Reviewed by USGSJapan116y ago
M6.5 earthquake 53 km ESE of Hasaki, Japan
Wednesday, November 8, 1911, 14:11:44 UTC · 35.548°N, 141.381°E
A magnitude 6.5 earthquake struck 53 km ESE of Hasaki, Japan on Wednesday, November 8, 1911, 14:11:44 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.6 on March 22, 1909.
- Magnitude
- 6.5
- 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 earthquake
In context
How big was it, and why here?
Energy released
101 kilotons of TNT
That is about 7 times the Hiroshima bomb. It released about 211 times the energy of a magnitude 5.0.
Tectonic setting
76 km
from the nearest mapped plate boundary, between the Pacific and Okhotsk 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 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 10 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.3190 km SE of Hasaki, JapanSeptember 7, 1906 · 138 km SE of this epicenter
- 7.238 km SSW of Shimoda, JapanOctober 24, 1905 · 267 km SW of this epicenter
- 7.1150 km ESE of Hasaki, JapanMarch 13, 1909 · 96 km E of this epicenter
- 7.082 km ENE of Hasaki, JapanMarch 12, 1909 · 49 km NE of this epicenter
- 6.870 km E of Namie, JapanJanuary 15, 1908 · 230 km N of this epicenter
- 6.6132 km ESE of Iwaki, JapanApril 8, 1906 · 155 km NE of this epicenter
- 6.6227 km ESE of Ishinomaki, JapanMarch 22, 1909 · 299 km NE of this epicenter
- 6.473 km S of Shimoda, JapanSeptember 17, 1906 · 288 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 17 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 13,593 recorded deaths. The most severe:
- 1855M7.0
Tokyo
11 Nov 1855 · 143 km away
6,757 deathsExtreme damage ($25M+)tsunami
- 1703M8.2
Off Sw Boso Peninsula
30 Dec 1703 · 139 km away
5,233 deathsExtreme damage ($25M+)tsunami
- 1828
Sandyo In Etigo
18 Dec 1828 · 275 km away
1,443 deathsExtreme damage ($25M+)tsunami
- 1853
Odawara
11 Mar 1853 · 170 km away
79 deathsSevere damage ($5–24M)
- 1905M7.0
Off Fukushima
6 Jul 1905 · 233 km away
57 deathstsunami
- 1894M7.5
Tokyo
20 Jun 1894 · 135 km away
24 deathsLimited damage (under $1M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.