All earthquakes
0.7
very light
EARTHQUAKE DETAILS

2 km East of Mangone

78 months ago · 9 Apr, 17:38

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

Stronger than 11% of Italian events in the past year

Where

2 km East of MangoneEarthquakes in the province of CosenzaEarthquakes in Calabria

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

53 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 ×2,818 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 ≈ 15 s

Animation sped up ~3× compared to reality.

  • Cosenza
    11 km from the epicentre
    first tremor in ~4 s
    main shaking in ~6 s
  • Lamezia Terme
    27 km from the epicentre
    first tremor in ~5 s
    main shaking in ~9 s
  • Catanzaro
    41 km from the epicentre
    first tremor in ~7 s
    main shaking in ~13 s
  • Corigliano-Rossano
    48 km from the epicentre
    first tremor in ~9 s
    main shaking in ~15 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

18 km
medium depth
2 times the height of Mount Everest

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

in line with the area average (~18 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?

Foreshock

In hindsight it was a foreshock: 77 months ago the same area had a stronger quake (M2.0). This can only be said after the fact — it was not predictable beforehand.

2.0
The mainshock
11 km West of Cotronei
77 months ago · 3 May, 19:24
Activity in the area right now (30 km radius)
1
last 24 hours
4
last 7 days
20
last 30 days
27 before25 after
this quake
Strongest of the sequence2.0

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: 580 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.

16387.1
Calabria centrale earthquake
27 March 1638 · 17 km from here
XICatastrophic: very few buildings remain standing; landslides and ground cracks.
17837.0
Calabria centrale earthquake
28 March 1783 · 47 km from here
XICatastrophic: very few buildings remain standing; landslides and ground cracks.
16386.8
Crotonese earthquake
8 June 1638 · 42 km from here
XCompletely destructive: most buildings are destroyed.
11846.8
Valle del Crati earthquake
24 May 1184 · 25 km from here
IXDestructive: many buildings partly or fully collapse.

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

The closest seismic structure

Savuto Valley

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

estimated maximum magnitude 7.1between 2 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
6 km North of San Giovanni in Fiore
28 km North-East · 9 km
78 months ago
10 Apr, 06:49
1.4
4 km North of Albi
27 km South-East · 8 km
78 months ago
10 Apr, 16:34
0.4
2 km South-West of Rose
21 km North · 9 km
78 months ago
8 Apr, 08:58
0.6
6 km West of Cotronei
27 km East · 23 km
78 months ago
7 Apr, 22:23
1.2
4 km North-East of Albi
28 km South-East · 10 km
78 months ago
15 Apr, 16:31
0.8
8 km South-West of Serra d'Aiello
30 km South-West · 22 km
78 months ago
15 Apr, 20:23
1.2
4 km South-West of Taverna
23 km South-East · 6 km
78 months ago
15 Apr, 21:47
1.1
4 km North-East of Albi
28 km South-East · 9 km
77 months ago
17 Apr, 13:34
1.1
4 km South-East of Taverna
27 km South-East · 8 km
77 months ago
17 Apr, 13:50
0.3
1 km South of Parenti
12 km East · 7 km
77 months ago
18 Apr, 04:28

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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