All earthquakes
0.8
very light
EARTHQUAKE DETAILS

7 km East of Gardone Riviera

5 months ago · 23 Mar, 06:21

A very light earthquake, probably not felt by people. At only a few km deep the shaking is felt more sharply at the surface.

Stronger than 16% of Italian events in the past year

Where

7 km East of Gardone RivieraEarthquakes in the province of BresciaEarthquakes in Lombardia

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

16 events
Magnitude:lightweakmoderatestrong

The energy released

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

0.2kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×1,995 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.

  • Brescia
    35 km from the epicentre
    first tremor in ~6 s
    main shaking in ~10 s
  • Verona
    35 km from the epicentre
    first tremor in ~6 s
    main shaking in ~10 s
  • Trento
    59 km from the epicentre
    first tremor in ~10 s
    main shaking in ~17 s
  • Vicenza
    72 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

8 km
shallow

At only a few km deep the shaking is felt more sharply at the surface.

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 (M2.0, 5 months ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

2.0
The mainshock
3 km South-West of Storo
5 months ago · 19 Mar, 04:00
Activity in the area right now (30 km radius)
0
last 24 hours
0
last 7 days
4
last 30 days
7 before8 after
this quake
Strongest of the sequence2.0

How often does it happen here?

about every ~30 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 142 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 · 49 km from here
IXDestructive: many buildings partly or fully collapse.
18915.9
Valle d'Illasi earthquake
7 June 1891 · 41 km from here
IXDestructive: many buildings partly or fully collapse.
12225.7
Bresciano-Veronese earthquake
25 December 1222 · 10 km from here
19015.4
Garda occidentale earthquake
30 October 1901 · 13 km from here
VII-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

Giudicarie

The epicentre sits above this source area: the deep structure where this area's earthquakes can originate.

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

1.8
5 months ago
23 Mar, 10:36
2.0
3 km South-West of Storo
24 km North-West · 10 km
5 months ago
19 Mar, 04:00
1.1
5 km South-West of Malcesine
18 km North-East · 8 km
5 months ago
17 Mar, 01:29
1.3
5 km West of Erbezzo
24 km East · 11 km
5 months ago
1 Apr, 04:26
1.3
5 months ago
1 Apr, 13:38
1.1
5 months ago
2 Apr, 07:37
1.0
2 km South of Caino
24 km West · 4 km
6 months ago
11 Mar, 18:31
0.6
5 months ago
6 Apr, 23:27
1.4
4 km East of Ledro
29 km North-East · 10 km
5 months ago
7 Apr, 04:15
1.4
4 km North-East of Gargnano
12 km North · 11 km
5 months ago
11 Apr, 02:33

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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