Reviewed by USGSJapan115y ago
M6.7 earthquake 68 km SW of Yonakuni, Japan
Tuesday, January 7, 1913, 22:51:16 UTC · 24.106°N, 122.457°E
A magnitude 6.7 earthquake struck 68 km SW of Yonakuni, Japan on Tuesday, January 7, 1913, 22:51:16 UTC, at a depth of 35.0 km (shallow). It is the strongest earthquake within 300 km since an M6.9 on November 14, 1910.
- 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
147 kilotons of TNT
That is about 10 times the Hiroshima bomb. It released about 309 times the energy of a magnitude 5.0.
Tectonic setting
35 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 15 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.11910 Taiwan EarthquakeApril 12, 1910 · 278 km NE of this epicenter
- 7.2108 km E of Hengchun, TaiwanJanuary 11, 1908 · 236 km S of this epicenter
- 7.012 km N of Pizitou, TaiwanApril 13, 1906 · 211 km W of this epicenter
- 6.910 km NE of Pizitou, TaiwanMarch 16, 1906 · 207 km W of this epicenter
- 6.9136 km S of Hualien City, TaiwanNovember 14, 1910 · 163 km SW of this epicenter
- 6.813 km ENE of Hualien City, TaiwanNovember 21, 1909 · 74 km W of this epicenter
- 6.8TaiwanSeptember 1, 1910 · 150 km N of this epicenter
- 6.73 km WSW of Banqiao, TaiwanApril 14, 1909 · 143 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 26 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 61,777 recorded deaths. The most severe:
- 1782
Tainan
22 May 1782 · 203 km away
40,000 deathsSevere damage ($5–24M)tsunami
- 1771M7.4
Ryukyu Islands
24 Apr 1771 · 188 km away
13,486 deathsExtreme damage ($25M+)tsunami
- 1721
Tainan
1721 · 261 km away
2,000 deathsExtreme damage ($25M+)tsunami
- 1862M6.5
Tainan
6 Jun 1862 · 262 km away · intensity VIII
2,000 deathsSevere damage ($5–24M)
- 1906M6.8
Jiayi
16 Mar 1906 · 207 km away
1,258 deathsSevere damage ($5–24M)
- 1848M6.8
Zhanghua
3 Dec 1848 · 199 km away · intensity IX
1,001 deathsExtreme damage ($25M+)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.