Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 18-08-2021 and time 23:32:36 (Italy) in region 2 km E Vigone (TO)

A magnitude ML 1.8 earthquake occured in region: 2 km E Vigone (TO), on

  • 18-08-2021 21:32:36 (UTC)
  • 18-08-2021 23:32:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.8350, 7.5230 at 28 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Vigone TO 2 5182 5182
Cercenasco TO 3 1803 6985
Virle Piemonte TO 5 1206 8191
Pancalieri TO 5 2038 10229
Faule CN 6 486 10715
Villafranca Piemonte TO 6 4729 15444
Scalenghe TO 6 3339 18783
Polonghera CN 7 1160 19943
Osasio TO 8 936 20879
Moretta CN 8 4136 25015
Castagnole Piemonte TO 8 2245 27260
Casalgrasso CN 8 1480 28740
Lombriasco TO 9 1050 29790
Airasca TO 10 3794 33584
Buriasco TO 10 1410 34994
Macello TO 10 1229 36223
Cardè CN 11 1122 37345
Torre San Giorgio CN 11 730 38075
None TO 11 8005 46080
Murello CN 11 966 47046
Garzigliana TO 12 572 47618
Piscina TO 12 3388 51006
Villanova Solaro CN 12 772 51778
Cavour TO 13 5545 57323
Piobesi Torinese TO 13 3763 61086
Volvera TO 13 8840 69926
Osasco TO 14 1141 71067
Racconigi CN 14 10038 81105
Carignano TO 15 9261 90366
Candiolo TO 15 5669 96035
Cavallerleone CN 15 644 96679
Carmagnola TO 16 29079 125758
Vinovo TO 16 14887 140645
Ruffia CN 16 367 141012
Campiglione Fenile TO 16 1390 142402
Pinerolo TO 16 35808 178210
Bricherasio TO 17 4616 182826
Scarnafigi CN 17 2162 184988
Frossasco TO 17 2864 187852
La Loggia TO 18 8874 196726
San Secondo di Pinerolo TO 18 3575 200301
Piossasco TO 18 18589 218890
Monasterolo di Savigliano CN 18 1371 220261
Roletto TO 18 2009 222270
Bagnolo Piemonte CN 18 6024 228294
Caramagna Piemonte CN 18 3034 231328
San Pietro Val Lemina TO 18 1448 232776
Bibiana TO 19 3442 236218
Cantalupa TO 19 2553 238771
Cavallermaggiore CN 19 5533 244304
Orbassano TO 19 23188 267492
Barge CN 20 7774 275266

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Moncalieri (57294 inhabitants)
29 Km SW of Torino (890529 inhabitants)
49 Km N of Cuneo (56081 inhabitants)
54 Km W of Asti (76202 inhabitants)
87 Km W of Alessandria (93943 inhabitants)
96 Km NW of Savona (61345 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
Bulletin
Rev1000 		ML 1.8 2021-08-18
21:32:36		 44.8353 7.5233 29 2021-12-29
11:12:27		 Bollettino Sismico Italiano INGV 95163231
Reviewed
Rev100 		ML 1.7 2021-08-18
21:32:36		 44.849 7.5158 30 2021-08-18
21:47:47		 Sala Sismica INGV-Roma 94346021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-18 21:32:36 ± 0.1
Latitude 44.8353 ± 0.0054
Longitude 7.5233 ± 0.0089
Depth (km) 29 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95163231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 774
Semi-minor axis of confidence ellipse (meter) 162
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 63
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.52165
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 95163231
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-10 14:29:50

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 94346021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-18 21:47:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.STAL.HNZ. 2021-08-18T21:34:22.17 3.0 undecidable manual Sn 1.5 0
IV.FIAM.HHZ. 2021-08-18T21:34:03.77 3.0 undecidable manual Pg 16.6 0
