All earthquakes
1.6
very light
EARTHQUAKE DETAILS

5 km North-East of Cantiano

56 months ago · 7 Nov, 14:21

A very light earthquake, probably not felt by people. At this depth the shaking is felt, but rarely causes damage.

Stronger than 73% of Italian events in the past year

Where

5 km North-East of CantianoEarthquakes in the province of Pesaro e UrbinoEarthquakes in Marche

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

61 events
Magnitude:lightweakmoderatestrong

The energy released

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

3.8kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×126 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 ≈ 17 s

Animation sped up ~3× compared to reality.

  • Pesaro
    42 km from the epicentre
    first tremor in ~7 s
    main shaking in ~12 s
  • Fano
    43 km from the epicentre
    first tremor in ~7 s
    main shaking in ~13 s
  • Perugia
    50 km from the epicentre
    first tremor in ~9 s
    main shaking in ~15 s
  • Rimini
    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

12 km
medium depth
1.4 times the height of Mount Everest

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

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 (M3.2, 56 months ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

3.2
The mainshock
6 km North of Cantiano
56 months ago · 24 Oct, 07:39
Activity in the area right now (30 km radius)
9
last 24 hours
36
last 7 days
172
last 30 days
98 before85 after
this quake
Strongest of the sequence3.2

How often does it happen here?

about every ~7 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 603 events in the last 11 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.

17816.5
Cagliese earthquake
3 June 1781 · 15 km from here
XCompletely destructive: most buildings are destroyed.
17516.4
Appennino umbro-marchigiano earthquake
27 July 1751 · 32 km from here
XCompletely destructive: most buildings are destroyed.
13526.3
Alta Valtiberina earthquake
25 December 1352 · 43 km from here
IXDestructive: many buildings partly or fully collapse.
12796.2
Appennino umbro-marchigiano earthquake
30 April 1279 · 49 km from here
XCompletely destructive: most buildings are destroyed.

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

The closest seismic structure

Piandimeleto-Bavareto

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

estimated maximum magnitude 7.1between 1 and 10 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

1.9
4 km North-East of Cantiano
0 km South-West · 11 km
56 months ago
7 Nov, 16:17
0.5
5 km East of Scheggia e Pascelupo
14 km South-East · 11 km
56 months ago
7 Nov, 09:49
0.1
4 km West of Fabriano
26 km South-East · 14 km
56 months ago
8 Nov, 02:56
1.3
4 km West of Arcevia
20 km East · 41 km
56 months ago
6 Nov, 22:27
0.7
56 months ago
8 Nov, 11:45
0.8
7 km South-West of Apecchio
21 km West · 8 km
56 months ago
8 Nov, 14:06
0.9
7 km East of Cagli
11 km North-East · 10 km
56 months ago
6 Nov, 11:19
0.8
7 km South-West of Apecchio
21 km West · 8 km
56 months ago
8 Nov, 18:50
1.6
5 km North-East of Gubbio
17 km South-West · 6 km
56 months ago
8 Nov, 22:13
0.4
3 km East of Gubbio
21 km South-West · 9 km
56 months ago
5 Nov, 17:40

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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