Reviewed by USGSItaly97y ago
M6.0 earthquake 28 km NNE of Montignano-Marzocca, Italy
Thursday, October 30, 1930, 07:13:10 UTC · 43.890°N, 13.483°E
A magnitude 6.0 earthquake struck 28 km NNE of Montignano-Marzocca, Italy on Thursday, October 30, 1930, 07:13:10 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.0 on March 27, 1928.
- Magnitude
- 6.0
- 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 earthquake
In context
How big was it, and why here?
Energy released
14 kilotons of TNT
That is about the energy of the Hiroshima bomb. It released about 30 times the energy of a magnitude 5.0.
Tectonic setting
557 km
from the nearest mapped plate boundary, between the Eurasian and African 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 75 km
USGS has not published any M2.5+ earthquake within 75 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 57 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 6.74 km WNW of San Benedetto dei Marsi, ItalyJanuary 13, 1915 · 208 km S of this epicenter
- 6.32 km SW of Molazzana, ItalySeptember 7, 1920 · 248 km W of this epicenter
- 6.21 km NNW of Vicchio, ItalyJune 29, 1919 · 163 km W of this epicenter
- 6.019 km NNE of Gabicce Mare, ItalyMay 17, 1916 · 58 km NW of this epicenter
- 6.015 km NNE of Pesaro, ItalyAugust 16, 1916 · 41 km NW of this epicenter
- 6.04 km SE of Zuglio, ItalyMarch 27, 1928 · 284 km N of this epicenter
- 6.07 km ESE of Pokupsko, CroatiaOctober 8, 1909 · 270 km NE of this epicenter
- 5.97 km NE of Novi Vinodolski, CroatiaMarch 12, 1916 · 180 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 85 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 83,466 recorded deaths. The most severe:
- 1703
Central Apennino, Norcia, L'Aquila, Perugia
14 Jan 1703 · 127 km away · intensity XI
40,000 deathsExtreme damage ($25M+)
- 1915M7.5
Marsica, Avezzano, Abruzzi
13 Jan 1915 · 210 km away · intensity XI
29,978 deaths$60 million damage
- 1703M6.7
L'Aquila (Aquila)
2 Feb 1703 · 160 km away · intensity XI
10,000 deathsSevere damage ($5–24M)tsunami
- 1920M5.8
Carrara,Garfagnana
7 Sep 1920 · 258 km away · intensity X
1,400 deaths
- 1706
Sulmona To Campobasso, Abruzzi
3 Nov 1706 · 270 km away · intensity X
1,000 deathsSevere damage ($5–24M)
- 1789
Citta Di Castello,Sansepolcro
30 Sep 1789 · 112 km away · intensity X
500 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.