Reviewed by USGSBulgaria122y ago
M6.1 earthquake 15 km NE of Bobov Dol, Bulgaria
Sunday, October 8, 1905, 07:27:37 UTC · 42.461°N, 23.143°E
A magnitude 6.1 earthquake struck 15 km NE of Bobov Dol, Bulgaria on Sunday, October 8, 1905, 07:27:37 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.2 on August 4, 1905.
- Magnitude
- 6.1
- 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
23 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 48 times the energy of a magnitude 5.0.
Tectonic setting
289 km
from the nearest mapped plate boundary, between the Aegean Sea and Eurasian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
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 6 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.07 km SE of Stara Kresna, BulgariaApril 4, 1904 · 79 km S of this epicenter
- 6.86 km W of Stara Kresna, BulgariaApril 4, 1904 · 73 km S of this epicenter
- 6.24 km ESE of Rrëshen, AlbaniaAugust 4, 1905 · 277 km W of this epicenter
- 5.84 km NE of Makedonski Brod, North MacedoniaApril 30, 1905 · 186 km SW of this epicenter
- 5.415 km NW of Bogomila, North MacedoniaApril 3, 1905 · 169 km SW of this epicenter
- 5.34 km NE of Lezhë, AlbaniaAugust 12, 1905 · 294 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 17 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 140 recorded deaths. The most severe:
- 1905M6.6
Shkoder
1 Jun 1905 · 294 km away · intensity X
120 deaths$24 million damage
- 1905M7.2
Aegean Sea
8 Nov 1905 · 291 km away · intensity X
11 deathsModerate damage ($1–5M)tsunami
- 1902M6.5
Thessaloniki
5 Jul 1902 · 183 km away · intensity IX
5 deathsModerate damage ($1–5M)tsunami
- 1893
Nw: Popovic
8 Apr 1893 · 249 km away · intensity X
3 deathsSevere damage ($5–24M)
- 1893M6.5
Samothraki
9 Feb 1893 · 293 km away · intensity X
1 deathModerate damage ($1–5M)tsunami
- 1904M7.8
Struma
4 Apr 1904 · 74 km away · intensity XI
Severe damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.