Earthquake · Indonesia
M6.9 earthquake near Pematangsiantar, Indonesia
A magnitude 6.9 earthquake struck 9 km WNW of Pematangsiantar, Indonesia on 15 August 2026 at 10:54 UTC, at a depth of 175 km.
- Magnitude
- 6.9 mww
- When
- 15 August 2026, 10:54 UTC
- Depth
- 175 km
- Location
- 2.99° N, 98.99° E
- Strongest shaking (estimated)
- Intensity V (moderate)
- Felt reports
- 44 people told USGS they felt it
- USGS PAGER alert
- Green
- Source
- USGS event page
What it means
A magnitude 6.9 is a strong earthquake; there are about 130 a year worldwide, and they can cause damage in populated areas near the epicentre. At 175 km deep it was an intermediate-depth earthquake: felt over a wide area, but less strongly than a shallow one of the same size.
The magnitude may be revised as more data comes in. Read Earthquake magnitude explained for what the numbers mean.
Aftershocks
3 earthquakes of magnitude 4 or more within 150 km in the 30 days after; the largest was a magnitude 4.2.
| Mag | Where | When (UTC) |
|---|---|---|
| 4.2 | 7 km SE of Kabanjahe, Indonesia | 25 August 2026, 00:27 |
| 4.1 | 28 km ENE of Sibolga, Indonesia | 12 September 2026, 21:35 |
| 4.0 | 29 km WSW of Ambarita, Indonesia | 25 August 2026, 23:57 |
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