Reviewed by USGSIndia101y ago
M5.7 earthquake 21 km NE of Kolasib, India
Saturday, October 23, 1926, 14:30:26 UTC · 24.366°N, 92.822°E
A magnitude 5.7 earthquake struck 21 km NE of Kolasib, India on Saturday, October 23, 1926, 14:30:26 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.9 on September 9, 1923.
- Magnitude
- 5.7
- Moderate · mw
- Depth
- 15 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
5 kilotons of TNT
That is about 1/3 of the Hiroshima bomb. It released about 10 times the energy of a magnitude 5.0.
Tectonic setting
301 km
from the nearest mapped plate boundary, between the Eurasian and Indian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
15 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 75 km
USGS has not published any M2.5+ earthquake within 75 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 6 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.124 km N of Kishorganj, BangladeshJuly 8, 1918 · 207 km W of this epicenter
- 6.99 km NNE of Netrakona, BangladeshSeptember 9, 1923 · 220 km W of this epicenter
- 6.510 km S of Mokokchūng, IndiaMay 12, 1906 · 268 km NE of this epicenter
- 6.221 km SE of Wāngjing, IndiaApril 12, 1917 · 139 km E of this epicenter
- 6.021 km W of Falam, MyanmarAugust 10, 1923 · 178 km S of this epicenter
- 5.625 km ENE of Yairipok, IndiaAugust 18, 1926 · 154 km E of this epicenter
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, which together caused about 1,794 recorded deaths. The most severe:
- 1897M8.0
Assam; Bangladesh
12 Jun 1897 · 280 km away · intensity X
1,542 deathsExtreme damage ($25M+)tsunami
- 1762
Chittagong, Dacca, Arracan
2 Apr 1762 · 276 km away · intensity XI
200 deathsSevere damage ($5–24M)tsunami
- 1923M6.9
Mymensingh
9 Sep 1923 · 220 km away
50 deathsModerate damage ($1–5M)
- 1869
Assam: Cachar,Silchar
10 Jan 1869 · 36 km away
2 deathsSevere damage ($5–24M)
- 1918M7.6
Srimangal
8 Jul 1918 · 185 km away
Moderate damage ($1–5M)
- 1846M7.5
India
10 Dec 1846 · 183 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.