Reviewed by USGSJapan113y ago
M6.1 earthquake 154 km ESE of Hasaki, Japan
Saturday, April 24, 1915, 17:09:14 UTC · 35.299°N, 142.446°E
A magnitude 6.1 earthquake struck 154 km ESE of Hasaki, Japan on Saturday, April 24, 1915, 17:09:14 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.5 on November 8, 1911.
- Magnitude
- 6.1
- 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
24 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 51 times the energy of a magnitude 5.0.
Tectonic setting
20 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 9 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 · 62 km S of this epicenter
- 7.1150 km ESE of Hasaki, JapanMarch 13, 1909 · 6 km SW of this epicenter
- 7.082 km ENE of Hasaki, JapanMarch 12, 1909 · 93 km NW of this epicenter
- 6.870 km E of Namie, JapanJanuary 15, 1908 · 261 km N of this epicenter
- 6.6132 km ESE of Iwaki, JapanApril 8, 1906 · 159 km N of this epicenter
- 6.6227 km ESE of Ishinomaki, JapanMarch 22, 1909 · 270 km NE of this epicenter
- 6.553 km ESE of Hasaki, JapanNovember 8, 1911 · 100 km W of this epicenter
- 6.3116 km ESE of Katsuura, JapanFebruary 24, 1906 · 119 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 13 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 12,150 recorded deaths. The most severe:
- 1855M7.0
Tokyo
11 Nov 1855 · 243 km away
6,757 deathsExtreme damage ($25M+)tsunami
- 1703M8.2
Off Sw Boso Peninsula
30 Dec 1703 · 225 km away
5,233 deathsExtreme damage ($25M+)tsunami
- 1853
Odawara
11 Mar 1853 · 268 km away
79 deathsSevere damage ($5–24M)
- 1905M7.0
Off Fukushima
6 Jul 1905 · 234 km away
57 deathstsunami
- 1894M7.5
Tokyo
20 Jun 1894 · 235 km away
24 deathsLimited damage (under $1M)
- 1835M7.6
Sanriku
20 Jul 1835 · 293 km away
Severe damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.