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2.2
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EARTHQUAKE DETAILS

6 km East of Brentonico

43 months ago · 7 Feb, 09:37

A light earthquake, rarely felt by people. At this depth the shaking is felt, but rarely causes damage.

Stronger than 92% of Italian events in the past year

Where

6 km East of BrentonicoEarthquakes 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.

30kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×16 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 ≈ 20 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 ~7 s
    main shaking in ~13 s
  • Vicenza
    52 km from the epicentre
    first tremor in ~9 s
    main shaking in ~15 s
  • Brescia
    70 km from the epicentre
    first tremor in ~12 s
    main shaking in ~20 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

12 km
medium depth
1.3 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?

Mainshock

It is the strongest quake of its sequence: so far it has been followed by 4 aftershocks within 30 km. Aftershocks tend to fade in number and strength over time.

Activity in the area right now (30 km radius)
0
last 24 hours
1
last 7 days
12
last 30 days
7 before4 after
this quake
Strongest of the sequence1.7

How often does it happen here?

about every ~32 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 131 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 · 49 km from here
VII-VIIIRuinous: partial collapses in ordinary buildings, widespread heavy damage.
19325.2
Garda orientale earthquake
19 February 1932 · 31 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
5 km East of Vallarsa
12 km East · 13 km
43 months ago
9 Feb, 03:20
0.8
8 km North-West of Crespadoro
16 km South-East · 10 km
43 months ago
4 Feb, 20:57
1.0
3 km South-West of Mori
7 km West · 16 km
43 months ago
4 Feb, 13:00
1.0
1 km West of Vestenanova
29 km South-East · 11 km
43 months ago
11 Feb, 19:32
1.0
4 km East of Vallarsa
12 km East · 11 km
43 months ago
13 Feb, 02:13
1.4
3 km East of Vallarsa
11 km East · 14 km
43 months ago
14 Feb, 09:34
1.5
5 km North-West of Ala
7 km South-West · 13 km
44 months ago
29 Jan, 15:04
0.9
44 months ago
15 Jan, 21:07
1.7
2 km South-West of Ala
12 km South · 10 km
44 months ago
12 Jan, 10:18
1.0
4 km East of Vallarsa
11 km East · 13 km
44 months ago
10 Jan, 21:51

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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