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2.4
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EARTHQUAKE DETAILS

6 km South-East of Cartoceto

75 months ago · 24 Apr, 04:28

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

Stronger than 94% of Italian events in the past year

Where

6 km South-East of CartocetoEarthquakes 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

10 events
Magnitude:lightweakmoderatestrong

The energy released

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

60kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×7.9 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.

  • Fano
    7 km from the epicentre
    first tremor in ~3 s
    main shaking in ~4 s
  • Pesaro
    16 km from the epicentre
    first tremor in ~4 s
    main shaking in ~6 s
  • Ancona
    45 km from the epicentre
    first tremor in ~8 s
    main shaking in ~14 s
  • Rimini
    48 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

13 km
medium depth
1.5 times the height of Mount Everest

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

in line with the area average (~12 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 (M2.9, 75 months ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

2.9
The mainshock
3 km South of Colli al Metauro
75 months ago · 6 Apr, 06:57
Activity in the area right now (30 km radius)
0
last 24 hours
1
last 7 days
4
last 30 days
4 before5 after
this quake
Strongest of the sequence2.9

How often does it happen here?

about every ~5 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 808 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 · 41 km from here
XCompletely destructive: most buildings are destroyed.
17416.2
Fabrianese earthquake
24 April 1741 · 36 km from here
IXDestructive: many buildings partly or fully collapse.
19305.8
Senigallia earthquake
30 October 1930 · 34 km from here
VIII-IXDestructive: many buildings partly or fully collapse.
19165.8
Riminese earthquake
17 May 1916 · 45 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

Pesaro-Senigallia

The epicentre lies about 3 km from Pesaro-Senigallia, one of the seismic structures mapped by INGV geologists.

estimated maximum magnitude 6.3between 3 and 8 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

1.0
18 km North-East of Fano
24 km North-East · 9 km
75 months ago
19 Apr, 02:56
0.8
74 months ago
3 May, 13:48
0.3
1 km North-East of Pergola
21 km South-West · 16 km
74 months ago
3 May, 23:16
0.8
0 km West of Pergola
22 km South-West · 15 km
74 months ago
4 May, 02:04
1.4
2 km North of Pergola
20 km South-West · 15 km
74 months ago
4 May, 02:43
0.8
6 km North of San Costanzo
9 km North-East · 20 km
75 months ago
7 Apr, 12:54
2.9
75 months ago
6 Apr, 06:57
1.3
75 months ago
3 Apr, 00:41
2.0
4 km South-East of Acqualagna
27 km South-West · 34 km
74 months ago
17 May, 12:44

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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