Reviewed by USGSJapan94y ago
M5.1 earthquake 214 km E of Miyako, Japan
Tuesday, March 14, 1933, 16:04:44 UTC · 39.688°N, 144.445°E
A magnitude 5.1 earthquake struck 214 km E of Miyako, Japan on Tuesday, March 14, 1933, 16:04:44 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M5.8 on March 12, 1933.
- Magnitude
- 5.1
- Moderate · 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 earthquakeDashed circle: 75 km aftershock search area
In context
How big was it, and why here?
Energy released
722 tons of TNT
That is about 1/21 of the Hiroshima bomb. It released about 2 times the energy of a magnitude 5.0.
Tectonic setting
19 km
from the nearest mapped plate boundary, between the Pacific and Okhotsk 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 75 km
USGS lists 2 M2.5+ earthquakes within 75 km in the following 30 days; the largest was M6.7 on April 9, 1933. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 111 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.41933 Sanriku (Sanriku-oki) Earthquake, JapanMarch 2, 1933 · 55 km S of this epicenter
- 7.978 km E of Hachinohe, JapanMarch 9, 1931 · 199 km NW of this epicenter
- 7.7277 km SSE of Kushiro, JapanMay 3, 1919 · 147 km NE of this epicenter
- 7.7217 km ESE of Kamaishi, JapanJuly 6, 1905 · 144 km S of this epicenter
- 7.6119 km SE of Kamaishi, JapanNovember 1, 1915 · 169 km SW of this epicenter
- 7.5Near the east coast of Honshu, JapanAugust 9, 1901 · 209 km NW of this epicenter
- 7.379 km ENE of Miyako, JapanMay 27, 1928 · 140 km W of this epicenter
- 7.2Near the east coast of Honshu, JapanAugust 9, 1901 · 188 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 32 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 31,184 recorded deaths. The most severe:
- 1896M8.3
Sanriku
15 Jun 1896 · 43 km away
27,122 deathsExtreme damage ($25M+)tsunami
- 1933M8.4
Sanriku
2 Mar 1933 · 55 km away
3,022 deathsExtreme damage ($25M+)tsunami
- 1793M8.3
Sanriku,Rikuzen,Rikuchu
17 Feb 1793 · 138 km away
745 deathsSevere damage ($5–24M)tsunami
- 1896
Senhoku, Ugo
31 Aug 1896 · 296 km away
206 deathsExtreme damage ($25M+)
- 1843M8.4
Hokkaido: Yezo, Kushiro, Nemuro
25 Apr 1843 · 288 km away
45 deathsModerate damage ($1–5M)tsunami
- 1856M8.0
Oshima
23 Aug 1856 · 121 km away · intensity V
26 deathsModerate damage ($1–5M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.