Reviewed by USGSJapan113y ago
M6.7 earthquake 86 km SE of Koshima, Japan
Saturday, November 28, 1914, 10:45:41 UTC · 29.594°N, 131.049°E
A magnitude 6.7 earthquake struck 86 km SE of Koshima, Japan on Saturday, November 28, 1914, 10:45:41 UTC, at a depth of 35.0 km (shallow). It is the strongest earthquake within 300 km since an M7.0 on July 4, 1914.
- Magnitude
- 6.7
- Strong · mw
- Depth
- 35 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
194 kilotons of TNT
That is about 13 times the Hiroshima bomb. It released about 407 times the energy of a magnitude 5.0.
Tectonic setting
72 km
from the nearest mapped plate boundary, between the Okinawa and Philippine Sea plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
35 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 11 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.9108 km NW of Naze, JapanJune 15, 1911 · 223 km W of this epicenter
- 7.229 km ESE of Takanabe, JapanApril 13, 1913 · 280 km N of this epicenter
- 7.2Ryukyu Islands, JapanJune 24, 1901 · 205 km SW of this epicenter
- 7.161 km ESE of Nishinoomote, JapanAugust 24, 1904 · 109 km NE of this epicenter
- 7.0152 km NW of Uken, JapanJuly 4, 1914 · 294 km W of this epicenter
- 6.88 km NNE of Kajiki, JapanJanuary 12, 1914 · 249 km N of this epicenter
- 6.7120 km E of Nishinoomote, JapanJanuary 5, 1913 · 173 km NE of this epicenter
- 6.546 km SE of Koshima, JapanMarch 10, 1909 · 41 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 6 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 75 recorded deaths. The most severe:
- 1914M7.1
Sakurijima
12 Jan 1914 · 224 km away
63 deaths$19 million damagetsunami
- 1911M8.0
Ryukyu Islands
15 Jun 1911 · 205 km away
12 deathsSevere damage ($5–24M)tsunami
- 1899M7.1
Seikaido
24 Nov 1899 · 272 km away
Limited damage (under $1M)tsunami
- 1904M7.9
Kyushu
24 Aug 1904 · 111 km away
- 1909M7.9
Kyushu
10 Nov 1909 · 268 km away
- 1899
Seikaido, Japan
25 Nov 1899 · 272 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.