M3.4 Earthquake 6 km NNE of Puako, Hawaii — October 8, 2025
2025-10-08 17:23:53 UTC (2025-10-08) · approx. 7:23 AM UTC-10 local
Felt by 148 people across surrounding communities.
On October 8, 2025 at 17:23 UTC, a magnitude 3.4 shallow crustal earthquake struck 6 km NNE of Puako, Hawaii, at a depth of 23.3 km and coordinates 20.0278°, -155.8108°. This earthquake was detected by 60 seismic stations with good location accuracy and was assigned a USGS significance rating of 229, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 123 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Hawaii, a region characterized by intraplate volcanic activity over the Hawaiian mantle plume hotspot, with seismicity driven by magma intrusion and flank instability. View all earthquakes in Hawaii.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 148 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-155.8108°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.4 earthquake near Puako, Hawaii?
The magnitude 3.4 earthquake that struck 6 km NNE of Puako, Hawaii on October 8, 2025 at 17:23 UTC had a depth of 23.3 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 20.0278°, -155.8108°, which is 6 km NNE of Puako, Hawaii. View all earthquakes in Hawaii.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.4 earthquakes can continue for several days and gradually diminish over time.
Has Hawaii had earthquakes this big before?
The largest recorded earthquake in Hawaii was the M7.9 Ka'u District earthquake of April 2, 1868. Today's magnitude 3.4 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: hv74798307). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 8, 2025). M3.4 Earthquake 6 km NNE of Puako, Hawaii — October 8, 2025. Retrieved May 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/hv74798307/