Earthquake with magnitude of ML 2.3 on date 01-10-2020 and time 10:25:52 (Italy) in region 5 km SW Valgrisenche (AO)

A magnitude ML 2.3 earthquake occured in region: 5 km SW Valgrisenche (AO), on

  • 01-10-2020 08:25:52 (UTC)
  • 01-10-2020 10:25:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.609, 7.016 at 10 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Valgrisenche AO 5 196 196
Rhêmes-Notre-Dame AO 9 89 285
Rhêmes-Saint-Georges AO 12 194 479
La Thuile AO 13 761 1240
Avise AO 15 305 1545
Valsavarenche AO 15 161 1706
Arvier AO 16 873 2579
La Salle AO 16 2087 4666
Introd AO 16 658 5324
Morgex AO 17 2104 7428
Saint-Nicolas AO 17 311 7739
Pré-Saint-Didier AO 18 1050 8789
Villeneuve AO 18 1289 10078

Municipalities with at least 50000 inhabitants

An earthquake occurred to
79 Km NW of Torino (890529 inhabitants)
85 Km NW of Moncalieri (57294 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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
Bulletin
Rev1000
ML 2.3 2020-10-01
08:25:52
45.6088 7.0163 10 2021-02-26
14:55:58
Bollettino Sismico Italiano INGV 83734461
Reviewed
Rev100
ML 2.4 2020-10-01
08:25:52
45.6148 7.0017 8 2020-10-01
08:32:41
Sala Sismica INGV-Roma 83409431
Reviewed
Rev100
ML 2.4 2020-10-01
08:25:52
45.6192 7.0168 10 2020-10-01
08:31:09
Sala Sismica INGV-Roma 83409401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-01 08:25:52 ± 0.11
Latitude 45.6088 ± 0.0045
Longitude 7.0163 ± 0.0103
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83734461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 659
Semi-minor axis of confidence ellipse (meter) 543
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 298
Circular confidence region, given by single value of horizontal uncertainty (meter) 660
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 42
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) 0.16368
Epicentral distance of station farthest from the epicenter (degree) 1.80764
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 46
Type of magnitude ML
Reference to an origin 83734461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-12 15:05:37

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 83409431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-01 08:32:41

