Earthquake with magnitude of ML 0.9 on date 20-01-2021 and time 01:47:21 (Italy) in region 5 km W Varisella (TO)

A magnitude ML 0.9 earthquake occured in region: 5 km W Varisella (TO), on

  • 20-01-2021 00:47:21 (UTC)
  • 20-01-2021 01:47:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.2, 7.42 at 10 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
Varisella TO 5 810 810
Val della Torre TO 5 3869 4679
Viù TO 6 1051 5730
Vallo Torinese TO 7 774 6504
Givoletto TO 7 3914 10418
Rubiana TO 7 2400 12818
Germagnano TO 8 1201 14019
La Cassa TO 8 1788 15807
Fiano TO 8 2695 18502
Traves TO 8 518 19020
Cafasse TO 9 3451 22471
Lanzo Torinese TO 9 5086 27557
Almese TO 9 6401 33958
Villar Dora TO 10 2932 36890
Pessinetto TO 10 606 37496
Mezzenile TO 11 786 38282
San Gillio TO 11 3174 41456
Balangero TO 11 3156 44612
Lemie TO 11 179 44791
Mathi TO 11 3921 48712
Villanova Canavese TO 11 1186 49898
Caselette TO 11 3060 52958
Robassomero TO 11 3057 56015
Monastero di Lanzo TO 11 350 56365
Coassolo Torinese TO 12 1547 57912
Caprie TO 12 2086 59998
Grosso TO 12 1018 61016
Sant'Ambrogio di Torino TO 12 4755 65771
Nole TO 13 6892 72663
Condove TO 13 4638 77301
Ceres TO 13 1065 78366
Chiusa di San Michele TO 13 1647 80013
Avigliana TO 14 12516 92529
Druento TO 14 8622 101151
Alpignano TO 14 17008 118159
Ciriè TO 15 18909 137068
Pianezza TO 15 15152 152220
Rosta TO 15 4903 157123
Buttigliera Alta TO 15 6419 163542
Corio TO 15 3277 166819
Valgioie TO 15 951 167770
Vaie TO 15 1458 169228
San Carlo Canavese TO 16 4031 173259
Sant'Antonino di Susa TO 16 4306 177565
Ala di Stura TO 16 469 178034
San Maurizio Canavese TO 16 10237 188271
Cantoira TO 16 564 188835
Reano TO 16 1818 190653
Usseglio TO 17 209 190862
Borgone Susa TO 17 2229 193091
Rivoli TO 17 48791 241882
Rocca Canavese TO 17 1708 243590
Villarbasse TO 18 3509 247099
Vauda Canavese TO 18 1464 248563
Collegno TO 18 49905 298468
Caselle Torinese TO 18 19136 317604
San Didero TO 18 551 318155
Venaria Reale TO 18 34193 352348
Trana TO 18 3877 356225
Giaveno TO 18 16455 372680
San Francesco al Campo TO 18 5005 377685
Villar Focchiardo TO 18 2042 379727
Borgaro Torinese TO 19 13592 393319
Barbania TO 19 1607 394926
Bruzolo TO 19 1524 396450
Chialamberto TO 19 345 396795
Coazze TO 19 3287 400082
Sangano TO 19 3707 403789
Levone TO 19 442 404231
Grugliasco TO 19 37966 442197
Balme TO 20 115 442312
Rivalta di Torino TO 20 19887 462199

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of Torino (890529 inhabitants)
30 Km NW of Moncalieri (57294 inhabitants)
70 Km W of Asti (76202 inhabitants)
90 Km N of Cuneo (56081 inhabitants)
98 Km W of Novara (104380 inhabitants)
99 Km W of Alessandria (93943 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 0.9 2021-01-20
00:47:21
45.2 7.43 10 2021-01-20
00:56:45
Sala Sismica INGV-Roma 86386811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-20 00:47:21 ± 0.23
Latitude 45.20 ± 0.01
Longitude 7.43 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86386811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2050
Semi-minor axis of confidence ellipse (meter) 1130
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 2050
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 162
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.52
Epicentral distance of station closest to the epicenter (degree) 0.33005
Epicentral distance of station farthest from the epicenter (degree) 0.6646
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:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 86386811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-20 00:56:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.RRL.HHZ. 2021-01-20T00:47:39.66 0.3 undecidable manual S 238 0.5279 50 -0.49 66
GU.TRAV.HHZ. 2021-01-20T00:47:35.19 0.1 undecidable manual S 36 0.3849 50 -0.74 83
GU.REMY.HHZ. 2021-01-20T00:47:35.40 0.1 undecidable manual P 344 0.6646 50 0.67 81
GU.BHB.HHZ. 2021-01-20T00:47:35.42 0.3 undecidable manual S 198 0.3822 50 -0.42 70
IV.MRGE.HHZ. 2021-01-20T00:47:34.53 0.1 undecidable manual P 336 0.6232 50 0.49 87
GU.LSD.HHZ. 2021-01-20T00:47:33.51 0.1 undecidable manual S 322 0.3301 50 -0.78 82
GU.RRL.HHZ. 2021-01-20T00:47:32.88 0.1 undecidable manual P 238 0.5279 50 0.48 89
GU.TRAV.HHZ. 2021-01-20T00:47:30.19 0.1 undecidable manual P 36 0.3849 50 0.23 97
GU.LSD.HHZ. 2021-01-20T00:47:29.21 0.1 undecidable manual P 322 0.3301 50 0.2 98
GU.BHB.HHZ. 2021-01-20T00:47:29.97 0.1 undecidable manual P 198 0.3822 50 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.BHB.HHN. ML:0.9 2.415E-5 0.58 AML other m 2021-01-20T00:47:36.82
GU.BHB.HHE. ML:1 3.02E-5 1.5 AML other m 2021-01-20T00:47:42.04
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download