Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 10-10-2021 and time 00:40:44 (Italy) in region Confine Italia Svizzera (SVIZZERA)

A magnitude ML 2.3 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 09-10-2021 22:40:44 (UTC)
  • 10-10-2021 00:40:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.9710, 7.4980 at 8 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
Bionaz AO 12 236 236
Valtournenche AO 14 2277 2513
Oyace AO 16 219 2732
Chamois AO 18 97 2829
Torgnon AO 20 558 3387
Ollomont AO 20 157 3544
Antey-Saint-André AO 20 602 4146

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 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 2.3 2021-10-09
22:40:44		 45.9707 7.4978 8 2022-03-30
13:04:27		 Bollettino Sismico Italiano INGV 99440351
Reviewed
Rev100 		ML 2.3 2021-10-09
22:40:43		 45.96 7.5188 4 2021-10-09
23:02:17		 Sala Sismica INGV-Roma 96393011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-09 22:40:44 ± 0.27
Latitude 45.9707 ± 0.0144
Longitude 7.4978 ± 0.0155
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99440351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1481
Semi-minor axis of confidence ellipse (meter) 995
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 337
Circular confidence region, given by single value of horizontal uncertainty (meter) 1480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 27
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.81483
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 99440351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-07 15:36:47

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 96393011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-09 23:02:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FREG.EHZ. 2021-10-09T22:42:40.55 3.0 undecidable manual Sg 24.24 0
IV.CRTC.HHZ. 2021-10-09T22:42:04.05 3.0 undecidable manual Pg 13.68 0
IV.APEC.HHZ. 2021-10-09T22:41:49.12 3.0 positive manual Pn 0.95 0
IV.TREG.EHZ. 2021-10-09T22:41:27.61 3.0 positive manual Pn 2.2 0
IV.MBAL.EHZ. 2021-10-09T22:41:27.27 3.0 negative manual Pn 5.13 0
ST.RONC.EHZ. 2021-10-09T22:41:24.65 3.0 positive manual Pn 5.08 0
IV.SGAL.EHZ. 2021-10-09T22:41:23.49 3.0 negative manual Pg 6.22 0
GU.BHB.HHZ. 2021-10-09T22:41:21.15 0.6 undecidable manual S 188 127.2726 50 0.02 42
GU.RNCA.HHZ. 2021-10-09T22:41:18.17 0.6 undecidable manual P 145 201.4428 38 1.97 12
GU.ENR.HHZ. 2021-10-09T22:41:14.58 0.1 undecidable manual P 182 193.2621 38 -0.61 56
IV.VARE.HHZ. 2021-10-09T22:41:13.20 0.3 undecidable manual S 96 98.8233 50 -0.34 62
GU.RSP.HHZ. 2021-10-09T22:41:12.14 0.6 undecidable manual S 191 93.0402 50 0.15 44
CH.BNALP.HHZ. 2021-10-09T22:41:05.36 0.3 undecidable manual P 35 122.3886 50 0.64 54
CH.GIMEL.HHZ. 2021-10-09T22:41:05.20 0.3 undecidable manual P 304 113.2977 50 1.89 28
GU.BHB.HHZ. 2021-10-09T22:41:05.96 0.3 undecidable manual P 188 127.2726 50 0.5 57
IV.MONC.HHZ. 2021-10-09T22:41:04.43 0.3 undecidable manual P 161 104.9172 50 2.41 17
CH.MUGIO.HHZ. 2021-10-09T22:41:04.78 0.3 undecidable manual P 92 119.1918 50 0.56 56
GU.LSD.HHZ. 2021-10-09T22:41:03.12 0.6 undecidable manual S 207 63.2922 50 -0.94 36
CH.FUSIO.HHZ. 2021-10-09T22:41:02.15 0.3 undecidable manual P 59 104.3178 50 0.22 63
GU.TRAV.HHZ. 2021-10-09T22:41:01.09 0.6 undecidable manual S 159 54.4011 50 -0.58 42
IV.VARE.HHZ. 2021-10-09T22:41:01.61 0.3 undecidable manual P 96 98.8233 50 0.53 60
GU.RSP.HHZ. 2021-10-09T22:41:00.68 0.3 undecidable manual P 191 93.0402 50 0.5 61
