Earthquake with magnitude of ML 1.5 on date 10-10-2021 and time 23:42:42 (UTC) in region Virle Piemonte (TO)

A magnitude ML 1.5 earthquake occured in region: Virle Piemonte (TO), on

  • 10-10-2021 23:42:42 (UTC)
  • 11-10-2021 01:42:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.864, 7.566 at 34 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
Virle Piemonte TO 0 1206 1206
Osasio TO 3 936 2142
Castagnole Piemonte TO 4 2245 4387
Pancalieri TO 4 2038 6425
Cercenasco TO 5 1803 8228
Scalenghe TO 6 3339 11567
Vigone TO 6 5182 16749
Lombriasco TO 6 1050 17799
Faule CN 7 486 18285
Casalgrasso CN 7 1480 19765
Polonghera CN 7 1160 20925
None TO 8 8005 28930
Piobesi Torinese TO 9 3763 32693
Airasca TO 9 3794 36487
Carignano TO 10 9261 45748
Villafranca Piemonte TO 10 4729 50477
Vinovo TO 11 14887 65364
Volvera TO 11 8840 74204
Candiolo TO 11 5669 79873
Moretta CN 11 4136 84009
Buriasco TO 12 1410 85419
Carmagnola TO 12 29079 114498
Piscina TO 13 3388 117886
Murello CN 13 966 118852
Macello TO 13 1229 120081
La Loggia TO 13 8874 128955
Racconigi CN 14 10038 138993
Torre San Giorgio CN 14 730 139723
Villanova Solaro CN 15 772 140495
Cardè CN 15 1122 141617
Garzigliana TO 15 572 142189
Villastellone TO 16 4779 146968
Cavallerleone CN 16 644 147612
Nichelino TO 16 48123 195735
Orbassano TO 16 23188 218923
Piossasco TO 16 18589 237512
Caramagna Piemonte CN 17 3034 240546
Cavour TO 17 5545 246091
Osasco TO 18 1141 247232
Ruffia CN 18 367 247599
Beinasco TO 18 18159 265758
Moncalieri TO 18 57294 323052
Pinerolo TO 19 35808 358860
Frossasco TO 19 2864 361724
Santena TO 19 10830 372554
Bruino TO 19 8639 381193
Rivalta di Torino TO 19 19887 401080
Trofarello TO 19 11010 412090
Roletto TO 20 2009 414099
Cavallermaggiore CN 20 5533 419632

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km SW of Moncalieri (57294 inhabitants)
25 Km SW of Torino (890529 inhabitants)
51 Km W of Asti (76202 inhabitants)
52 Km N of Cuneo (56081 inhabitants)
83 Km W of Alessandria (93943 inhabitants)
95 Km NW of Savona (61345 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2021-10-10
23:42:42
44.8643 7.5658 34 2021-10-10
23:48:42
Sala Sismica INGV-Roma 96417741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-10 23:42:42 ± 0.29
Latitude 44.8643 ± 0.0072
Longitude 7.5658 ± 0.0178
Depth (km) 34 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96417741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1228
Semi-minor axis of confidence ellipse (meter) 605
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 271
Circular confidence region, given by single value of horizontal uncertainty (meter) 1230
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.51
Epicentral distance of station closest to the epicenter (degree) 0.21674
Epicentral distance of station farthest from the epicenter (degree) 0.6601
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0
Num. used stations 2
Type of magnitude ML
Reference to an origin 96417741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-10 23:48:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.STV.HHZ. 2021-10-10T23:43:05.74 0.1 undecidable manual S 195 0.6421 111 0.42 88
GU.TRAV.HHZ. 2021-10-10T23:43:05.19 0.3 undecidable manual S 11 0.6601 110 -0.63 62
GU.ENR.HHZ. 2021-10-10T23:43:05.13 0.3 undecidable manual S 189 0.643 111 -0.22 69
GU.GBOS.HHZ. 2021-10-10T23:43:05.26 0.3 undecidable manual S 162 0.652 111 -0.35 66
GU.RRL.HHE. 2021-10-10T23:43:03.44 0.1 undecidable manual S 276 0.5522 114 0.57 82
GU.PZZ.HHE. 2021-10-10T23:43:00.16 0.1 undecidable manual S 222 0.4802 118 -0.78 82
GU.RSP.HHZ. 2021-10-10T23:42:57.22 0.1 undecidable manual S 323 0.3543 127 -0.57 92
IV.MONC.HHZ. 2021-10-10T23:42:57.94 0.3 undecidable manual S 51 0.3301 129 0.71 64
GU.GBOS.HHZ. 2021-10-10T23:42:56.22 0.1 undecidable manual P 162 0.652 111 0.29 91
GU.STV.HHZ. 2021-10-10T23:42:55.30 0.1 undecidable manual P 195 0.6421 111 -0.47 87
GU.TRAV.HHZ. 2021-10-10T23:42:55.46 0.1 undecidable manual P 11 0.6601 110 -0.59 84
GU.RRL.HHE. 2021-10-10T23:42:55.10 0.1 undecidable manual P 276 0.5522 114 0.75 78
GU.ENR.HHZ. 2021-10-10T23:42:55.66 0.1 undecidable manual P 189 0.643 111 -0.13 94
GU.BHB.HHZ. 2021-10-10T23:42:54.50 0.1 undecidable manual S 262 0.2167 142 -0.34 100
GU.PZZ.HHE. 2021-10-10T23:42:53.03 0.1 undecidable manual P 222 0.4802 118 -0.2 96
IV.MONC.HHZ. 2021-10-10T23:42:51.98 0.1 undecidable manual P 51 0.3301 129 0.89 79
GU.RSP.HHZ. 2021-10-10T23:42:51.64 0.1 undecidable manual P 323 0.3543 127 0.22 96
GU.BHB.HHZ. 2021-10-10T23:42:50.15 0.1 negative manual P 262 0.2167 142 0.44 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MONC.HHN. ML:1.5 8.185E-5 1.8 AML other m 2021-10-10T23:42:58.09
IV.MONC.HHE. ML:1.4 7.06E-5 1.12 AML other m 2021-10-10T23:42:59.02
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