Reviewed by USGSItaly112y ago
M6.0 earthquake 25 km W of San Marco, Italy
Wednesday, July 7, 1915, 16:42:57 UTC · 40.285°N, 14.635°E
A magnitude 6.0 earthquake struck 25 km W of San Marco, Italy on Wednesday, July 7, 1915, 16:42:57 UTC, at a depth of 320.0 km (deep). It is the strongest earthquake within 300 km since an M6.7 on January 13, 1915.
- Magnitude
- 6.0
- Strong · mB
- Depth
- 320 km
- Deep
- 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
15 kilotons of TNT
That is about the energy of the Hiroshima bomb. It released about 32 times the energy of a magnitude 5.0.
Tectonic setting
168 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: deep
320 km
Deep earthquakes (over 300 km) happen deep inside subducting plates. They rarely cause damage, but can be felt faintly over very large distances.
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 12 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.25 km W of San Nicolò, ItalySeptember 8, 1905 · 208 km SE of this epicenter
- 7.1The 1908 Messina, Italy Earthquake and TsunamiDecember 28, 1908 · 268 km S of this epicenter
- 6.74 km WNW of San Benedetto dei Marsi, ItalyJanuary 13, 1915 · 213 km NW of this epicenter
- 6.572 km WSW of Cittadella del Capo, ItalyAugust 1, 1910 · 109 km S of this epicenter
- 5.91 km ENE of Cairano, ItalyJune 7, 1910 · 93 km NE of this epicenter
- 5.95 km NW of Africo Vecchio, ItalyOctober 23, 1907 · 268 km SE of this epicenter
- 5.89 km ESE of Marina di Camerota, ItalyApril 5, 1911 · 79 km SE of this epicenter
- 5.75 km SSE of Sartano, ItalyJune 28, 1913 · 162 km SE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 68 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 189,740 recorded deaths. The most severe:
- 1908M7.0
Messina, Sicily, Calabria
28 Dec 1908 · 249 km away · intensity XI
80,000 deaths$116 million damagetsunami
- 1783M6.9
Tyrrhenian Calabria
5 Feb 1783 · 249 km away · intensity XI
30,000 deathsExtreme damage ($25M+)tsunami
- 1915M7.5
Marsica, Avezzano, Abruzzi
13 Jan 1915 · 213 km away · intensity XI
29,978 deaths$60 million damage
- 1857M6.5
Campania, Potenza
16 Dec 1857 · 116 km away · intensity X
10,000 deathsExtreme damage ($25M+)
- 1703M6.7
L'Aquila (Aquila)
2 Feb 1703 · 271 km away · intensity XI
10,000 deathsSevere damage ($5–24M)tsunami
- 1857
Calabria,Montemurro
16 Sep 1857 · 180 km away
10,000 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.