All earthquakes
1.5
very light
EARTHQUAKE DETAILS

3 km South of Torano Nuovo

77 months ago · 20 Feb, 09:32

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

Stronger than 68% of Italian events in the past year

Where

3 km South of Torano NuovoEarthquakes in the province of TeramoEarthquakes 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

19 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 ≈ 18 s

Animation sped up ~3× compared to reality.

  • Teramo
    17 km from the epicentre
    first tremor in ~5 s
    main shaking in ~9 s
  • Montesilvano
    46 km from the epicentre
    first tremor in ~9 s
    main shaking in ~15 s
  • Pescara
    52 km from the epicentre
    first tremor in ~10 s
    main shaking in ~17 s
  • Chieti
    58 km from the epicentre
    first tremor in ~11 s
    main shaking in ~18 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

27 km
medium depth
3.1 times the height of Mount Everest

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

deeper than 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 (M2.8, 77 months ago) in the same area. Aftershocks are normal after an earthquake and tend to fade over time.

2.8
The mainshock
2 km East of Acquasanta Terme
77 months ago · 12 Feb, 14:26
Activity in the area right now (30 km radius)
0
last 24 hours
0
last 7 days
4
last 30 days
11 before7 after
this quake
Strongest of the sequence2.8

How often does it happen here?

about every ~1 days

Within 50 km of this epicentre, a magnitude ≥ 2 earthquake has occurred on average this often: 6002 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.

16396.2
Monti della Laga earthquake
7 October 1639 · 46 km from here
XCompletely destructive: most buildings are destroyed.
20166.2
Monti della Laga earthquake
24 August 2016 · 46 km from here
XCompletely destructive: most buildings are destroyed.
16465.9
Monti della Laga earthquake
28 April 1646 · 48 km from here
IXDestructive: many buildings partly or fully collapse.
19505.7
Gran Sasso earthquake
5 September 1950 · 39 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

Southern Marche

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

estimated maximum magnitude 6.9between 4 and 11 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
77 months ago
20 Feb, 10:17
1.3
5 km South-West of Torricella Sicura
25 km South-West · 13 km
77 months ago
17 Feb, 05:07
2.8
77 months ago
12 Feb, 14:26
1.6
2 km South-West of Offida
14 km North-West · 28 km
77 months ago
28 Feb, 06:44
1.3
3 km South-West of Sant'Omero
4 km South-East · 27 km
77 months ago
10 Feb, 00:43
1.0
2 km South-West of Venarotta
27 km West · 11 km
77 months ago
2 Mar, 13:09
0.6
2 km East of Roccafluvione
27 km West · 11 km
77 months ago
8 Feb, 22:23
1.1
4 km East of Torricella Sicura
16 km South-West · 20 km
77 months ago
8 Feb, 03:50
1.3
1 km South-East of Atri
30 km South-East · 34 km
77 months ago
6 Feb, 03:30
1.9
3 km West of Montedinove
29 km North-West · 27 km
77 months ago
4 Feb, 17:31

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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