Reviewed by USGSIndonesia114y ago
M6.6 earthquake 79 km WSW of Labuan, Indonesia
Wednesday, August 13, 1913, 04:25:42 UTC · 6.746°S, 105.213°E
A magnitude 6.6 earthquake struck 79 km WSW of Labuan, Indonesia on Wednesday, August 13, 1913, 04:25:42 UTC, at a depth of 35.0 km (shallow). No earthquake of this size or larger appears within 300 km in the USGS catalog since 1900.
- Magnitude
- 6.6
- Strong · mw
- Depth
- 35 km
- Shallow
- 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
133 kilotons of TNT
That is about 9 times the Hiroshima bomb. It released about 279 times the energy of a magnitude 5.0.
Tectonic setting
172 km
from the nearest mapped plate boundary, between the Sunda and Australian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
35 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.
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 3 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 7 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1834
Java: Bogor, Cinajur
10 Oct 1834 · 197 km away · intensity IX
Severe damage ($5–24M)
- 1900
Java: Sukabumi
14 Jan 1900 · 193 km away · intensity VII
Moderate damage ($1–5M)
- 1852M6.5
Java: Djakarta; Sumatra: Telukbetung
9 Jan 1852 · 42 km away · intensity VIII
Limited damage (under $1M)tsunami
- 1903M8.1
S Of Java
27 Feb 1903 · 164 km away
- 1757M7.5
Jakarta
24 Aug 1757 · 214 km away
tsunami
- 1722
Java: Djakarta (Jakarta)
Oct 1722 · 190 km away · intensity IX
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.