GU.BLANC.HHZ. 2021-10-09T22:40:59.28 0.6 undecidable manual S 252 45.7209 50 -0.08 49
IV.MRGE.HHZ. 2021-10-09T22:40:57.08 0.6 undecidable manual S 237 40.4262 50 -0.87 38
GU.CIRO.HHZ. 2021-10-09T22:40:57.39 0.6 undecidable manual S 172 41.2254 50 -0.78 40
CH.MMK.HHZ. 2021-10-09T22:40:55.30 0.6 undecidable manual S 76 37.0296 50 -1.73 24
GU.LSD.HHZ. 2021-10-09T22:40:55.90 0.1 positive manual P 207 63.2922 50 0.29 90
GU.TRAV.HHZ. 2021-10-09T22:40:54.32 0.1 positive manual P 159 54.4011 50 0.09 95
GU.BLANC.HHZ. 2021-10-09T22:40:53.14 0.1 undecidable manual P 252 45.7209 50 0.25 94
GU.CIRO.HHZ. 2021-10-09T22:40:52.18 0.1 positive manual P 172 41.2254 50 -0.03 99
IV.MRGE.HHZ. 2021-10-09T22:40:51.96 0.1 negative manual P 237 40.4262 50 -0.12 97
CH.MMK.HHZ. 2021-10-09T22:40:51.00 0.1 undecidable manual P 76 37.0296 50 -0.55 89
CH.DIX.HHZ. 2021-10-09T22:40:48.51 0.6 undecidable manual S 330 13.9749 120 -1.17 35
CH.DIX.HHZ. 2021-10-09T22:40:47.09 0.1 positive manual P 330 13.9749 120 -0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
CH.DIX.HHE. ML:3.2 0.019899999999999998 0.32 AML other m 2021-10-09T22:40:49.56
CH.DIX.HHN. ML:3.2 0.019049999999999997 1.38 AML other m 2021-10-09T22:40:49.76
CH.MMK.HHN. ML:1.5 0.0001315 0.48 AML other m 2021-10-09T22:40:55.83
IV.MRGE.HHN. ML:2.4 0.0009605 0.34 AML other m 2021-10-09T22:40:57.48
CH.MMK.HHE. ML:1.5 0.00012505 0.4 AML other m 2021-10-09T22:40:57.88
GU.CIRO.HHE. ML:2.2 0.0005304999999999999 0.32 AML other m 2021-10-09T22:40:58.10
IV.MRGE.HHE. ML:2.3 0.000753 0.58 AML other m 2021-10-09T22:40:58.16
GU.CIRO.HHN. ML:2.0 0.00032900000000000003 0.38 AML other m 2021-10-09T22:40:58.61
GU.TRAV.HHN. ML:2.2 0.00039349999999999997 0.6 AML other m 2021-10-09T22:41:01.54
GU.TRAV.HHE. ML:2.2 0.00041049999999999995 0.7 AML other m 2021-10-09T22:41:01.58
GU.LSD.HHE. ML:2.3 0.0003735 0.48 AML other m 2021-10-09T22:41:04.51
GU.LSD.HHN. ML:2.2 0.00029269305000000003 1.68 AML other m 2021-10-09T22:41:04.10
GU.RSP.HNE. ML:2.3 0.0002235 1.02 AML other m 2021-10-09T22:41:13.70
GU.RSP.HHE. ML:2.4 0.0002735 1 AML other m 2021-10-09T22:41:13.70
GU.RSP.HNN. ML:2.3 0.0002305 0.5 AML other m 2021-10-09T22:41:13.39
GU.RSP.HHN. ML:2.4 0.00027649999999999994 0.5 AML other m 2021-10-09T22:41:13.39
IV.VARE.HHN. ML:2.6 0.000367 0.36 AML other m 2021-10-09T22:41:15.37
IV.VARE.HHE. ML:2.4 0.000263 0.34 AML other m 2021-10-09T22:41:16.76
CH.MUGIO.HHE. ML:2.3 0.0001605 1.54 AML other m 2021-10-09T22:41:21.99
CH.MUGIO.HHN. ML:2.4 0.000207 0.6 AML other m 2021-10-09T22:41:21.30
CH.FUSIO.HHE. ML:2.2 0.0001315 0.4 AML other m 2021-10-09T22:41:21.61
GU.BHB.HNN. ML:2.1 0.00009235 0.94 AML other m 2021-10-09T22:41:22.04
CH.FUSIO.HHN. ML:2.1 0.00011949999999999999 0.34 AML other m 2021-10-09T22:41:22.75
CH.GIMEL.HHN. ML:2.4 0.00019800000000000002 1.36 AML other m 2021-10-09T22:41:23.19
GU.BHB.HHN. ML:2.2 0.00009709999999999999 1 AML other m 2021-10-09T22:41:23.54
CH.GIMEL.HHE. ML:2.3 0.000154 0.3 AML other m 2021-10-09T22:41:23.71
GU.BHB.HHE. ML:2.3 0.000147 0.44 AML other m 2021-10-09T22:41:23.52
GU.BHB.HNE. ML:2.4 0.00015900000000000002 0.44 AML other m 2021-10-09T22:41:23.75
CH.BNALP.HHE. ML:2.6 0.000314 0.24 AML other m 2021-10-09T22:41:26.78
CH.BNALP.HHN. ML:2.5 0.000249 0.22 AML other m 2021-10-09T22:41:26.96
GU.ENR.HHE. ML:2.0 0.0000303 0.74 AML other m 2021-10-09T22:41:44.19
GU.ENR.HHN. ML:2.1 0.000039800000000000005 0.52 AML other m 2021-10-09T22:41:46.19
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
Waveforms Seismic signals in miniseed + resp format Download