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The Hualien cluster is named for a city on the east coast of Taiwan. The region has been very seismically active at magnitudes up to low magnitude 6 in recent decades but on April 2, 2024 it experienced a 7.4 Mw earthquake. The cluster includes the mainshock of the April 2024 sequence and 15 of the larger aftershocks. Local and regional data from the very dense Taiwan network is available for events up to June 2022 but for the more recent events only a handful of the Taiwanese stations were available at the time of this analysis. Recent events all have large datasets of far-regional and teleseismic readings, however, and are well-constrained in the cluster. Only three events have magnitude less than 5.0. All events...
The Climate Adaptation Science Centers (CASCs) partner with natural and cultural resource managers, tribes and indigenous communities, and university researchers to provide science that helps fish, wildlife, ecosystems, and the communities they support adapt to climate change. The CASCs provide managers and stakeholders with information and decision-making tools to respond to the effects of climate change. While each CASC works to address specific research priorities within their respective region, CASCs also collaborate across boundaries to address issues within shared ecosystems, watersheds, and landscapes.
The development and deployment of digital broadband seismographs provides the data required to rapidly assess earthquake size, determine source parameters and better characterize ground motions affecting earthquake hazard. The focus of regional moment tensor analysis is to estimate the moment magnitude, faulting parameters and source depth of earthquakes that are too small to be recorded teleseismically. Thus they have the potential of extending the earthquake catalog to magnitudes less than about M4-4.5. This data distribution provides the details required to critically review the resulting catalog, e.g., the waveforms used, processing parameters and velocity model. In addition the issue of the correct local...
Categories: Data,
Data Release - In Progress;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile
The Califon cluster is named for the town of Califon, New Jersey, U.S.A., near the epicenter of a 4.8 Mw earthquake on April 5, 2024. Several M3 events have occurred in the area but no other M4 events in recent decades. Except for the April 5 event, there are very few observations beyond ~700 km. Nevertheless the area is well instrumented and the small earthquakes are very well located. Eight of the late aftershocks of the April 5, 2024 earthquake were recorded by a temporary network at very close range, which helped constrain their focal depths and the crustal velocity model. All events have depth control from near-source or local-distance readings. ...
The Nabesna cluster is named for the settlement of Nabesna in the northern part of Wrangell-St. Elias National Park in southeasternAlaska. The cluster includes three M5 earthquakes. All events are observed to at least 5° epicentral distance. All events have depth control from near-source or local-distance readings. The station coverage for location calibration is excellent. Number of events: 137 Calibration type: direct calibration using data to 1.0 degrees; hypocentroid calibration level = 0.9 km Epicentral calibration range: 1 - 3 km Date range: 19841123 - 20240208 Latitude range: 61.810...
Provided here is a globally distributed catalog of earthquakes and nuclear explosions with calibrated hypocenters, referred to as the Global Catalog of Calibrated Earthquake Locations or GCCEL. This dataset contains more than 23,736 earthquakes in 344 well distributed clusters. Currently there are more than 4M arrival times with the majority being the Pg, Pn, P, Sg, Sn and S phases. The term “calibrated” refers to the property that the hypocenters are minimally biased by unknown Earth structure and that the uncertainties are meaningful. Uncertainties are calculated using empirically determined variability of the arrival time data itself, specific to each calibrated cluster of hypocenters. The data are carefully...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Earth,
biota,
earthquake occurrences,
earthquakes,
earthquakes,
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