Reviewed by USGSIndonesia102y ago
M6.7 earthquake 177 km SSW of Pagar Alam, Indonesia
Thursday, October 22, 1925, 17:01:43 UTC · 5.551°S, 102.764°E
A magnitude 6.7 earthquake struck 177 km SSW of Pagar Alam, Indonesia on Thursday, October 22, 1925, 17:01:43 UTC, at a depth of 35.0 km (shallow). It is the strongest earthquake within 300 km since an M6.7 on April 15, 1916.
- Magnitude
- 6.7
- Strong · mw
- Depth
- 35 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- V
- Moderate (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
142 kilotons of TNT
That is about 9 times the Hiroshima bomb. It released about 299 times the energy of a magnitude 5.0.
Tectonic setting
149 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 15 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.573 km WSW of Bengkulu, IndonesiaJune 25, 1914 · 212 km NW of this epicenter
- 6.769 km SSE of Bengkulu, IndonesiaApril 15, 1916 · 136 km N of this epicenter
- 6.5104 km WSW of Bengkulu, IndonesiaOctober 12, 1919 · 200 km NW of this epicenter
- 6.5271 km S of Pagar Alam, IndonesiaMarch 3, 1921 · 105 km S of this epicenter
- 6.4200 km SW of Bandar Lampung, IndonesiaOctober 4, 1907 · 195 km SE of this epicenter
- 6.3174 km SSW of Pagar Alam, IndonesiaFebruary 13, 1918 · 15 km E of this epicenter
- 6.385 km SSW of Kotabumi, IndonesiaApril 2, 1919 · 191 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 4 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 20 recorded deaths. The most severe:
- 1914M7.6
Sumatera
25 Jun 1914 · 209 km away
20 deathsLimited damage (under $1M)tsunami
- 1770M7.0
Sumatra:
1770 · 104 km away
Severe damage ($5–24M)tsunami
- 1818M7.0
Sumatra: Bengkulu
18 Mar 1818 · 222 km away · intensity IX
Limited damage (under $1M)tsunami
- 1896M6.8
Sw. Sumatra, Java
10 Oct 1896 · 230 km away
Limited damage (under $1M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.