M3.0 Earthquake 8 km ENE of P?hala, Hawaii — October 30, 2021
2021-10-30 17:09:54 UTC (2021-10-30) · approx. 7:09 AM UTC-10 local
On October 30, 2021 at 17:09 UTC, a magnitude 3.0 shallow crustal earthquake struck 8 km ENE of P?hala, Hawaii, at a depth of 32.5 km and coordinates 19.2353°, -155.4032°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 494 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 72 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-155.4032°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near P?hala, Hawaii?
The magnitude 3.0 earthquake that struck 8 km ENE of P?hala, Hawaii on October 30, 2021 at 17:09 UTC had a depth of 32.5 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: hv72775502). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 30, 2021). M3.0 Earthquake 8 km ENE of P?hala, Hawaii — October 30, 2021. Retrieved January 14, 2022 from https://www.earthquaketracker.org/earthquakes/event/hv72775502/