Quick Answer
A magnitude 6.0 earthquake struck the western flank of Mauna Loa on Hawaii Big Island at approximately 9:46 PM HST on May 22, 2026. The epicenter sat about 7.5 miles south of Hōnaunau-Nāpōʻopoʻo at a depth of roughly 14 miles below sea level.
The Pacific Tsunami Warning Center confirmed there is no tsunami threat to the Hawaiian Islands. The USGS issued a Yellow Alert for economic losses, indicating light to moderate localized damage is possible.
Earthquake Metrics
- Magnitude. Preliminary 5.9, upgraded to an official 6.0 by the USGS.
- Epicenter. About 7.5 miles (12 km) south of Hōnaunau-Nāpōʻopoʻo on the western coast of the Island of Hawaiʻi.
- Depth. Approximately 14 miles (23 km) below sea level.
- Felt Reports. More than 2,600 logged inside the first hour, stretching from the immediate epicenter in South Kona to Oahu and Kauai over 200 miles away.
Local Impact
South Kona and Kailua-Kona residents reported violent shaking lasting more than a minute, which threw items off shelves and shifted furniture.
"We got rocked here in South Kona. The whole house was rocking like a boat in rough seas. It threw me out of bed and knocked everything over."
Damage Assessments
- Structural. Emergency crews are checking older unreinforced masonry and local roads for cracks and rockfalls.
- Water utilities. Several residents reported large residential water tanks shifting on their foundations from the lateral force.
- Power grid. Hawaii Electric reported only minor localized outages, with crews deployed immediately to monitor stability.
Is There a Tsunami Warning for Hawaii?
The Pacific Tsunami Warning Center acted quickly to calm fears:
OFFICIAL STATEMENT: "Based on all available data, a destructive Pacific wide tsunami was not generated, and there is NO tsunami threat to the state of Hawaii."
Tsunamis typically require shallow vertical fault displacement under the ocean floor to move large columns of water. This 6.0 sat deep within the terrestrial volcanic flank, so it lacked the geological signature needed to trigger a wave.
Volcanic Linkage: Mauna Loa and Kīlauea
Because the epicenter sits on the west flank of Mauna Loa, and with Kīlauea in an episodic eruptive phase, many residents feared the quake was a precursor to a major eruption. The Hawaiian Volcano Observatory issued a clarifying statement:
+-------------------------------------------------------------+
| HVO SEISMIC SCIENCE BREAKDOWN |
+-------------------------------------------------------------+
| * Cause: Lithospheric bending under the weight of the |
| Hawaiian island chain. |
| * Volcanic Connection: None. Seismic waves indicate tectonic|
| stress release, not magma movement. |
| * Current Status: Mauna Loa and Kīlauea remain stable, with |
| no changes in deformation or gas emissions. |
+-------------------------------------------------------------+
HVO models had previously forecast a localized eruptive window for Kīlauea between May 24 and May 27, but scientists emphasize that the 6.0 was caused by tectonic plate adjustments rather than magma migration.
Aftershocks and Safety Advisory
Hawaii County Civil Defense has advised residents to stay vigilant. Several smaller tremors, mostly below magnitude 3.0, have already been recorded near Hōnaunau. Aftershocks are expected to continue for several days but are unlikely to cause further structural damage.
Residents are asked to report any visible infrastructure failures or road blockages to local emergency authorities so cleanup and inspection can continue across the Big Island.
The Bottom Line
The May 22, 2026 magnitude 6.0 was a significant tectonic event on the Big Island, not a volcanic precursor. There is no tsunami threat, damage is light to moderate and localized, and Mauna Loa and Kīlauea remain stable.
Deepening Your Research
For real time data on the aftershock sequence and updated damage maps, the USGS Earthquake Hazards Program page and the Hawaiian Volcano Observatory daily updates are the most authoritative sources.
