Reported by EMSCPhilippines27d ago
M3.3 earthquake in Mindanao, Philippines
Monday, August 31, 2026, 03:16:11 UTC · 5.710°N, 126.270°E
A magnitude 3.3 earthquake struck in Mindanao, Philippines on Monday, August 31, 2026, 03:16:11 UTC, at a depth of 11.0 km (shallow).
- Magnitude
- 3.3
- Minor · m
- Depth
- 11 km
- Shallow
- Reported by
- EMSC
- Agency PIVS
- Nearest tracker
- 129 km
- from General Santos
Outlined circle: this earthquakeDashed circle: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
1 tons of TNT
That is about 1/11,203 of the Hiroshima bomb. A magnitude 5.0 releases about 355 times more energy.
Tectonic setting
131 km
from the nearest mapped plate boundary, between the Philippine Sea and Sunda plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
11 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
After the main event
Aftershocks within 50 km
USGS and EMSC list 9 M2.5+ earthquakes within 50 km since this event; the largest was M4.3 on August 31, 2026. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 3.3Mindanao, Philippines5d ago · 48 km E of this epicenter
- 3.0Mindanao, Philippines10d ago · 43 km NE of this epicenter
- 3.6Mindanao, Philippines10d ago · 44 km W of this epicenter
- 3.0Mindanao, Philippines18d ago · 41 km NW of this epicenter
- 3.2Mindanao, Philippines20d ago · 41 km S of this epicenter
- 3.3Mindanao, Philippines21d ago · 35 km S of this epicenter
- 3.3Mindanao, Philippines23d ago · 27 km N of this epicenter
- 4.367 km ESE of Caburan, Philippines27d ago · 14 km SW of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 2,119 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.31918 Mindanao, Philippines EarthquakeAugust 15, 1918 · 253 km W of this epicenter
- 8.11924 Mindanao, Philippines EarthquakeApril 14, 1924 · 102 km N of this epicenter
- 8.01972 Mindanao, Philippines EarthquakeDecember 2, 1972 · 91 km NE of this epicenter
- 7.919 km WNW of Palimbang, PhilippinesAugust 16, 1976 · 256 km W of this epicenter
- 7.947 km ESE of Kalbay, PhilippinesMarch 14, 1913 · 46 km SW of this epicenter
- 7.825 km SW of Kablalan, PhilippinesJune 7, 2026 · 135 km W of this epicenter
- 7.877 km E of Baculin, PhilippinesMay 25, 1943 · 216 km NE of this epicenter
- 7.8161 km SE of Sarangani, PhilippinesApril 1, 1936 · 161 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 54 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 11,295 recorded deaths. The most severe:
- 1976M8.0
Mindanao: S
16 Aug 1976 · 250 km away · intensity VI
8,000 deaths$134 million damagetsunami
- 1856
Sangihe Pulau (Volcanic)
2 Mar 1856 · 242 km away
2,806 deathsSevere damage ($5–24M)tsunami
- 1913M7.8
Sangihe Island
14 Mar 1913 · 43 km away · intensity IX
138 deathsModerate damage ($1–5M)tsunami
- 2026M7.8
Mindanao: S; Indonesia
7 Jun 2026 · 136 km away · intensity VIII
107 deaths$25 million damagetsunami
- 1928M7.4
Cotabato,N Coast Of Illana Bay
19 Dec 1928 · 250 km away · intensity VII
97 deathsModerate damage ($1–5M)tsunami
- 1918M8.3
Mindanao: Cotabato
15 Aug 1918 · 253 km away · intensity X
52 deathsSevere damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.