Reviewed by USGSIndonesia104y ago
M6.3 earthquake 62 km S of Waingapu, Indonesia
Monday, October 15, 1923, 07:58:00 UTC · 10.218°S, 120.257°E
A magnitude 6.3 earthquake struck 62 km S of Waingapu, Indonesia on Monday, October 15, 1923, 07:58:00 UTC, at a depth of 35.0 km (shallow). It is the strongest earthquake within 300 km since an M6.3 on October 15, 1923.
- Magnitude
- 6.3
- Strong · mw
- Depth
- 35 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- VI
- Strong (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
46 kilotons of TNT
That is about 3 times the Hiroshima bomb. It released about 95 times the energy of a magnitude 5.0.
Tectonic setting
82 km
from the nearest mapped plate boundary, between the Sunda and Timor plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
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 2 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 3 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1836M7.5
Flores Sea
28 Nov 1836 · 273 km away
Limited damage (under $1M)tsunami
- 1837
Sumbawa Island: Bima
28 Nov 1837 · 271 km away · intensity IX
Limited damage (under $1M)
- 1836
Flores Sea
5 Mar 1836 · 273 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.