All earthquakes
1.0
very light
EARTHQUAKE DETAILS

3 km West of Malé

1 month ago · 15 Jul, 12:05

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

Stronger than 30% of Italian events in the past year

Where

3 km West of MaléEarthquakes in the province of TrentoEarthquakes in Trentino-Alto Adige

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.

0.5kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×1,000 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 ≈ 30 s

Animation sped up ~6× compared to reality.

  • Trento
    39 km from the epicentre
    first tremor in ~7 s
    main shaking in ~12 s
  • Bolzano
    42 km from the epicentre
    first tremor in ~7 s
    main shaking in ~12 s
  • Verona
    102 km from the epicentre
    first tremor in ~17 s
    main shaking in ~29 s
  • Vicenza
    104 km from the epicentre
    first tremor in ~17 s
    main shaking in ~30 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

10 km
medium depth
1.1 times the height of Mount Everest

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

in line with the area average (~6 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 (M2.1, 1 month ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

2.1
The mainshock
4 km South-West of Peio
1 month ago · 14 Jul, 16:33
Activity in the area right now (30 km radius)
0
last 24 hours
1
last 7 days
5
last 30 days
4 before6 after
this quake
Strongest of the sequence2.1

How often does it happen here?

about every ~3 months

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 41 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.

20014.8
Val Venosta earthquake
17 July 2001 · 42 km from here
VIStrong: felt by everyone, many get scared; objects fall, first light damage to buildings.
19994.8
Alpi Retiche earthquake
29 December 1999 · 48 km from here
V-VIStrong: felt by everyone, many get scared; objects fall, first light damage to buildings.
19314.8
Valli Giudicarie earthquake
14 April 1931 · 45 km from here
VIStrong: felt by everyone, many get scared; objects fall, first light damage to buildings.
19074.8
Alpi Retiche earthquake
20 April 1907 · 34 km from here
VIStrong: felt by everyone, many get scared; objects fall, first light damage to buildings.

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

The closest seismic structure

Giudicarie

The epicentre lies about 25 km from Giudicarie, one of the seismic structures mapped by INGV geologists.

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

1.3
5 km West of Pellizzano
20 km West · 9 km
1 month ago
14 Jul, 16:37
2.1
4 km South-West of Peio
20 km West · 10 km
1 month ago
14 Jul, 16:33
1.1
12 km North of Peio
20 km North-West · 10 km
1 month ago
20 Jul, 03:30
1.4
8 km North of Peio
19 km West · 12 km
1 month ago
25 Jul, 16:04
0.7
7 km East of Martello
19 km North · 10 km
28 days ago
28 Jul, 12:14
1.3
5 km West of Bresimo
7 km North · 10 km
2 months ago
29 Jun, 10:04
0.6
4 km West of Malé
2 km North-West · 11 km
21 days ago
4 Aug, 01:31
1.5
7 km West of Ultimo
16 km North · 11 km
14 days ago
11 Aug, 05:15
0.8
3 km North of Commezzadura
2 km South-West · 11 km
2 months ago
18 Jun, 01:00
0.6
5 km East of Martello
19 km North-West · 11 km
13 days ago
12 Aug, 06:10

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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