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 83409401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-01 08:31:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.MGRO.HHZ. 2020-10-01T08:26:43.47 3.0 undecidable manual S 160 1.6628 38 -0.6 0
GU.ENR.HHZ. 2020-10-01T08:26:36.67 1.0 undecidable manual S 168 1.4101 50 -0.32 18
GU.STV.HHZ. 2020-10-01T08:26:35.75 1.0 undecidable manual S 171 1.3796 50 -0.33 18
IV.VARE.HHZ. 2020-10-01T08:26:32.99 0.3 undecidable manual S 77 1.2501 50 0.75 49
GU.PZZ.HHZ. 2020-10-01T08:26:27.70 0.3 undecidable manual S 176 1.1035 50 -0.19 60
CH.GIMEL.HHZ. 2020-10-01T08:26:27.36 0.6 undecidable manual S 331 1.0612 50 0.73 34
RD.ORIF.BHZ. 2020-10-01T08:26:26.15 0.3 undecidable manual S 230 1.0558 50 -0.34 59
IV.IMI.HHZ. 2020-10-01T08:26:25.34 0.6 undecidable manual P 160 1.8076 38 1.11 21
GU.MGRO.HHZ. 2020-10-01T08:26:22.54 0.1 undecidable manual P 160 1.6628 38 0.31 62
FR.SAOF.HHZ.00 2020-10-01T08:26:22.43 0.6 undecidable manual P 167 1.6655 38 0.16 32
GU.CANO.HHZ. 2020-10-01T08:26:21.63 0.6 undecidable manual P 148 1.6458 38 -0.36 31
GU.BHB.HHZ. 2020-10-01T08:26:18.01 0.3 undecidable manual S 167 0.7923 50 -0.67 56
GU.STV.HHZ. 2020-10-01T08:26:17.66 0.1 undecidable manual P 171 1.3796 50 0.04 76
GU.ENR.HHZ. 2020-10-01T08:26:17.95 0.1 undecidable manual P 168 1.4101 50 -0.19 73
CH.MMK.HHN. 2020-10-01T08:26:17.94 0.6 undecidable manual S 56 0.7941 50 -0.78 36
IV.VARE.HHZ. 2020-10-01T08:26:16.17 0.6 undecidable manual P 77 1.2501 50 0.77 32
GU.RRL.HHZ. 2020-10-01T08:26:15.48 0.3 undecidable manual S 193 0.706 50 -0.62 58
GU.SATI.HHZ. 2020-10-01T08:26:14.52 0.6 undecidable manual S 66 0.6511 50 0.03 46
CH.GIMEL.HHZ. 2020-10-01T08:26:13.10 0.3 undecidable manual P 331 1.0612 50 0.94 47
GU.PZZ.HHZ. 2020-10-01T08:26:13.58 0.1 undecidable manual P 176 1.1035 50 0.69 69
RD.ORIF.BHZ. 2020-10-01T08:26:12.59 0.1 undecidable manual P 230 1.0558 50 0.51 75
MN.BNI.HHZ. 2020-10-01T08:26:11.90 0.3 undecidable manual S 203 0.6052 50 -1.23 45
CH.DIX.HHZ. 2020-10-01T08:26:10.56 0.3 undecidable manual S 30 0.5441 50 -0.76 57
GU.TRAV.HHZ. 2020-10-01T08:26:10.22 0.3 undecidable manual S 100 0.5198 50 -0.39 65
GU.RSP.HHZ. 2020-10-01T08:26:09.13 0.3 undecidable manual S 159 0.4919 50 -0.66 60
CH.MMK.HHN. 2020-10-01T08:26:08.12 0.3 undecidable manual P 56 0.7941 50 0.52 60
GU.BHB.HHZ. 2020-10-01T08:26:08.08 0.1 undecidable manual P 167 0.7923 50 0.51 80
GU.RRL.HHZ. 2020-10-01T08:26:06.23 0.1 positive manual P 193 0.706 50 0.14 88
GU.CIRO.HHZ. 2020-10-01T08:26:05.96 0.3 undecidable manual S 91 0.3858 50 -0.67 61
GU.SATI.HHZ. 2020-10-01T08:26:05.74 0.1 undecidable manual P 66 0.6511 50 0.58 80
MN.BNI.HHZ. 2020-10-01T08:26:04.25 0.1 negative manual P 203 0.6052 50 -0.12 90
GU.TRAV.HHZ. 2020-10-01T08:26:03.36 0.1 positive manual P 100 0.5198 50 0.45 86
CH.DIX.HHZ. 2020-10-01T08:26:03.61 0.1 undecidable manual P 30 0.5441 50 0.28 88
GU.RSP.HHZ. 2020-10-01T08:26:02.51 0.1 positive manual P 159 0.4919 50 0.07 93
GU.REMY.HHZ. 2020-10-01T08:26:01.68 0.3 undecidable manual S 23 0.2491 109 -0.86 58
GU.BLANC.HHZ. 2020-10-01T08:26:01.59 0.3 undecidable manual S 346 0.2428 110 -0.71 62
GU.CIRO.HHZ. 2020-10-01T08:26:00.76 0.1 positive manual P 91 0.3858 50 0.14 94
GU.LSD.HHZ. 2020-10-01T08:25:59.63 0.3 undecidable manual S 151 0.1709 117 -0.12 74
GU.BLANC.HHZ. 2020-10-01T08:25:58.00 0.1 positive manual P 346 0.2428 110 -0.12 97
IV.MRGE.HHZ. 2020-10-01T08:25:58.85 0.6 undecidable manual S 11 0.1637 118 -0.68 43
