New research using a highly complete earthquake catalog shows that 72% of M4+ mainshocks are preceded by foreshocks, implying that foreshock activity is much more prevalent than previously thought.
Seismology
Posted inResearch Spotlights
A New Way of Visualizing Iceland’s Crustal Deformation
A novel method of calculating strain rates from GPS data shows the South Iceland Seismic Zone is experiencing rapid deformation, including inflation near the island’s most active volcano.
Posted inResearch Spotlights
All Types of Large Earthquakes Produce Prompt Gravity Signals
New observations of recently discovered gravity perturbations that precede seismic waves have the potential to improve earthquake early-warning systems in California and other tectonic settings.
Posted inScience Updates
Seismologists Search for the Indian Ocean’s “Missing Mass”
An Indian scientific team set out to sea last year to find clues to the source of an unusually weak gravitational potential in the middle of the Indian Ocean.
Posted inScience Updates
Fiber-Optic Networks Find a New Use as Seismic Sensor Arrays
Distributed Acoustic Sensing: Principles and Case Studies; Washington, D.C., 9 December 2018
Posted inScience Updates
Putting the Cloud to Work for Seismology
The cloud infrastructure developed in the business community has made access to cluster computing possible for even the smallest research groups, enabling new kinds of research workflows in geophysics.
Posted inNews
Dimitri Komatitsch (1970–2019)
Dimitri Komatitsch had a profound impact on computational seismology and embodied the notion of open-source, collaborative research.
Posted inNews
Unused Fiber-Optic Cables Repurposed as Seismic Sensors
So-called dark fiber can serve as regional seismic activity monitors and also detect earthquakes thousands of kilometers away, according to new research.
Posted inEditors' Highlights
New Method to Measure Ice Cap Thickness
Naturally generated seismic waves bouncing up and down through an ice sheet can be used to determine the thickness of the ice and monitor future changes in ice thickness.
Posted inNews
Subsurface Imaging Sheds Light on Dead Sea Sinkholes
Using seismic waves, researchers study sediment layering near the Dead Sea to reveal how the area’s numerous sinkholes form.