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2.7
light
EARTHQUAKE DETAILS

1 km North-West of San Carlo Canavese

123 months ago · 6 Jul, 00:53

A light earthquake, rarely felt by people. Being deep, it is felt less at the surface.

Stronger than 97% of Italian events in the past yearThe strongest of the past 12 months within 50 km

Where

1 km North-West of San Carlo CanaveseEarthquakes in the province of TorinoEarthquakes in Piemonte

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

8 events
Magnitude:lightweakmoderatestrong

The energy released

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

169kgof TNT equivalent
Less than the energy of a lightning bolt
M3
A magnitude 3 earthquake releases ×2.8 its energy
M2this quakeM4

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 ≈ 25 s

Animation sped up ~5× compared to reality.

  • Torino
    19 km from the epicentre
    first tremor in ~7 s
    main shaking in ~12 s
  • Moncalieri
    33 km from the epicentre
    first tremor in ~8 s
    main shaking in ~14 s
  • Asti
    60 km from the epicentre
    first tremor in ~12 s
    main shaking in ~20 s
  • Novara
    80 km from the epicentre
    first tremor in ~15 s
    main shaking in ~25 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

36 km
deep
4 times the height of Mount Everest

Being deep, it is felt less at the surface.

deeper than the area average (~14 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 0 aftershocks within 30 km. Aftershocks tend to fade in number and strength over time.

Activity in the area right now (30 km radius)
1
last 24 hours
1
last 7 days
4
last 30 days
7 before0 after
this quake
Strongest of the sequence2.3

How often does it happen here?

about every ~13 months

Within 50 km of this epicentre, a magnitude ≥ 2.5 earthquake has occurred on average this often: 11 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.

19145.2
Torinese earthquake
26 October 1914 · 31 km from here
VIIVery strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
18865.2
Torinese earthquake
5 September 1886 · 35 km from here
VIIVery strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
17535.2
Val Chisone earthquake
9 March 1753 · 49 km from here
VIIVery strong: hard to stand; chimneys and roof tiles fall, serious damage to weaker buildings.
17675.1
Valli di Lanzo earthquake
26 May 1767 · 9 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

Western Piemonte

The epicentre lies about 20 km from Western Piemonte, one of the seismic structures mapped by INGV geologists.

estimated maximum magnitude 7.1between 1 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
1 km West of Traves
17 km West · 10 km
124 months ago
1 Jul, 10:32
1.4
0 km West of Valgioie
30 km South-West · 12 km
124 months ago
24 Jun, 06:42
1.4
0 km North of Chiusa di San Michele
30 km South-West · 13 km
124 months ago
23 Jun, 20:36
1.0
3 km East of Borgone Susa
30 km South-West · 11 km
124 months ago
23 Jun, 17:28
1.1
124 months ago
23 Jun, 11:51
2.3
2 km South of Sparone
17 km North-West · 23 km
124 months ago
19 Jun, 18:52
1.1
2 km West of Villar Dora
26 km South-West · 11 km
124 months ago
8 Jun, 17:34

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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