All earthquakes
1.1
very light
EARTHQUAKE DETAILS

12 km North of Peio

1 month ago · 20 Jul, 03:30

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

Stronger than 39% of Italian events in the past year

Where

12 km North of PeioEarthquakes 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

14 events
Magnitude:lightweakmoderatestrong

The energy released

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

0.7kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×708 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 ≈ 33 s

Animation sped up ~6× compared to reality.

  • Bolzano
    54 km from the epicentre
    first tremor in ~9 s
    main shaking in ~16 s
  • Trento
    58 km from the epicentre
    first tremor in ~10 s
    main shaking in ~17 s
  • Brescia
    110 km from the epicentre
    first tremor in ~18 s
    main shaking in ~32 s
  • Bergamo
    115 km from the epicentre
    first tremor in ~19 s
    main shaking in ~33 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
1.2 times the height of Mount Everest

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

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 (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
0
last 7 days
7
last 30 days
5 before8 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: 45 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.

18275.0
Bassa Engadina, Ardez earthquake
2 April 1827 · 49 km from here
VIStrong: felt by everyone, many get scared; objects fall, first light damage to buildings.
19614.9
Val Monastero earthquake
9 August 1961 · 45 km from here
V-VIStrong: felt by everyone, many get scared; objects fall, first light damage to buildings.
20014.8
Val Venosta earthquake
17 July 2001 · 40 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 · 29 km from here
V-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 43 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

1.0
3 km West of Malé
20 km South-East · 10 km
1 month ago
15 Jul, 12:05
1.3
5 km West of Pellizzano
16 km South-West · 9 km
1 month ago
14 Jul, 16:37
2.1
4 km South-West of Peio
15 km South · 10 km
1 month ago
14 Jul, 16:33
1.4
8 km North of Peio
4 km South-West · 12 km
1 month ago
25 Jul, 16:04
0.7
7 km East of Martello
12 km East · 10 km
28 days ago
28 Jul, 12:14
0.9
8 km West of Tubre
29 km North-West · 11 km
24 days ago
1 Aug, 00:33
0.6
4 km West of Malé
18 km South-East · 11 km
21 days ago
4 Aug, 01:31
0.8
6 km North-East of Sondalo
21 km West · 10 km
18 days ago
7 Aug, 17:15
1.3
5 km West of Bresimo
17 km East · 10 km
2 months ago
29 Jun, 10:04
0.7
2 months ago
29 Jun, 01:42

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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