Reviewed by USGSJapan120y ago
M6.0 earthquake 84 km W of Noshiro, Japan
Monday, August 5, 1907, 01:55:57 UTC · 40.320°N, 139.048°E
A magnitude 6.0 earthquake struck 84 km W of Noshiro, Japan on Monday, August 5, 1907, 01:55:57 UTC, at a depth of 20.0 km (shallow). It is the strongest earthquake within 300 km since an M6.6 on March 26, 1907.
- Magnitude
- 6.0
- Strong · mw
- Depth
- 20 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
17 kilotons of TNT
That is about the energy of the Hiroshima bomb. It released about 36 times the energy of a magnitude 5.0.
Tectonic setting
33 km
from the nearest mapped plate boundary, between the Okhotsk and Amur plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
20 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 4 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.5Near the east coast of Honshu, JapanAugust 9, 1901 · 277 km E of this epicenter
- 7.2Near the east coast of Honshu, JapanAugust 9, 1901 · 293 km E of this epicenter
- 7.0Northern Honshu, JapanMay 11, 1900 · 252 km SE of this epicenter
- 6.690 km WNW of Sado, JapanMarch 26, 1907 · 258 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 16 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 3,333 recorded deaths. The most severe:
- 1766M6.9
Hirosaki
8 Mar 1766 · 154 km away
1,700 deathsSevere damage ($5–24M)tsunami
- 1894M7.0
Syonai
22 Oct 1894 · 171 km away
726 deathsSevere damage ($5–24M)tsunami
- 1804M7.3
Kisakata
10 Jul 1804 · 161 km away
450 deathsExtreme damage ($25M+)tsunami
- 1896
Senhoku, Ugo
31 Aug 1896 · 170 km away
206 deathsExtreme damage ($25M+)
- 1833M7.4
Honshu: Nw
7 Dec 1833 · 158 km away
85 deathsSevere damage ($5–24M)tsunami
- 1810M6.6
Oga
25 Sep 1810 · 86 km away
59 deathsSevere damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.