All earthquakes
1.4
very light
EARTHQUAKE DETAILS

M1.4 earthquake · 3 km East of Tregnago (VR)

3 years ago · 13 Jul 2023, 07:43

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 63% of Italian events in the past year

Where

3 km East of TregnagoEarthquakes in the province of VeronaEarthquakes in Veneto

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

8 events
Magnitude:lightweakmoderatestrong

The energy released

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

1.9kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×251 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 ≈ 17 s

Animation sped up ~3× compared to reality.

  • Verona
    17 km from the epicentre
    first tremor in ~3 s
    main shaking in ~6 s
  • Vicenza
    29 km from the epicentre
    first tremor in ~5 s
    main shaking in ~9 s
  • Padova
    55 km from the epicentre
    first tremor in ~9 s
    main shaking in ~16 s
  • Trento
    59 km from the epicentre
    first tremor in ~10 s
    main shaking in ~17 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
shallow
1.1 times the height of Mount Everest

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

in line with the area average (~11 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?

Isolated quake

In the 30 days around this event no other quakes were recorded within 30 km: a one-off episode, very common in Italy.

Activity in the area right now (30 km radius)
0
last 24 hours
0
last 7 days
1
last 30 days
2 before5 after
this quake
Strongest of the sequence1.1

How often does it happen here?

about every ~35 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 124 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 · 31 km from here
IXDestructive: many buildings partly or fully collapse.
18915.9
Valle d'Illasi earthquake
7 June 1891 · 6 km from here
IXDestructive: many buildings partly or fully collapse.
12225.7
Bresciano-Veronese earthquake
25 December 1222 · 45 km from here
19325.2
Garda orientale earthquake
19 February 1932 · 39 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

Adige Plain

The epicentre lies about 13 km from Adige Plain, one of the seismic structures mapped by INGV geologists.

estimated maximum magnitude 7.2between 3 and 14 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

1.1
3 km East of Arzignano
13 km East · 9 km
3 years ago
2 Aug 2023, 01:44
0.7
4 km North-East of Ala
29 km North-West · 9 km
3 years ago
3 Aug 2023, 14:53
0.9
3 years ago
5 Aug 2023, 05:09
0.8
2 km North-West of Zevio
17 km South-West · 10 km
3 years ago
17 Jun 2023, 03:27
1.0
3 km East of Arzignano
14 km East · 9 km
3 years ago
10 Aug 2023, 01:18
0.8
3 km South-West of Ala
25 km North-West · 8 km
3 years ago
10 Aug 2023, 01:59
0.9
3 years ago
14 Jun 2023, 04:49

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).