A magnitude 5.1 earthquake struck the Solomon Islands at 13:42:11 UTC on August 6, 2026, which was 00:42 on August 7 at the epicenter, according to data from the US Geological Survey’s National Earthquake Information Center. The Global Disaster Alert and Coordination System, a framework run by the United Nations, the European Commission and disaster managers, listed it as a green event.
The quake sat 110 km west of Buala, on Isabel island, at a depth of 54.348 km. USGS put the epicenter at latitude -8.0025 and longitude 158.5995.. Honiara is 217.1 km to the southeast, and the quake lay 224.0 km north-northwest of Malango on Guadalcanal. Farther west, Arawa in Bougainville, Papua New Guinea, was 388.2 km away. The USGS estimate for people living within 100 km was zero.
A busy subduction zone
The islands sit on the edge of one of the planet’s more active plate boundaries. USGS describes the Australia-Pacific boundary on the northern margin as more than 4000 km long, running from the Java trench in the west to the Solomon Islands in the east. Along the South Solomon trench the Australia plate pushes against the Pacific plate at about 95 mm a year, heading east-northeast.
Large earthquakes there are common. USGS counts 13 of magnitude 7.5 or greater along that section since 1900. The worst recent one came on April 1, 2007, a magnitude 8.1 megathrust earthquake at the western end of the trench. It set off a tsunami and killed at least 40 people. The agency says it was the third magnitude 8.1 megathrust event tied to this subduction zone in a century, after earlier ones in 1939 and 1977.
By comparison, a 5.1 is a modest shake. The data available for this event carries no word on damage or injuries.
Sources
- Overall Green Earthquake in Solomon Islands on 06 Aug 2026 13:42 UTC
- Earthquake M5.1 Buala, Solomon Islands (Aug 6, 2026)
