Boston College seismologist John Ebel and his colleagues have noted a pattern for some large California earthquakes: magnitude 4 or larger earthquakes occur at a higher rate along a fault in the two decades or more prior ...
Earth Sciences
Apr 19, 2021
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Data from a GPS network in Colombia have revealed a shallow and fully locked part on the Caribbean subduction zone in the country that suggests a possible large earthquake and tsunami risk for the northwest region.
Earth Sciences
Apr 19, 2021
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In the Cascadia subduction zone, medium and large-sized 'intraslab' earthquakes, which take place at greater than crustal depths within the subducting plate, will likely produce only a few detectable aftershocks, according ...
Earth Sciences
Apr 13, 2021
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Comparison of coda waves, the scattered waves that arrive after the direct waves of a seismic event, can be used to determine the relative locations of two underground explosions, according to a new study published in the ...
Earth Sciences
Apr 6, 2021
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8
The NASA-funded Seismometer to Investigate Ice and Ocean Structure (SIIOS) performed well in seismic experiments conducted in snowy summer Greenland, according to a new study by the SIIOS team led by the University of Arizona ...
Earth Sciences
Mar 17, 2021
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As scientists increasingly rely on eyewitness accounts of earthquake shaking reported through online systems, they should consider whether those accounts are societally and spatially representative for an event, according ...
Earth Sciences
Jan 21, 2021
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7
The summer 2018 eruption of Kīlauea Volcano on the Island of Hawai'i was one of the most significant in the volcano's history, collapsing a large portion of the summit caldera, erupting massively from its flank and triggering ...
Earth Sciences
Dec 9, 2020
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21
A rupture along the full length of the fast-slipping Alpine Fault on New Zealand's South Island poses the largest potential seismic threat to the southern and central parts of the country. But new evidence of a 19th century ...
Earth Sciences
Dec 1, 2020
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7
An earthquake of magnitude 8.0 or larger will almost always cause strong shaking, but a new study suggests that smaller earthquakes—those around magnitude 5.5 or so—are the cause of most occurrences of strong shaking ...
Earth Sciences
Nov 4, 2020
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44
A paleoseismic trench dug across the Gales Creek fault, located about 35 kilometers (roughly 22 miles) west of Portland, Oregon, documents evidence for three surface-rupturing earthquakes that took place about 8,800, 4,200 ...
Earth Sciences
Oct 20, 2020
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