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USGS Volcano Notice - DOI-USGS-HVO-2025-10-03T07:13:55+00:00

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HAWAIIAN VOLCANO OBSERVATORY INFORMATION STATEMENT
U.S. Geological Survey
Thursday, October 2, 2025, 9:17 PM HST (Friday, October 3, 2025, 07:17 UTC)


HAWAIIAN VOLCANO OBSERVATORY INFORMATION STATEMENT 

On Thursday, October 2, 8:28 p.m. HST, a magnitude-3.9 earthquake occurred 1 mi (2 km) south-southwest of Pāhala on the Island of Hawaiʻi at a depth of 18 mi (30 km) below sea level. The earthquake had no apparent impact on either Mauna Loa or Kīlauea volcanoes. 

The USGS Hawaiian Volcano Observatory continues to monitor Hawaiian volcanoes for any changes. 

EARTHQUAKE DESCRIPTION 

  • Magnitude: 3.9 
  • Date and Time: October 2, 2025, at 8:28 p.m. HST 
  • Location: 1 mi (2 km) SSW of Pāhala 
  • Depth: 18 mi (30 km) below sea level 
  • Aftershocks are possible in the coming days to weeks 

EARTHQUAKE INTENSITY AND AFFECTED AREA 

  • Potential Damage: No damage to buildings or infrastructure expected based on earthquake intensity 
  • Maximum Intensity, Modified Mercalli Scale (https://www.usgs.gov/natural-hazards/earthquake-hazards/science/modified-mercalli-intensity-scale) 
  • Community-reported: V - moderate shaking 
  • Instrument-derived: III - weak shaking 
  • Felt Reports: More than 39 within the first half hour (http://earthquake.usgs.gov/dyfi/) 
  • Felt Area: WHERE on Island of Hawaiʻi (NOTE IF OTHER ISLANDS FELT) 
  • Visit NOAA’s Tsunami Warning Center website for updated information: https://www.tsunami.gov/ 

EARTHQUAKE MAPS AND ADDITIONAL INFORMATION 

  • USGS National Earthquake Information Center Maps and Reports for this Event: https://earthquake.usgs.gov/earthquakes/eventpage/hv74791302 
  • USGS-HVO Interactive Earthquake Map of Hawaiʻi: https://www.usgs.gov/observatories/hawaiian-volcano-observatory/earthquakes 


The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi and American Samoa.



CONTACT INFORMATION:

askHVO@usgs.gov



Subscribe to these messages: https://volcanoes.usgs.gov/vns2/
Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hvo/hazards
Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hvo
Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/programs/VHP/volcanic-alert-levels-characterize-conditions-us-volcanoes