Reviewed by USGSIndonesia77y ago
M6.6 earthquake 9 km NW of Tuban, Indonesia
Monday, June 19, 1950, 12:37:06 UTC · 6.826°S, 112.017°E
A magnitude 6.6 earthquake struck 9 km NW of Tuban, Indonesia on Monday, June 19, 1950, 12:37:06 UTC, at a depth of 45.0 km (shallow). It is the strongest earthquake within 300 km since an M6.9 on September 27, 1937.
- Magnitude
- 6.6
- Strong · mw
- Depth
- 45 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- VII
- Very strong (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
108 kilotons of TNT
That is about 7 times the Hiroshima bomb. It released about 226 times the energy of a magnitude 5.0.
Tectonic setting
418 km
from the nearest mapped plate boundary, between the Sunda and Australian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
45 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 6 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 6.992 km S of Pundong, IndonesiaSeptember 27, 1937 · 279 km SW of this epicenter
- 6.668 km S of Sumberpucung, IndonesiaSeptember 11, 1916 · 219 km S of this epicenter
- 6.1206 km SSW of Banjarmasin, IndonesiaApril 21, 1935 · 287 km NE of this epicenter
- 6.1184 km N of Sumenep, IndonesiaFebruary 28, 1936 · 271 km NE of this epicenter
- 5.878 km SSE of Dampit, IndonesiaJune 20, 1929 · 252 km SE of this epicenter
- 5.86 km SE of Purbalingga, IndonesiaApril 17, 1944 · 295 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 11 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 810 recorded deaths. The most severe:
- 1924
Java: Wonosobo
2 Dec 1924 · 239 km away · intensity IX
727 deathsSevere damage ($5–24M)
- 1924
Java
12 Nov 1924 · 250 km away
60 deaths
- 1950M6.5
Java: Gresik
19 Jun 1950 · 142 km away · intensity VII
16 deathsLimited damage (under $1M)
- 1867
Java: Jogyakarta, Surakarta
10 Jun 1867 · 209 km away · intensity IX
5 deathsSevere damage ($5–24M)tsunami
- 1859
S. Java Sea
20 Oct 1859 · 266 km away
2 deathsLimited damage (under $1M)tsunami
- 1916M7.3
Java
11 Sep 1916 · 265 km away
Severe damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.