Reviewed by USGSJapan113y ago
M6.3 earthquake 67 km WNW of Naze, Japan
Saturday, July 4, 1914, 17:47:58 UTC · 28.550°N, 128.829°E
A magnitude 6.3 earthquake struck 67 km WNW of Naze, Japan on Saturday, July 4, 1914, 17:47:58 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M7.9 on June 15, 1911.
- Magnitude
- 6.3
- 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
41 kilotons of TNT
That is about 3 times the Hiroshima bomb. It released about 86 times the energy of a magnitude 5.0.
Tectonic setting
31 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: 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 7 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 · 66 km N of this epicenter
- 7.2Ryukyu Islands, JapanJune 24, 1901 · 130 km SE of this epicenter
- 7.012 km SE of Ginowan, JapanFebruary 23, 1911 · 280 km S of this epicenter
- 6.546 km SE of Koshima, JapanMarch 10, 1909 · 251 km NE of this epicenter
- 6.219 km SE of Ginowan, JapanAugust 29, 1909 · 285 km S of this epicenter
- 6.1134 km NW of Naze, JapanMarch 3, 1913 · 86 km N of this epicenter
- 5.868 km N of Naze, JapanSeptember 10, 1909 · 74 km NE 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 12 recorded deaths. The most severe:
- 1911M8.0
Ryukyu Islands
15 Jun 1911 · 130 km away
12 deathsSevere damage ($5–24M)tsunami
- 1901M7.9
Ryukyu Islands
24 Jun 1901 · 207 km away
Limited damage (under $1M)tsunami
- 1768M6.5
Ryukyu Islands
22 Jul 1768 · 292 km away
Limited damage (under $1M)tsunami
- 1904M7.9
Kyushu
24 Aug 1904 · 197 km away
- 1853
Okinawa
3 Oct 1853 · 288 km away
tsunami
- 1858
Ryukyu Islands
Sep 1858 · 292 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.