The U.S. Geological Survey reported a magnitude 5.2 earthquake at 03:48:33 UTC on August 12, 2026, centered 42 kilometers east southeast of Naalehu, Hawaii, at a depth of 10.73 kilometers. The USGS issued a green alert for shaking related fatalities and economic losses, indicating low likelihood of casualties or damage. The agency's ShakeMap shows intensity IV (light) shaking, and it has received citizen reports of shaking via its 'Did You Feel It?' tool.
KEY FACTS
- The earthquake struck at 03:48:33 UTC on August 12, 2026, with an epicenter 42 km ESE of Naalehu, Hawaii.
- The USGS assigned a green alert, meaning low probability of casualties or damage.
- ShakeMap indicates intensity IV (light) shaking on the Modified Mercalli Intensity scale.
- The earthquake occurred at a depth of 10.73 km (6.67 miles).
- The USGS is collecting citizen observations through its 'Did You Feel It?' reporting system.
CONTEXT
The earthquake occurred in a seismically active region near the southern coast of the Island of Hawaii, an area shaped by volcanic activity and frequent earthquakes. The USGS is the primary federal authority monitoring seismic events in the United States. A green alert from the USGS PAGER system indicates that the expected number of fatalities and economic losses is low. Intensity IV shaking, as indicated on the ShakeMap, is typically felt by many indoors and some outdoors, with dishes and windows rattling. The depth of about 10.7 km is relatively shallow, which can amplify ground shaking near the epicenter. The USGS relies on both instrumental data and public reports to assess the impact of earthquakes. No other agencies have issued statements about this event at this time.
WHY IT MATTERS
This earthquake serves as a reminder of the seismic hazards facing Hawaii, where residents and infrastructure must be prepared for sudden ground motion. While the green alert suggests minimal impact, even moderate shaking can disrupt daily life and trigger concerns about volcanic activity or tsunamis. The USGS's rapid assessment and public reporting tools are critical for informing local emergency management and public safety decisions.
WHAT TO WATCH
- Monitor USGS for any updates on aftershocks or revised magnitude estimates.
- Watch for reports from Hawaii County Civil Defense or other local authorities regarding any impacts or advisories.
- Observe whether the 'Did You Feel It?' reports indicate higher intensity shaking in populated areas.
- Check for any statements from the Pacific Tsunami Warning Center, though no tsunami threat has been mentioned.