Reviewed by USGS90y ago
M6.4 earthquake in Kermadec Islands region
Saturday, November 13, 1937, 09:50:27 UTC · 31.760°S, 177.877°W
A magnitude 6.4 earthquake struck in Kermadec Islands region on Saturday, November 13, 1937, 09:50:27 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.6 on September 1, 1937.
- Magnitude
- 6.4
- Strong · 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 earthquakeDashed circle: 100 km aftershock search area
In context
How big was it, and why here?
Energy released
58 kilotons of TNT
That is about 4 times the Hiroshima bomb. It released about 122 times the energy of a magnitude 5.0.
Tectonic setting
39 km
from the nearest mapped plate boundary, between the Kermadec and Pacific plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
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 100 km
USGS lists 1 M2.5+ earthquake within 100 km in the following 30 days; the largest was M6.0 on November 13, 1937. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 38 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.21917 Kermadec Islands, New Zealand EarthquakeMay 1, 1917 · 132 km NE of this epicenter
- 7.5Kermadec Islands, New ZealandNovember 16, 1917 · 213 km N of this epicenter
- 7.2Kermadec Islands, New ZealandApril 17, 1919 · 132 km N of this epicenter
- 7.1Kermadec Islands, New ZealandJune 29, 1910 · 120 km NE of this epicenter
- 7.0Kermadec Islands, New ZealandJune 13, 1917 · 277 km N of this epicenter
- 6.9Kermadec Islands, New ZealandJuly 19, 1911 · 224 km N of this epicenter
- 6.6Kermadec Islands, New ZealandJune 29, 1910 · 92 km NE of this epicenter
- 6.6Kermadec Islands, New ZealandDecember 26, 1936 · 119 km N of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 1 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1917M8.0
Kermadec Islands
1 May 1917 · 297 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.