Reviewed by USGSPhilippines117y ago
M6.8 earthquake 37 km E of Lamitan, Philippines
Monday, March 6, 1911, 17:30:03 UTC · 6.024°N, 126.037°E
A magnitude 6.8 earthquake struck 37 km E of Lamitan, Philippines on Monday, March 6, 1911, 17:30:03 UTC, at a depth of 100.0 km (intermediate). It is the strongest earthquake within 300 km since an M7.6 on December 16, 1910.
- Magnitude
- 6.8
- Strong · ms
- Depth
- 100 km
- Intermediate
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquake
In context
How big was it, and why here?
Energy released
239 kilotons of TNT
That is about 16 times the Hiroshima bomb. It released about 501 times the energy of a magnitude 5.0.
Tectonic setting
142 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: intermediate
100 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
Did You Feel It?
Where it was felt
No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.
I felt it — report to USGS ↗USGS PAGER estimate
Who was exposed to shaking
USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.
After the main event
Aftershocks within 100 km
USGS has not published any M2.5+ earthquake within 100 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 4 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 11 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 2,810 recorded deaths. The most severe:
- 1856
Sangihe Pulau (Volcanic)
2 Mar 1856 · 268 km away
2,806 deathsSevere damage ($5–24M)tsunami
- 1870
Mindanao: Davao,Blanco
4 Nov 1870 · 129 km away
4 deathsModerate damage ($1–5M)
- 1871
W Mindanao: Cotabato,Polloc Harbor
8 Dec 1871 · 254 km away · intensity IX
Severe damage ($5–24M)
- 1903M7.8
Davao Gulf
28 Dec 1903 · 109 km away · intensity VIII
Moderate damage ($1–5M)
- 1878
Near Mount Apo
16 Sep 1878 · 142 km away · intensity VII
Moderate damage ($1–5M)
- 1893
E Mindanao: Agusan River
21 Jun 1893 · 101 km away · intensity X
Moderate damage ($1–5M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.