2018 Hawaii earthquake
On May 4, 2018, an earthquake with a magnitude of Mw 6.9 struck Hawaii island in the Hawaii archipelago at around 12:33 p.m. local time. The earthquake's epicenter was near the south flank of Kīlauea, which has been the site of seismic and volcanic activity since late April of that year. According to the United States Geological Survey the quake was related to the new lava outbreaks at the volcano, and it resulted in the Hilina Slump moving about two feet. It was the largest earthquake to affect Hawaii since the 1975 earthquake, which affected the same region, killing two people and injuring another 28.
Shakemap for the 2018 Hawaii earthquake | |
Hilo Honolulu | |
| UTC time | 2018-05-04 22:32:55 |
|---|---|
| ISC event | 611928827 |
| USGS-ANSS | ComCat |
| Local date | May 4, 2018 |
| Local time | 12:33 p.m. HST |
| Magnitude | 6.9 Mww |
| Depth | 5.8 km (4 mi) |
| Epicenter | 19.313°N 154.998°W |
| Type | Thrust fault |
| Max. intensity | MMI VIII (Severe) |
| Tsunami | Up to 0.4 m (1.3 ft) in Kapoho. |
| Aftershocks | 15,307 (As of 31 December 2018) |
| Casualties | None |
The earthquake had a maximum strength on the Mercalli intensity scale of VIII (Severe). The earthquake was preceded by a smaller event, measuring 5.4, that was felt across the island and as far away as Oahu.
The earthquake produced a minor tsunami that reached a maximum height of 40 cm (15.7 in.) in Kapoho, 20 cm (7.9 in.) in Hilo and 15 cm (5.9 in.) in Honuapo.