Earthquake with magnitude of ML 1.6 on date 25-10-2021 and time 02:12:45 (Italy) in region 3 km W Entracque (CN)

A magnitude ML 1.6 earthquake occured in region: 3 km W Entracque (CN), on

  • 25-10-2021 00:12:45 (UTC)
  • 25-10-2021 02:12:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.236, 7.358 at 13 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Entracque CN 3 774 774
Valdieri CN 6 935 1709
Roaschia CN 9 107 1816
Moiola CN 10 234 2050
Demonte CN 10 2003 4053
Valloriate CN 12 109 4162
Gaiola CN 12 582 4744
Roccavione CN 13 2761 7505
Rittana CN 13 109 7614
Roccasparvera CN 14 741 8355
Robilante CN 14 2306 10661
Aisone CN 14 248 10909
Vernante CN 14 1178 12087
Borgo San Dalmazzo CN 15 12468 24555
Vignolo CN 17 2600 27155
Vinadio CN 17 644 27799
Limone Piemonte CN 18 1485 29284
Bernezzo CN 18 4104 33388
Cervasca CN 19 5013 38401
Boves CN 19 9835 48236
Valgrana CN 20 786 49022
Monterosso Grana CN 20 505 49527

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Cuneo (56081 inhabitants)
57 Km NW of Sanremo (54807 inhabitants)
89 Km SW of Moncalieri (57294 inhabitants)
90 Km W of Savona (61345 inhabitants)
97 Km S of Torino (890529 inhabitants)
100 Km SW of Asti (76202 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.6 2021-10-25
00:12:45
44.2357 7.3582 13 2021-10-25
00:20:11
Sala Sismica INGV-Roma 96966291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-25 00:12:45 ± 0.13
Latitude 44.2357 ± 0.0081
Longitude 7.3582 ± 0.0126
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96966291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1026
Semi-minor axis of confidence ellipse (meter) 654
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 1030
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
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) 0.02428
Epicentral distance of station farthest from the epicenter (degree) 0.90112
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 96966291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-25 00:20:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PCP.HHZ. 2021-10-25T00:13:03.20 0.1 undecidable manual P 70 0.9011 91 0.53 76
GU.IMI.HHZ. 2021-10-25T00:13:02.63 0.1 undecidable manual S 130 0.5036 92 -0.57 81
GU.BURY.HHZ. 2021-10-25T00:13:02.24 0.1 undecidable manual S 162 0.4748 93 -0.13 90
GU.MGRO.HHZ. 2021-10-25T00:12:59.04 0.1 undecidable manual S 121 0.3759 94 -0.41 88
IV.QLNO.HHZ. 2021-10-25T00:12:59.67 0.1 undecidable manual P 83 0.7123 92 0.23 84
GU.CANO.HHZ. 2021-10-25T00:12:58.00 0.1 undecidable manual P 92 0.6304 92 -0.03 90
GU.PZZ.HHZ. 2021-10-25T00:12:57.40 0.1 undecidable manual S 327 0.3211 95 -0.43 87
GU.RORO.HHZ. 2021-10-25T00:12:56.32 0.1 undecidable manual P 103 0.5225 92 0.13 90
FR.SAOF.HHZ.00 2021-10-25T00:12:56.43 0.1 undecidable manual S 151 0.286 96 -0.35 89
GU.IMI.HHZ. 2021-10-25T00:12:56.00 0.1 undecidable manual P 130 0.5036 92 0.14 90
GU.BHB.HHZ. 2021-10-25T00:12:56.73 0.1 undecidable manual P 354 0.6034 92 -0.84 70
GU.BURY.HHZ. 2021-10-25T00:12:55.96 0.1 undecidable manual P 162 0.4748 93 0.58 82
GU.MGRO.HHZ. 2021-10-25T00:12:53.80 0.1 undecidable manual P 121 0.3759 94 0.11 93
GU.PZZ.HHZ. 2021-10-25T00:12:52.96 0.1 undecidable manual P 327 0.3211 95 0.2 93
FR.SAOF.HHZ.00 2021-10-25T00:12:52.41 0.1 undecidable manual P 151 0.286 96 0.25 92
GU.ENR.HHZ. 2021-10-25T00:12:50.29 0.1 undecidable manual S 98 0.0432 154 -0.17 99
GU.STV.HHZ. 2021-10-25T00:12:50.31 0.1 undecidable manual S 293 0.0243 165 0.05 100
GU.STV.HHZ. 2021-10-25T00:12:48.64 0.1 undecidable manual P 293 0.0243 165 0.25 96
GU.ENR.HHZ. 2021-10-25T00:12:48.76 0.1 undecidable manual P 98 0.0432 154 0.26 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.ENR.HHN. ML:2.1 0.00174 0.06 AML other m 2021-10-25T00:12:50.29
GU.ENR.HHE. ML:2.4 0.003345 0.08 AML other m 2021-10-25T00:12:50.33
GU.STV.HHE. ML:1.4 0.0003645 0.24 AML other m 2021-10-25T00:12:50.36
GU.STV.HHN. ML:1.7 0.0006545 0.14 AML other m 2021-10-25T00:12:50.38
FR.SAOF.HHN.00 ML:1.3 9.705E-5 0.16 AML other m 2021-10-25T00:12:56.65
FR.SAOF.HHE.00 ML:1.4 0.000114 0.26 AML other m 2021-10-25T00:12:56.67
GU.PZZ.HHE. ML:1.5 0.000123 0.46 AML other m 2021-10-25T00:12:58.36
GU.PZZ.HHN. ML:1.8 0.000214 0.42 AML other m 2021-10-25T00:12:58.14
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