All earthquakes
0.5
very light
EARTHQUAKE DETAILS

3 km South-East of Selva di Progno

14 days ago · 11 Aug, 09:21

A very light earthquake, probably not felt by people. At this depth the shaking is felt, but rarely causes damage.

Stronger than 3% of Italian events in the past year

Where

3 km South-East of Selva di PrognoEarthquakes 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

11 events
Magnitude:lightweakmoderatestrong

The energy released

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

0.1kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×5,623 its energy
M0this quakeM2

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 ≈ 18 s

Animation sped up ~3× compared to reality.

  • Verona
    25 km from the epicentre
    first tremor in ~5 s
    main shaking in ~9 s
  • Vicenza
    31 km from the epicentre
    first tremor in ~6 s
    main shaking in ~10 s
  • Trento
    46 km from the epicentre
    first tremor in ~8 s
    main shaking in ~14 s
  • Padova
    61 km from the epicentre
    first tremor in ~11 s
    main shaking in ~18 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

18 km
medium depth
2 times the height of Mount Everest

At this depth the shaking is felt, but rarely causes damage.

deeper than the area average (~11 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 (M2.0, 1 month ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

2.0
The mainshock
6 km East of Brentonico
1 month ago · 25 Jul, 12:33
Activity in the area right now (30 km radius)
0
last 24 hours
1
last 7 days
8
last 30 days
5 before5 after
nowthis quake
Strongest of the sequence2.0

How often does it happen here?

about every ~33 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 129 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 · 43 km from here
IXDestructive: many buildings partly or fully collapse.
18915.9
Valle d'Illasi earthquake
7 June 1891 · 8 km from here
IXDestructive: many buildings partly or fully collapse.
12225.7
Bresciano-Veronese earthquake
25 December 1222 · 44 km from here
19325.2
Garda orientale earthquake
19 February 1932 · 34 km from here
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

Schio-Vicenza

The epicentre lies about 16 km from Schio-Vicenza, one of the seismic structures mapped by INGV geologists.

estimated maximum magnitude 7.3between 1 and 15 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

1.2
4 km West of Vallarsa
22 km North-West · 12 km
13 days ago
12 Aug, 05:21
1.1
12 days ago
13 Aug, 01:48
0.9
4 km West of Vallarsa
22 km North-West · 11 km
11 days ago
14 Aug, 02:44
0.9
4 km North of Ala
19 km North-West · 10 km
11 days ago
14 Aug, 12:03
1.1
17 days ago
7 Aug, 20:46
1.4
6 km East of Vallarsa
17 km North · 11 km
17 days ago
7 Aug, 20:18
1.0
1 km North-West of Vallarsa
20 km North · 13 km
7 days ago
18 Aug, 19:21
2.0
6 km East of Brentonico
24 km North-West · 15 km
1 month ago
25 Jul, 12:33
1.0
4 km East of Avio
20 km North-West · 10 km
1 month ago
24 Jul, 15:07
1.5
3 km South-East of Brentonico
23 km North-West · 15 km
1 month ago
22 Jul, 13:48

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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