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Early-morning earthquake on Thanksgiving jostles Southcentral
Alaskasnewssource.com and 2 more
- A Thanksgiving morning quake swarm near The Geysers in Northern California included a 3.6-magnitude event, underscoring ongoing low-to-moderate seismic activity in a geothermal area.
- New timing and location details from the NYT reference place the initial quakes around 4:21 a.m. PT about 2 miles southeast of The Geysers, refining the event's geographic context.
- The Geysers region remains a seismic hotspot due to energy extraction, with tremor patterns tied to steam production and reservoir dynamics.
- Seismologists explain that steam extraction and water reinjection stress surrounding rock, contributing to quake sequences in geothermal settings.
- USGS cautions that a magnitude-5 event remains possible but larger earthquakes are unlikely at The Geysers due to the absence of a continuous large fault.
- The Thanksgiving activity followed a prior 4.0-magnitude quake near Silicon Valley and aftershocks, signaling evolving aftershock patterns in the region.
- The NYT map notes ongoing data revisions and potential adjustments to magnitude and shake-severity assessments as scientists review new information.
- Aftershocks can occur days, weeks, or years after the initial quake and may be of equal or larger magnitude, affecting already damaged areas.
- The NYT piece situates the event within the broader Northern California seismic context, highlighting both natural and human-linked risk around San Francisco and The Geysers.
- Overall, the incident reinforces The Geysers' seismic sensitivity and the importance of monitoring in energy-extraction regions.
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