Reviewed by USGSJapan73y ago
M6.0 earthquake 149 km SE of Katsuura, Japan
Friday, November 27, 1953, 11:30:08 UTC · 34.196°N, 141.467°E
A magnitude 6.0 earthquake struck 149 km SE of Katsuura, Japan on Friday, November 27, 1953, 11:30:08 UTC, at a depth of 27.5 km (shallow). It is the strongest earthquake within 300 km since an M6.7 on November 26, 1953.
- Magnitude
- 6.0
- Moderate · mw
- Depth
- 28 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: 75 km aftershock search area
In context
How big was it, and why here?
Energy released
13 kilotons of TNT
That is about the energy of the Hiroshima bomb. It released about 27 times the energy of a magnitude 5.0.
Tectonic setting
16 km
from the nearest mapped plate boundary, between the Okhotsk and Philippine Sea plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
28 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 lists 3 M2.5+ earthquakes within 75 km in the following 30 days; the largest was M6.2 on December 20, 1953. 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 194 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.05 km SSE of Ōiso, JapanSeptember 1, 1923 · 228 km NW of this epicenter
- 7.9174 km SE of Katsuura, JapanNovember 25, 1953 · 26 km SE of this epicenter
- 7.85 km E of Tateyama, JapanSeptember 2, 1923 · 166 km NW of this epicenter
- 7.769 km ESE of Kitaibaraki, JapanMay 23, 1938 · 260 km N of this epicenter
- 7.3190 km SE of Hasaki, JapanSeptember 7, 1906 · 116 km NE of this epicenter
- 7.264 km ENE of Hasaki, JapanJune 1, 1923 · 194 km N of this epicenter
- 7.238 km SSW of Shimoda, JapanOctober 24, 1905 · 241 km W of this epicenter
- 7.196 km ESE of Takahagi, JapanApril 11, 1943 · 235 km N of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 25 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 117,771 recorded deaths. The most severe:
- 1923M7.9
Tokyo, Yokohama
1 Sep 1923 · 206 km away
105,385 deaths$600 million damagetsunami
- 1855M7.0
Tokyo
11 Nov 1855 · 222 km away
6,757 deathsExtreme damage ($25M+)tsunami
- 1703M8.2
Off Sw Boso Peninsula
30 Dec 1703 · 161 km away
5,233 deathsExtreme damage ($25M+)tsunami
- 1930M7.1
Honshu: Idu
25 Nov 1930 · 243 km away
259 deathsExtreme damage ($25M+)
- 1853
Odawara
11 Mar 1853 · 231 km away
79 deathsSevere damage ($5–24M)
- 1894M7.5
Tokyo
20 Jun 1894 · 220 km away
24 deathsLimited damage (under $1M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.