Reviewed by USGSJapan113y ago
M7.0 earthquake 152 km NW of Uken, Japan
Saturday, July 4, 1914, 17:48:29 UTC · 29.201°N, 128.052°E
A magnitude 7.0 earthquake struck 152 km NW of Uken, Japan on Saturday, July 4, 1914, 17:48:29 UTC, at a depth of 235.0 km (intermediate). It is the strongest earthquake within 300 km since an M7.9 on June 15, 1911.
- Magnitude
- 7.0
- Major · ms
- Depth
- 235 km
- Intermediate
- 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
477 kilotons of TNT
That is about 32 times the Hiroshima bomb. It released about 1,000 times the energy of a magnitude 5.0.
Tectonic setting
57 km
from the nearest mapped plate boundary, between the Yangtze and Okinawa plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: intermediate
235 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
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 200 km
USGS has not published any M2.5+ earthquake within 200 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 6 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 · 73 km E of this epicenter
- 7.2Ryukyu Islands, JapanJune 24, 1901 · 232 km SE of this epicenter
- 6.546 km SE of Koshima, JapanMarch 10, 1909 · 285 km E of this epicenter
- 6.367 km WNW of Naze, JapanJuly 4, 1914 · 105 km SE of this epicenter
- 6.1134 km NW of Naze, JapanMarch 3, 1913 · 54 km E of this epicenter
- 5.868 km N of Naze, JapanSeptember 10, 1909 · 133 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 2 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 12 recorded deaths. The most severe:
- 1911M8.0
Ryukyu Islands
15 Jun 1911 · 232 km away
12 deathsSevere damage ($5–24M)tsunami
- 1904M7.9
Kyushu
24 Aug 1904 · 208 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.