Earthquake with magnitude of ML 1.0 on date 20-10-2021 and time 04:39:16 (UTC) in region 1 km NW Ceres (TO)

A magnitude ML 1.0 earthquake occured in region: 1 km NW Ceres (TO), on

  • 20-10-2021 04:39:16 (UTC)
  • 20-10-2021 06:39:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.326, 7.384 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
Ceres TO 2 1065 1065
Cantoira TO 2 564 1629
Mezzenile TO 4 786 2415
Pessinetto TO 4 606 3021
Chialamberto TO 5 345 3366
Monastero di Lanzo TO 5 350 3716
Ala di Stura TO 6 469 4185
Coassolo Torinese TO 7 1547 5732
Traves TO 7 518 6250
Groscavallo TO 9 204 6454
Lanzo Torinese TO 9 5086 11540
ViĆ¹ TO 10 1051 12591
Germagnano TO 10 1201 13792
Corio TO 12 3277 17069
Locana TO 12 1498 18567
Balangero TO 12 3156 21723
Lemie TO 13 179 21902
Balme TO 13 115 22017
Cafasse TO 14 3451 25468
Vallo Torinese TO 15 774 26242
Mathi TO 15 3921 30163
Ribordone TO 15 53 30216
Noasca TO 15 137 30353
Varisella TO 15 810 31163
Rocca Canavese TO 15 1708 32871
Grosso TO 16 1018 33889
Sparone TO 16 1038 34927
Fiano TO 16 2695 37622
Forno Canavese TO 16 3446 41068
Villanova Canavese TO 16 1186 42254
Usseglio TO 17 209 42463
Ceresole Reale TO 17 156 42619
Pratiglione TO 17 535 43154
Nole TO 17 6892 50046
Levone TO 18 442 50488
Canischio TO 18 277 50765
Alpette TO 18 261 51026
Prascorsano TO 19 745 51771
Rivara TO 19 2659 54430
Vauda Canavese TO 19 1464 55894
La Cassa TO 19 1788 57682
San Colombano Belmonte TO 20 383 58065
Val della Torre TO 20 3869 61934
Pont-Canavese TO 20 3483 65417
Barbania TO 20 1607 67024
San Carlo Canavese TO 20 4031 71055

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of Torino (890529 inhabitants)
43 Km NW of Moncalieri (57294 inhabitants)
80 Km NW of Asti (76202 inhabitants)
98 Km W of Novara (104380 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 1.0 2021-10-20
04:39:16
45.3262 7.3835 10 2021-10-20
04:57:28
Sala Sismica INGV-Roma 96785521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 04:39:16 ± 0.21
Latitude 45.3262 ± 0.0081
Longitude 7.3835 ± 0.0166
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96785521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1198
Semi-minor axis of confidence ellipse (meter) 870
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 281
Circular confidence region, given by single value of horizontal uncertainty (meter) 1200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
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) 0.51
Epicentral distance of station closest to the epicenter (degree) 0.19605
Epicentral distance of station farthest from the epicenter (degree) 0.83007
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 13
Type of magnitude ML
Reference to an origin 96785521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 04:57:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
CH.DIX.HHE. 2021-10-20T04:39:40.59 0.6 undecidable manual S 1 0.7536 50 -0.73 37
GU.RRL.HHZ. 2021-10-20T04:39:36.18 0.3 undecidable manual S 226 0.5828 50 -0.06 69
MN.BNI.HHE. 2021-10-20T04:39:35.14 0.6 undecidable manual S 241 0.5675 50 -0.66 39
GU.BHB.HHZ. 2021-10-20T04:39:33.27 0.6 undecidable manual S 190 0.4973 50 -0.47 43
IV.MRGE.HHZ. 2021-10-20T04:39:33.33 0.1 undecidable manual S 333 0.4973 50 -0.4 87
CH.MMK.HHE. 2021-10-20T04:39:32.87 0.1 undecidable manual P 29 0.8301 50 0.85 69
CH.DIX.HHE. 2021-10-20T04:39:31.44 0.3 undecidable manual P 1 0.7536 50 0.72 55
GU.RRL.HHZ. 2021-10-20T04:39:28.15 0.1 undecidable manual P 226 0.5828 50 0.36 86
MN.BNI.HHE. 2021-10-20T04:39:28.14 0.1 undecidable manual P 241 0.5675 50 0.61 80
GU.TRAV.HHZ. 2021-10-20T04:39:27.67 0.1 undecidable manual S 54 0.3148 50 -0.65 83
GU.CIRO.HHZ. 2021-10-20T04:39:27.26 0.1 undecidable manual S 25 0.3049 50 -0.75 80
GU.BHB.HHZ. 2021-10-20T04:39:26.87 0.3 undecidable manual P 190 0.4973 50 0.53 63
IV.MRGE.HHZ. 2021-10-20T04:39:26.97 0.1 undecidable manual P 333 0.4973 50 0.63 81
GU.LSD.HHZ. 2021-10-20T04:39:24.61 0.6 undecidable manual S 307 0.2203 112 -0.76 40
GU.CIRO.HHZ. 2021-10-20T04:39:23.31 0.1 undecidable manual P 25 0.3049 50 0.28 93
GU.RSP.HHZ. 2021-10-20T04:39:23.68 0.1 undecidable manual S 205 0.1961 114 -0.85 78
GU.TRAV.HHZ. 2021-10-20T04:39:23.34 0.1 undecidable manual P 54 0.3148 50 0.12 95
GU.RSP.HHZ. 2021-10-20T04:39:21.03 0.1 undecidable manual P 205 0.1961 114 0.01 100
GU.LSD.HHZ. 2021-10-20T04:39:21.74 0.1 undecidable manual P 307 0.2203 112 0.23 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RSP.HHN. ML:1.1 9.14E-5 0.1 AML other m 2021-10-20T04:39:24.08
GU.LSD.HHE. ML:0.9 4.425E-5 0.2 AML other m 2021-10-20T04:39:24.86
GU.RSP.HHE. ML:1.1 8.975112E-5 0.16 AML other m 2021-10-20T04:39:23.82
GU.LSD.HHN. ML:0.8 3.900306E-5 0.1984 AML other m 2021-10-20T04:39:24.90
GU.CIRO.HHE. ML:0.9 3.547774E-5 0.08 AML other m 2021-10-20T04:39:27.48
GU.CIRO.HHN. ML:0.7 2.1840895E-5 0.0608 AML other m 2021-10-20T04:39:27.59
GU.TRAV.HHE. ML:1.2 5.9581275E-5 0.1408 AML other m 2021-10-20T04:39:29.72
GU.TRAV.HHN. ML:1 4.6310655E-5 0.0992 AML other m 2021-10-20T04:39:30.53
GU.RSP.HNE. ML:1 6.662597E-5 0.16 AML other m 2021-10-20T04:39:23.82
GU.RSP.HNN. ML:1 7.01557E-5 0.112 AML other m 2021-10-20T04:39:24.09
GU.BHB.HHN. ML:0.9 1.90910745E-5 0.2624 AML other m 2021-10-20T04:39:34.70
IV.MRGE.HHE. ML:0.9 2.176005E-5 0.1824 AML other m 2021-10-20T04:39:34.89
IV.MRGE.HHN. ML:1 2.601541E-5 0.08 AML other m 2021-10-20T04:39:34.95
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