IV.INTR.HHZ. 2021-08-18T21:33:56.90 3.0 negative manual Pn 1.07 0
IV.COR1.EHZ. 2021-08-18T21:33:56.53 3.0 undecidable manual Pg 18.84 0
IV.MBAL.EHZ. 2021-08-18T21:33:28.48 3.0 positive manual Pg 12.83 0
IV.ZEN8.EHZ. 2021-08-18T21:33:21.10 3.0 undecidable manual Pg 6.88 0
GU.IMI.HHZ. 2021-08-18T21:33:07.25 0.3 undecidable manual S 164 106.7154 101 -0.3 64
GU.RORO.HHZ. 2021-08-18T21:33:03.12 0.3 undecidable manual S 152 91.0422 103 -0.32 66
FR.SAOF.HHZ. 2021-08-18T21:33:03.56 0.6 undecidable manual S 179 94.239 102 -0.73 39
GU.CANO.HHZ. 2021-08-18T21:33:02.71 0.6 undecidable manual S 141 89.6436 103 -0.38 43
IV.QLNO.HHZ. 2021-08-18T21:33:01.97 0.6 undecidable manual S 131 86.247 103 -0.23 45
CH.MUGIO.HHZ. 2021-08-18T21:33:01.86 0.3 undecidable manual P 44 168.9087 54 -0.38 52
IV.VARE.HHN. 2021-08-18T21:33:00.28 0.3 undecidable manual P 40 150.2385 54 0.37 59
MN.BNI.HHZ. 2021-08-18T21:32:58.05 0.3 undecidable manual S 290 70.5738 107 -0.12 72
CH.DIX.HHZ. 2021-08-18T21:32:57.87 0.6 undecidable manual P 356 138.3615 54 -0.57 36
GU.GBOS.HHZ. 2021-08-18T21:32:57.83 0.3 undecidable manual S 159 70.4739 107 -0.3 69
CH.MMK.HHN. 2021-08-18T21:32:57.54 0.6 undecidable manual P 14 139.0608 54 -0.99 30
GU.STV.HHZ. 2021-08-18T21:32:56.33 0.3 undecidable manual S 193 67.2771 107 -1 55
GU.ENR.HHZ. 2021-08-18T21:32:56.86 0.3 undecidable manual S 187 67.7766 107 -0.58 65
GU.RNCA.HHE. 2021-08-18T21:32:56.52 0.6 undecidable manual P 109 119.6913 54 0.41 41
GU.BURY.HHZ. 2021-08-18T21:32:55.83 0.3 undecidable manual P 179 116.7942 54 0.07 67
GU.RRL.HHZ. 2021-08-18T21:32:55.53 0.3 undecidable manual S 280 58.3971 110 0.45 68
GU.IMI.HHZ. 2021-08-18T21:32:54.55 0.1 undecidable manual P 164 106.7154 101 0.25 87
IV.MRGE.HHZ. 2021-08-18T21:32:54.24 0.6 undecidable manual P 341 109.7124 100 -0.51 40
FR.SAOF.HHZ. 2021-08-18T21:32:52.37 0.3 undecidable manual P 179 94.239 102 -0.04 70
GU.CANO.HHZ. 2021-08-18T21:32:52.26 0.1 undecidable manual P 141 89.6436 103 0.54 84
GU.PZZ.HHZ. 2021-08-18T21:32:52.21 0.3 undecidable manual S 222 48.618 115 -0.46 70
GU.RORO.HHZ. 2021-08-18T21:32:52.38 0.3 undecidable manual P 152 91.0422 103 0.46 64
GU.MGRO.HHZ. 2021-08-18T21:32:52.22 0.1 undecidable manual P 166 90.8424 103 0.33 88
IV.QLNO.HHZ. 2021-08-18T21:32:51.65 0.1 undecidable manual P 131 86.247 103 0.44 87
IV.MONC.HHZ. 2021-08-18T21:32:51.73 0.6 undecidable manual S 50 41.3253 119 0.81 42
GU.PCP.HHN. 2021-08-18T21:32:51.48 0.3 undecidable manual P 112 86.9463 103 0.17 69
GU.RSP.HHZ. 2021-08-18T21:32:49.79 0.3 undecidable manual S 330 40.2264 120 -0.87 60
GU.LSD.HHZ. 2021-08-18T21:32:49.20 0.3 undecidable manual P 336 75.6687 105 -0.42 66
MN.BNI.HHZ. 2021-08-18T21:32:49.74 0.3 undecidable manual P 290 70.5738 107 0.87 57
GU.GBOS.HHZ. 2021-08-18T21:32:49.34 0.3 undecidable manual P 159 70.4739 107 0.49 66
GU.STV.HHZ. 2021-08-18T21:32:48.27 0.1 undecidable manual P 193 67.2771 107 -0.12 96
GU.TRAV.HHZ. 2021-08-18T21:32:48.39 0.3 undecidable manual P 13 77.0673 105 -1.44 41
GU.ENR.HHZ. 2021-08-18T21:32:48.48 0.3 undecidable manual P 187 67.7766 107 0.03 74
GU.RRL.HHZ. 2021-08-18T21:32:47.84 0.1 undecidable manual P 280 58.3971 110 0.75 82
GU.BHB.HHZ. 2021-08-18T21:32:46.41 0.3 undecidable manual S 270 20.4684 141 -0.19 78
IV.MONC.HHZ. 2021-08-18T21:32:45.05 0.1 undecidable manual P 50 41.3253 119 0.36 97
