Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 25-10-2020 and time 04:13:53 (Italy) in region 4 km N Sampeyre (CN)

A magnitude ML 1.2 earthquake occured in region: 4 km N Sampeyre (CN), on

  • 25-10-2020 03:13:53 (UTC)
  • 25-10-2020 04:13:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.6140, 7.2020 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sampeyre CN 4 1022 1022
Oncino CN 7 76 1098
Frassino CN 8 265 1363
Ostana CN 9 83 1446
Paesana CN 10 2784 4230
Sanfront CN 10 2395 6625
Crissolo CN 10 168 6793
Casteldelfino CN 11 157 6950
Melle CN 11 292 7242
Gambasca CN 12 371 7613
Elva CN 12 97 7710
Rifreddo CN 12 1078 8788
Macra CN 13 59 8847
Martiniana Po CN 13 734 9581
Stroppo CN 13 103 9684
Brossasco CN 14 1084 10768
Pontechianale CN 14 179 10947
Valmala CN 14 52 10999
Celle di Macra CN 15 100 11099
Isasca CN 15 76 11175
San Damiano Macra CN 15 430 11605
Bellino CN 15 109 11714
Envie CN 16 2074 13788
Revello CN 16 4262 18050
Barge CN 16 7774 25824
Brondello CN 16 290 26114
Venasca CN 16 1437 27551
Cartignano CN 17 190 27741
Pagno CN 18 585 28326
Prazzo CN 19 170 28496
Bagnolo Piemonte CN 19 6024 34520
Castellar CN 19 295 34815
Roccabruna CN 19 1585 36400
Marmora CN 19 68 36468
Rossana CN 20 908 37376
Rorà TO 20 257 37633
Canosio CN 20 80 37713

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of Cuneo (56081 inhabitants)
58 Km SW of Moncalieri (57294 inhabitants)
64 Km SW of Torino (890529 inhabitants)
85 Km W of Asti (76202 inhabitants)
100 Km NW of Sanremo (54807 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.2 2020-10-25
03:13:53		 44.6143 7.2023 11 2020-10-25
03:21:05		 Sala Sismica INGV-Roma 84106951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-25 03:13:53 ± 0.16
Latitude 44.6143 ± 0.0126
Longitude 7.2023 ± 0.0051
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84106951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1440
Semi-minor axis of confidence ellipse (meter) 0
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 16
Circular confidence region, given by single value of horizontal uncertainty (meter) 1440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.12411
Epicentral distance of station farthest from the epicenter (degree) 0.53510
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 84106951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-25 03:21:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.RRL.HHZ. 2020-10-25T03:14:08.61 0.6 undecidable manual S 317 47.0196 90 -0.09 51
GU.ENR.HHZ. 2020-10-25T03:14:07.68 0.3 undecidable manual S 158 46.3203 90 -0.86 60
GU.STV.HHZ. 2020-10-25T03:14:06.85 0.6 undecidable manual S 166 42.0246 90 -0.54 46
GU.RSP.HHZ. 2020-10-25T03:14:04.44 0.1 undecidable manual P 5 59.3961 90 0.16 100
GU.RRL.HHZ. 2020-10-25T03:14:03.05 1.0 negative manual P 317 47.0196 90 0.69 22
GU.STV.HHZ. 2020-10-25T03:14:02.04 0.6 positive manual P 166 42.0246 90 0.43 49
GU.ENR.HHZ. 2020-10-25T03:14:02.51 0.3 undecidable manual P 158 46.3203 90 0.24 75
GU.BHB.HHZ. 2020-10-25T03:14:02.66 0.6 undecidable manual S 11 24.9528 90 -0.17 52
GU.PZZ.HHZ. 2020-10-25T03:13:59.49 0.6 undecidable manual S 210 13.7751 91 -0.34 51
GU.BHB.HHZ. 2020-10-25T03:13:59.41 1.0 positive manual P 11 24.9528 90 0.43 25
GU.PZZ.HHZ. 2020-10-25T03:13:57.57 0.3 positive manual P 210 13.7751 91 0.33 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHN. ML:1.1 0.0001325 0.42 AML other m 2020-10-25T03:13:59.72
GU.PZZ.HHE. ML:1.2 0.000167 1.76 AML other m 2020-10-25T03:14:01.89
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download