake sources can produce quasiperiodic sequences of identical events, whereas earthquakes on large faults are intrinsically more variable.
earthquakes
Posted inScience Updates
Exposing Los Angeles’s Shaky Geologic Underbelly
Current calculations might underestimate the susceptibility of Los Angeles to earthquake shaking, so researchers and volunteers are deploying seismic networks near the city to remedy a data shortage.
![Figure 4 from paper by Preuss et al. [2019]](https://eos.org/wp-content/uploads/2019/09/2019JB017324-Figure-4-sized.png)
Posted inEditors' Highlights
Can We Tell If Faults Grew During or Between Earthquakes?
Numerical simulations of earthquake cycle deformation reveal that co-seismic and interseismic fault propagation can produce distinct propagation angles that may be recorded in the crust.
Posted inResearch Spotlights
Distant Quake Triggered Slow Slip on Southern San Andreas
A high-resolution map of surface displacements indicates that the 2017 Chiapas earthquake caused substantial creep along a segment of the San Andreas Fault, located 3,000 kilometers away.
Posted inNews
Nuclear Bomb or Earthquake? Explosions Reveal the Differences
A series of controlled chemical detonations in the Nevada desert is helping researchers discern between ground shaking caused by nuclear explosions and earthquakes.
Posted inNews
Wind-Triggered Ground Shaking Masks Microseismicity
Ground motion caused by gusts of wind can drown out signals from the smallest earthquakes, potentially confusing earthquake detection algorithms.
Posted inNews
Sinking Wastewater Triggers Deeper, Stronger Earthquakes
The effects of pumping wastewater from oil and gas extractions may last a decade or more after the injections stop.
Posted inEditors' Highlights
Groundwater Drawn Downward After Kumamoto Quake
A unique set of high-frequency groundwater level monitoring reveals a loss of approximately ten million cubic meters of groundwater after a major earthquake.
Posted inNews
Earthquakes Shake Up Groundwater Systems
Increased permeability temporarily boosts water flow.
Posted inNews
How Satellite Data Improve Earthquake Monitoring
Case studies from around the world illustrate the power of geodetic data in earthquake monitoring.