All earthquakes
1.5
very light
EARTHQUAKE DETAILS

M1.5 earthquake · 2 km South-East of Asolo (TV)

4 years ago · 7 Aug 2022, 01:18

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 69% of Italian events in the past year

Where

2 km South-East of AsoloEarthquakes in the province of TrevisoEarthquakes 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

5 events
Magnitude:lightweakmoderatestrong

The energy released

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

2.7kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×178 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 ≈ 14 s

Animation sped up ~3× compared to reality.

  • Treviso
    27 km from the epicentre
    first tremor in ~5 s
    main shaking in ~8 s
  • Vicenza
    38 km from the epicentre
    first tremor in ~7 s
    main shaking in ~11 s
  • Padova
    42 km from the epicentre
    first tremor in ~7 s
    main shaking in ~12 s
  • Venezia
    47 km from the epicentre
    first tremor in ~8 s
    main shaking in ~14 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

9 km
shallow
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 (~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 (M2.3, 4 years ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

2.3
The mainshock
3 km North-West of Segusino
4 years ago · 5 Aug 2022, 07:37
Activity in the area right now (30 km radius)
0
last 24 hours
2
last 7 days
2
last 30 days
2 before2 after
this quake
Strongest of the sequence2.3

How often does it happen here?

about every ~56 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 77 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.

16956.4
Asolano earthquake
25 February 1695 · 9 km from here
XCompletely destructive: most buildings are destroyed.
19366.1
Alpago Cansiglio earthquake
18 October 1936 · 49 km from here
IXDestructive: many buildings partly or fully collapse.
18365.5
Asolano earthquake
12 June 1836 · 8 km from here
VIIIRuinous: partial collapses in ordinary buildings, widespread heavy damage.
19435.1
Feltrino earthquake
24 July 1943 · 23 km from here
VIIVery strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.

Source: Parametric Catalogue of Italian Earthquakes CPTI15 (INGV, CC BY 4.0).

The closest seismic structure

Thiene-Cornuda

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

estimated maximum magnitude 6.5between 1 and 7 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

1.4
1 km North of Segusino
19 km North · 9 km
4 years ago
8 Aug 2022, 08:49
2.3
3 km North-West of Segusino
20 km North · 8 km
4 years ago
5 Aug 2022, 07:37
1.6
3 km North-West of Rossano Veneto
12 km South-West · 12 km
4 years ago
31 Jul 2022, 09:13
1.8
4 km East of Segusino
20 km North-East · 6 km
4 years ago
18 Aug 2022, 05:45

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).