All earthquakes
1.0
very light
EARTHQUAKE DETAILS

5 km South of Rovereto

133 months ago · 21 Sept, 19:16

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

5 km South of RoveretoEarthquakes 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

12 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 ≈ 21 s

Animation sped up ~4× compared to reality.

  • Trento
    25 km from the epicentre
    first tremor in ~5 s
    main shaking in ~8 s
  • Verona
    43 km from the epicentre
    first tremor in ~8 s
    main shaking in ~13 s
  • Vicenza
    51 km from the epicentre
    first tremor in ~9 s
    main shaking in ~15 s
  • Brescia
    71 km from the epicentre
    first tremor in ~12 s
    main shaking in ~21 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

14 km
medium depth
1.6 times the height of Mount Everest

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

deeper than the area average (~7 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 (M2.2, 134 months ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

2.2
The mainshock
3 km South of Malcesine
134 months ago · 27 Aug, 04:24
Activity in the area right now (30 km radius)
0
last 24 hours
3
last 7 days
14
last 30 days
4 before7 after
this quake
Strongest of the sequence2.2

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: 130 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.

18915.9
Valle d'Illasi earthquake
7 June 1891 · 31 km from here
IXDestructive: many buildings partly or fully collapse.
12225.7
Bresciano-Veronese earthquake
25 December 1222 · 45 km from here
19015.4
Garda occidentale earthquake
30 October 1901 · 50 km from here
VII-VIIIRuinous: partial collapses in ordinary buildings, widespread heavy damage.
19325.2
Garda orientale earthquake
19 February 1932 · 32 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

Monte Baldo

The epicentre lies about 3 km from Monte Baldo, one of the seismic structures mapped by INGV geologists.

estimated maximum magnitude 6.7between 3 and 9 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
133 months ago
20 Sept, 10:32
1.9
2 km South of Ledro
24 km West · 5 km
133 months ago
23 Sept, 08:11
0.8
4 km West of Vallarsa
6 km South-East · 10 km
133 months ago
27 Sept, 10:28
1.5
1 km North-West of Laghi
17 km East · 11 km
133 months ago
2 Oct, 23:33
0.9
6 km North of Ala
5 km South · 10 km
133 months ago
3 Oct, 17:23
1.2
5 km West of Laghi
13 km East · 13 km
133 months ago
4 Oct, 07:05
2.1
3 km South-East of Pedemonte
25 km East · 11 km
134 months ago
5 Sept, 12:20
1.6
2 km East of Velo d'Astico
27 km East · 12 km
133 months ago
11 Oct, 21:57
1.9
3 km West of Brenzone sul Garda
28 km South-West · 10 km
132 months ago
16 Oct, 15:29
2.2
3 km South of Malcesine
18 km South-West · 10 km
134 months ago
27 Aug, 04:24

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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