GU.REMY.HHZ. 2020-10-01T08:25:58.31 0.1 negative manual P 23 0.2491 109 0.06 98
GU.LSD.HHZ. 2020-10-01T08:25:57.02 0.1 positive manual P 151 0.1709 117 0.38 93
IV.MRGE.HHZ. 2020-10-01T08:25:56.57 0.1 negative manual P 11 0.1637 118 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.LSD.HHN. ML:2.5 0.0025 0.1 AML other m 2020-10-01T08:25:59.73
GU.LSD.HHE. ML:2.6 0.00293 0.1 AML other m 2020-10-01T08:25:59.69
IV.MRGE.HHN. ML:2.7 0.003895 0.56 AML other m 2020-10-01T08:25:59.98
IV.MRGE.HHE. ML:2.6 0.00353 0.64 AML other m 2020-10-01T08:26:00.15
GU.BLANC.HHN. ML:2.6 0.00198 0.3 AML other m 2020-10-01T08:26:01.84
GU.BLANC.HHE. ML:2.5 0.00191 1.78 AML other m 2020-10-01T08:26:01.10
GU.REMY.HHE. ML:2.4 0.00126 0.18 AML other m 2020-10-01T08:26:02.65
GU.REMY.HHN. ML:2.4 0.001225 1.56 AML other m 2020-10-01T08:26:03.02
GU.CIRO.HHN. ML:2.3 0.000704 0.34 AML other m 2020-10-01T08:26:06.27
GU.CIRO.HHE. ML:2 0.0003225 0.8 AML other m 2020-10-01T08:26:07.03
GU.RSP.HHN. ML:2.6 0.000882 0.64 AML other m 2020-10-01T08:26:11.16
GU.RSP.HHE. ML:2.6 0.0010405 0.18 AML other m 2020-10-01T08:26:11.58
GU.RSP.HNE. ML:2.6 0.0009295 0.18 AML other m 2020-10-01T08:26:11.58
GU.RSP.HNN. ML:2.5 0.0008165 0.66 AML other m 2020-10-01T08:26:11.16
GU.TRAV.HHN. ML:2.4 0.0006045 0.5 AML other m 2020-10-01T08:26:11.91
CH.DIX.HHE. ML:2.9 0.001775 0.34 AML other m 2020-10-01T08:26:11.94
CH.DIX.HHN. ML:2.9 0.00162 1.24 AML other m 2020-10-01T08:26:11.35
MN.BNI.HHE. ML:2.1 0.0002145 0.46 AML other m 2020-10-01T08:26:12.62
MN.BNI.HNE. ML:2.1 0.000221 0.46 AML other m 2020-10-01T08:26:12.62
MN.BNI.HHN. ML:2.2 0.0002685 0.32 AML other m 2020-10-01T08:26:12.57
MN.BNI.HNN. ML:2.2 0.000263 0.32 AML other m 2020-10-01T08:26:12.58
GU.TRAV.HHE. ML:2.4 0.000479 0.24 AML other m 2020-10-01T08:26:12.76
GU.SATI.HHE. ML:2 0.0001655 0.12 AML other m 2020-10-01T08:26:17.07
GU.RRL.HHN. ML:2.4 0.000341 1.1 AML other m 2020-10-01T08:26:17.34
GU.RRL.HHE. ML:2.5 0.0004505 0.56 AML other m 2020-10-01T08:26:17.60
GU.SATI.HHN. ML:2 0.0001505 0.5 AML other m 2020-10-01T08:26:18.68
GU.BHB.HHE. ML:2.4 0.000289 0.58 AML other m 2020-10-01T08:26:19.46
GU.BHB.HHN. ML:2.5 0.0003605 1.42 AML other m 2020-10-01T08:26:20.87
RD.ORIF.BHE. ML:2.1 8.765E-5 0.52 AML other m 2020-10-01T08:26:29.50
GU.PZZ.HHN. ML:2.7 0.0003795 0.26 AML other m 2020-10-01T08:26:29.73
RD.ORIF.BHN. ML:2.1 9.735E-5 0.48 AML other m 2020-10-01T08:26:30.88
GU.PZZ.HHE. ML:2.7 0.0003845 0.86 AML other m 2020-10-01T08:26:31.40
IV.VARE.HHE. ML:2.1 7.74E-5 0.56 AML other m 2020-10-01T08:26:35.21
GU.STV.HHE. ML:1.8 3.615E-5 0.74 AML other m 2020-10-01T08:26:38.71
GU.ENR.HHN. ML:2.1 6.075E-5 1.52 AML other m 2020-10-01T08:26:38.91
GU.STV.HHN. ML:1.8 3.44E-5 0.9 AML other m 2020-10-01T08:26:39.40
GU.ENR.HHE. ML:2.2 7.295E-5 1.4 AML other m 2020-10-01T08:26:39.02
IV.VARE.HHN. ML:2.1 7.075E-5 0.52 AML other m 2020-10-01T08:26:43.27
GU.CANO.HHE. ML:2.4 0.00010075 0.68 AML other m 2020-10-01T08:26:48.33
GU.MGRO.HHN. ML:2.1 4.005E-5 0.48 AML other m 2020-10-01T08:26:48.48
GU.CANO.HHN. ML:2.4 9.595E-5 1.42 AML other m 2020-10-01T08:26:49.95
GU.MGRO.HHE. ML:2.2 5.015E-5 0.88 AML other m 2020-10-01T08:26:50.87
FR.SAOF.HHN.00 ML:2.2 5.165E-5 1.44 AML other m 2020-10-01T08:26:56.85
IV.IMI.HHN. ML:2.5 8.345E-5 0.58 AML other m 2020-10-01T08:26:56.56
FR.SAOF.HHE.00 ML:2.1 4.365E-5 1.2 AML other m 2020-10-01T08:26:57.04
IV.IMI.HHE. ML:2.5 9.195E-5 1.26 AML other m 2020-10-01T08:27:00.30
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
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