All earthquakes
2.4
light
EARTHQUAKE DETAILS

4 km North of Torri del Benaco

111 months ago · 22 Jul, 11:31

A light earthquake, rarely felt by people. At only a few km deep the shaking is felt more sharply at the surface.

Stronger than 94% of Italian events in the past yearNo. 5 of the year in Veneto

Where

4 km North of Torri del BenacoEarthquakes in the province of VeronaEarthquakes in Veneto

How far away could it be felt?

A quake this small is usually not felt by people: only seismographs record it.

Statistical estimate from the Italian intensity attenuation model (INGV): actual perception depends on geology, buildings and depth. Very shallow events can be felt locally even below the threshold.

Earthquake map

10 events
Magnitude:lightweakmoderatestrong

The energy released

How much energy this quake unleashed, translated into everyday comparisons.

60kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×7.9 its energy
M1this quakeM3

Each extra magnitude unit releases about 32 times more energy: an M5 is not "a bit stronger" than an M4 — it is a different league.

Energy estimated with the standard Gutenberg–Richter relation; an average lightning bolt ≈ 1 billion joules. Indicative values.

The race of the seismic waves

Two waves set off from the hypocentre: the faster P wave arrives first with a sharp jolt; the S wave carries the actual shaking.

P waves — the first sharp jolt (~6 km/s)S waves — the strongest shaking (~3.5 km/s)
t ≈ 19 s

Animation sped up ~4× compared to reality.

  • Verona
    33 km from the epicentre
    first tremor in ~6 s
    main shaking in ~10 s
  • Brescia
    40 km from the epicentre
    first tremor in ~7 s
    main shaking in ~12 s
  • Trento
    54 km from the epicentre
    first tremor in ~9 s
    main shaking in ~16 s
  • Vicenza
    67 km from the epicentre
    first tremor in ~11 s
    main shaking in ~19 s

Theoretical times with average crustal speeds: real values vary with geology. The gap between P and S waves is what earthquake early-warning systems rely on.

How deep it was born

9 km
shallow

At only a few km deep the shaking is felt more sharply at the surface.

in line with the area average (~10 km)

For the same magnitude, a shallow earthquake is felt much more than a deep one: the energy starts closer to the surface.

What kind of quake is this?

Aftershock

It is an aftershock: it follows a stronger quake (M3.2, 111 months ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

3.2
The mainshock
5 km West of San Zeno di Montagna
111 months ago · 21 Jul, 19:03
Activity in the area right now (30 km radius)
0
last 24 hours
0
last 7 days
4
last 30 days
4 before5 after
this quake
Strongest of the sequence3.2

How often does it happen here?

about every ~30 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 143 events in the last 12 years of the INGV catalogue.

An average computed on the recent past: it tells how used this area is to shaking, not when the next quake will come — earthquakes cannot be predicted.

The great earthquakes in this area's history

Almost a thousand years of catalogues: the strongest documented events within ~50 km.

11176.5
Veronese earthquake
3 January 1117 · 49 km from here
IXDestructive: many buildings partly or fully collapse.
18915.9
Valle d'Illasi earthquake
7 June 1891 · 37 km from here
IXDestructive: many buildings partly or fully collapse.
12225.7
Bresciano-Veronese earthquake
25 December 1222 · 14 km from here
19015.4
Garda occidentale earthquake
30 October 1901 · 18 km from here
VII-VIIIRuinous: partial collapses in ordinary buildings, widespread heavy damage.

Source: Parametric Catalogue of Italian Earthquakes CPTI15 (INGV, CC BY 4.0).

The closest seismic structure

Giudicarie

The epicentre sits above this source area: the deep structure where this area's earthquakes can originate.

estimated maximum magnitude 6.8between 5 and 12 km deep

Faults are mapped to build better and understand the territory: knowing them says nothing about when an earthquake will occur, which remains unpredictable. Source: DISS 3.3 (INGV, CC BY 4.0).

Other quakes in the area

2.2
111 months ago
22 Jul, 11:18
2.2
9 km East of Gargnano
2 km North · 5 km
111 months ago
22 Jul, 21:59
3.2
5 km West of San Zeno di Montagna
1 km North-West · 10 km
111 months ago
21 Jul, 19:03
2.5
1 km East of Vallio Terme
24 km West · 6 km
111 months ago
23 Jul, 20:07
1.0
1 km West of Paitone
27 km West · 10 km
111 months ago
23 Jul, 20:18
1.1
111 months ago
25 Jul, 14:41
1.0
4 km West of Verona
30 km South-East · 13 km
111 months ago
25 Jul, 23:19
1.8
4 km North of Torri del Benaco
1 km North-West · 8 km
111 months ago
7 Jul, 02:41
1.5
5 km East of Brentonico
29 km North-East · 10 km
111 months ago
5 Jul, 23:40

Data: INGV — National Institute of Geophysics and Volcanology (CC-BY 4.0)

Estimates computed by Meteare on INGV data (Gutenberg–Richter relation; Italian macroseismic intensity attenuation model).

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