GU.PZZ.HHZ. 2021-08-18T21:32:45.79 0.3 undecidable manual P 222 48.618 115 0.09 75
GU.RSP.HHZ. 2021-08-18T21:32:44.39 0.1 negative manual P 330 40.2264 120 -0.15 100
GU.BHB.HHZ. 2021-08-18T21:32:42.61 0.1 undecidable manual P 270 20.4684 141 0.41 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.BHB.HHN. ML:1.9 0.0003285 0.28 AML other m 2021-08-18T21:32:46.85
GU.BHB.HNN. ML:1.9 0.0003175 0.26 AML other m 2021-08-18T21:32:46.85
GU.BHB.HNE. ML:1.8 0.000263 1.4 AML other m 2021-08-18T21:32:48.74
GU.BHB.HHE. ML:1.8 0.00028149999999999996 1.38 AML other m 2021-08-18T21:32:48.74
GU.ENR.HHN. ML:2.0 0.00016099999999999998 0.06 AML other m 2021-08-18T21:32:48.77
GU.RSP.HNN. ML:1.7 0.00014000000000000001 0.92 AML other m 2021-08-18T21:32:50.24
GU.RSP.HHN. ML:1.8 0.00016900000000000002 0.92 AML other m 2021-08-18T21:32:50.25
GU.RSP.HNE. ML:1.7 0.000127 0.54 AML other m 2021-08-18T21:32:50.36
GU.RSP.HHE. ML:1.8 0.0001535 0.52 AML other m 2021-08-18T21:32:50.10
GU.PZZ.HHN. ML:1.8 0.000157 1.26 AML other m 2021-08-18T21:32:53.66
GU.PZZ.HHE. ML:2.0 0.000246 0.22 AML other m 2021-08-18T21:32:53.74
IV.MONC.HHE. ML:2.1 0.000332 0.22 AML other m 2021-08-18T21:32:53.98
GU.RRL.HHN. ML:1.4 0.00004985 1.04 AML other m 2021-08-18T21:32:55.88
GU.STV.HHE. ML:1.6 0.00006515 0.56 AML other m 2021-08-18T21:32:56.42
IV.MONC.HHN. ML:2.1 0.00031699999999999995 0.86 AML other m 2021-08-18T21:32:57.66
GU.ENR.HHE. ML:2.2 0.000256 0.14 AML other m 2021-08-18T21:32:57.28
GU.RRL.HHE. ML:1.4 0.00004575 1.18 AML other m 2021-08-18T21:32:57.39
GU.STV.HHN. ML:1.4 0.00003845 0.44 AML other m 2021-08-18T21:32:58.29
GU.LSD.HHE. ML:2.0 0.00012545 1.42 AML other m 2021-08-18T21:32:58.95
GU.GBOS.HHE. ML:2.0 0.0001605 0.74 AML other m 2021-08-18T21:32:58.67
GU.LSD.HHN. ML:1.9 0.00009865 0.48 AML other m 2021-08-18T21:32:58.38
MN.BNI.HHN. ML:1.4 0.000034200000000000005 1.48 AML other m 2021-08-18T21:32:58.75
GU.GBOS.HHN. ML:1.9 0.000114 0.9 AML other m 2021-08-18T21:32:58.92
MN.BNI.HHE. ML:1.3 0.0000279 0.94 AML other m 2021-08-18T21:32:59.38
GU.CANO.HHE. ML:2.1 0.00015 0.88 AML other m 2021-08-18T21:33:03.26
FR.SAOF.HHE.00 ML:1.7 0.00005574999999999999 0.52 AML other m 2021-08-18T21:33:03.70
IV.QLNO.HHE. ML:1.7 0.0000547 0.56 AML other m 2021-08-18T21:33:04.42
IV.QLNO.HHN. ML:1.6 0.000043249999999999994 0.32 AML other m 2021-08-18T21:33:04.64
GU.CANO.HHN. ML:2.3 0.0001995 0.28 AML other m 2021-08-18T21:33:05.33
FR.SAOF.HHN.00 ML:1.7 0.00004765 0.62 AML other m 2021-08-18T21:33:05.19
GU.MGRO.HHN. ML:1.8 0.00006534999999999999 0.16 AML other m 2021-08-18T21:33:05.50
GU.IMI.HHE. ML:1.8 0.00005795 0.94 AML other m 2021-08-18T21:33:08.88
IV.MRGE.HHE. ML:1.6 0.00002815 0.64 AML other m 2021-08-18T21:33:08.89
IV.MRGE.HHN. ML:1.7 0.000039750000000000004 1.46 AML other m 2021-08-18T21:33:09.91
GU.MGRO.HHE. ML:1.8 0.00006495 0.48 AML other m 2021-08-18T21:33:09.43
GU.IMI.HHN. ML:1.6 0.000037199999999999996 0.22 AML other m 2021-08-18T21:33:12.58
CH.DIX.HHE. ML:2.3 0.0001119 1.8 AML other m 2021-08-18T21:33:14.03
CH.DIX.HHN. ML:2.2 0.00008395 0.24 AML other m 2021-08-18T21:33:15.56
CH.MUGIO.HHE. ML:1.6 0.0000155 0.48 AML other m 2021-08-18T21:33:29.35
CH.MUGIO.HHN. ML:1.6 0.0000136 0.68 AML other m 2021-08-18T21:33:31.64
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