Reviewed by USGSIndia97y ago
M6.2 earthquake 13 km NW of Imphal, India
Monday, September 22, 1930, 14:19:12 UTC · 24.908°N, 93.862°E
A magnitude 6.2 earthquake struck 13 km NW of Imphal, India on Monday, September 22, 1930, 14:19:12 UTC, at a depth of 35.0 km (shallow). It is the strongest earthquake within 300 km since an M6.2 on April 12, 1917.
- Magnitude
- 6.2
- 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
28 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 59 times the energy of a magnitude 5.0.
Tectonic setting
233 km
from the nearest mapped plate boundary, between the Indian and Eurasian 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 12 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 6.510 km S of Mokokchūng, IndiaMay 12, 1906 · 161 km NE of this epicenter
- 6.596 km SSW of Sarupathar, IndiaMarch 28, 1914 · 258 km E of this epicenter
- 6.221 km SE of Wāngjing, IndiaApril 12, 1917 · 62 km SE of this epicenter
- 6.021 km W of Falam, MyanmarAugust 10, 1923 · 229 km S of this epicenter
- 5.969 km NNE of Mawlaik, MyanmarMarch 15, 1927 · 112 km SE of this epicenter
- 5.892 km WSW of Myitkyina, MyanmarNovember 21, 1926 · 278 km E of this epicenter
- 5.721 km NE of Kolasib, IndiaOctober 23, 1926 · 121 km SW of this epicenter
- 5.628 km ESE of Darlawn, IndiaJuly 11, 1930 · 134 km SW 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 2 recorded deaths. The most severe:
- 1869
Assam: Cachar,Silchar
10 Jan 1869 · 145 km away
2 deathsSevere damage ($5–24M)
- 1918M7.6
Srimangal
8 Jul 1918 · 293 km away
Moderate damage ($1–5M)
- 1846M7.5
India
10 Dec 1846 · 149 km away
- 1868M7.5
Sylhet
30 Jun 1868 · 243 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.