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2.0
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EARTHQUAKE DETAILS

M2.0 earthquake · 6 km North of Scontrone (AQ)

7 years ago · 3 May 2019, 11:15

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

Stronger than 88% of Italian events in the past year

Where

6 km North of ScontroneEarthquakes in the province of L'AquilaEarthquakes in Abruzzo

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

18 events
Magnitude:lightweakmoderatestrong

The energy released

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

15kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×32 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 ≈ 22 s

Animation sped up ~4× compared to reality.

  • Chieti
    61 km from the epicentre
    first tremor in ~11 s
    main shaking in ~18 s
  • Pescara
    75 km from the epicentre
    first tremor in ~13 s
    main shaking in ~22 s
  • L'Aquila
    76 km from the epicentre
    first tremor in ~13 s
    main shaking in ~22 s
  • Montesilvano
    76 km from the epicentre
    first tremor in ~13 s
    main shaking in ~22 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

15 km
medium depth
1.7 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?

Mainshock

It is the strongest quake of its sequence: so far it has been followed by 5 aftershocks within 30 km. Aftershocks tend to fade in number and strength over time.

Activity in the area right now (30 km radius)
6
last 24 hours
9
last 7 days
22
last 30 days
12 before5 after
this quake
Strongest of the sequence2.0

How often does it happen here?

about every ~11 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 382 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.

19157.1
Marsica earthquake
13 January 1915 · 48 km from here
XICatastrophic: very few buildings remain standing; landslides and ground cracks.
17066.8
Maiella earthquake
3 November 1706 · 30 km from here
X-XICatastrophic: very few buildings remain standing; landslides and ground cracks.
13496.8
Lazio-Molise earthquake
9 September 1349 · 29 km from here
X-XICatastrophic: very few buildings remain standing; landslides and ground cracks.
18056.7
Molise earthquake
26 July 1805 · 50 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

Borbona-L'Aquila-Aremogna

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

estimated maximum magnitude 7.0between 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

0.9
7 years ago
3 May 2019, 11:11
1.0
7 years ago
29 Apr 2019, 00:44
1.2
2 km North of Pescasseroli
20 km West · 10 km
7 years ago
28 Apr 2019, 01:50
0.6
2 km North of Pescasseroli
20 km West · 10 km
7 years ago
28 Apr 2019, 00:42
2.0
2 km North of Belmonte Castello
29 km South-West · 10 km
7 years ago
25 Apr 2019, 06:54
1.1
6 km South of Civitella Alfedena
15 km South-West · 14 km
7 years ago
23 Apr 2019, 06:37
1.6
1 km East of San Donato Val di Comino
21 km South-West · 13 km
7 years ago
22 Apr 2019, 22:18
0.9
5 km South of Rocca Pia
8 km North-West · 20 km
7 years ago
21 Apr 2019, 20:25
1.7
1 km North-East of Picinisco
19 km South-West · 19 km
7 years ago
20 Apr 2019, 13:35
2.0
5 km South-East of Palena
17 km North-East · 20 km
7 years ago
20 May 2019, 05:32

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).