Very low frequency events in the gap zone of Cascadia illustrate how stress evolves on megathrusts, advancing our understanding of rupture dynamics.
earthquakes
Posted inResearch & Developments
New news about doge stuff
Uncovering the geologic structure beneath Earth’s surface is important for a variety of reasons, including identifying natural resources and studying earthquake hazards. Scientists image Earth’s subsurface by observing seismic waves that travel through our planet.
When an earthquake occurs, several types of waves radiate from the event’s source. P waves and S waves move through the interior, and Love and Rayleigh waves (known as “surface waves” or “normal modes”) move across Earth’s surface. The speeds at which these waves travel and how each type is scattered in the subsurface can reveal a wealth of different information about underground structure.
Posted inFeatures
Distributed Sensing and Machine Learning Hone Seismic Listening
Fiber-optic cables can provide a wealth of detailed data on subsurface vibrations from a wide range of sources. Machine learning offers a means to make sense of it all.
Posted inResearch Spotlights
ICON Principles Underused as a Natural Hazards Research Tool
Scientists identify barriers to and opportunities for applying integrated, connected, open, and networked research strategies to natural hazards studies.
Posted inNews
Searching for Earthquakes in the Ionosphere
Earthquakes may release bursts of electrical energy that can be felt in the ionosphere, kilometers above Earth. The theory remains controversial, though.
Posted inResearch Spotlights
Comparing Machine Learning Models for Earthquake Detection
A new study evaluated the performance of emerging deep learning models for earthquake detection, phase identification, and phase picking.
Posted inResearch Spotlights
Fiber-Optic Cables Can Produce High-Resolution Underground Maps
Telecom fiber repurposed as distributed acoustic sensing arrays can image near-surface structure and potentially improve seismic hazard mapping in urban areas.
Posted inNews
A Giant Impact Triggered Earthquakes for Thousands of Years
When an asteroid struck South Africa during the Precambrian, earthquakes rocked the region for millennia as Earth’s crust reequilibrated, new research reveals.
Posted inENGAGE, News
Mountains Sway to the Seismic Song of Earth
The Matterhorn in the Swiss Alps is in constant motion, gently swaying back and forth about once every 2 seconds.
Posted inNews
Rising Seas Boost Tsunami Impacts on Distant Shorelines
Modeling suggests that rising sea levels will render Southern California ports increasingly vulnerable to waves from distant-source tsunamis.