Earthquake with magnitude of ML 0.9 on date 08-11-2021 and time 13:16:51 (Italy) in region 1 km SW Valgrana (CN)

A magnitude ML 0.9 earthquake occured in region: 1 km SW Valgrana (CN), on

  • 08-11-2021 12:16:51 (UTC)
  • 08-11-2021 13:16:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.403, 7.377 at 2 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
Valgrana CN 1 786 786
Montemale di Cuneo CN 4 241 1027
Monterosso Grana CN 4 505 1532
Caraglio CN 5 6836 8368
Bernezzo CN 5 4104 12472
Rittana CN 6 109 12581
Valloriate CN 7 109 12690
Dronero CN 7 7035 19725
Cervasca CN 8 5013 24738
Pradleves CN 8 250 24988
Gaiola CN 8 582 25570
Roccasparvera CN 9 741 26311
Roccabruna CN 9 1585 27896
Vignolo CN 9 2600 30496
Villar San Costanzo CN 9 1547 32043
Moiola CN 9 234 32277
Cartignano CN 11 190 32467
Demonte CN 12 2003 34470
Borgo San Dalmazzo CN 12 12468 46938
Roccavione CN 13 2761 49699
Castelmagno CN 13 66 49765
San Damiano Macra CN 14 430 50195
Valdieri CN 14 935 51130
Cuneo CN 14 56081 107211
Busca CN 15 10181 117392
Aisone CN 16 248 117640
Roaschia CN 16 107 117747
Valmala CN 16 52 117799
Robilante CN 16 2306 120105
Boves CN 16 9835 129940
Rossana CN 16 908 130848
Tarantasca CN 17 2122 132970
Venasca CN 18 1437 134407
Celle di Macra CN 18 100 134507
Entracque CN 18 774 135281
Melle CN 18 292 135573
Brossasco CN 19 1084 136657
Macra CN 19 59 136716
Vinadio CN 19 644 137360
Piasco CN 20 2774 140134
Costigliole Saluzzo CN 20 3375 143509

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Cuneo (56081 inhabitants)
71 Km SW of Moncalieri (57294 inhabitants)
72 Km NW of Sanremo (54807 inhabitants)
79 Km SW of Torino (890529 inhabitants)
86 Km SW of Asti (76202 inhabitants)
89 Km W of Savona (61345 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2021-11-08
12:16:51
44.4028 7.3767 2 2021-11-08
12:21:46
Sala Sismica INGV-Roma 97341241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-08 12:16:51 ± 0.11
Latitude 44.4028 ± 0.0054
Longitude 7.3767 ± 0.0088
Depth (km) 2 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97341241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 740
Semi-minor axis of confidence ellipse (meter) 520
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 740
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.16188
Epicentral distance of station farthest from the epicenter (degree) 0.77611
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 97341241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-08 12:21:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MONC.HHE. 2021-11-08T12:17:07.49 0.1 undecidable manual P 30 0.7761 50 0.19 91
GU.GBOS.HHZ. 2021-11-08T12:17:05.37 0.6 undecidable manual S 116 0.3687 93 -0.33 48
GU.PZZ.HHZ. 2021-11-08T12:16:59.44 0.6 undecidable manual S 299 0.2131 96 -0.3 50
GU.GBOS.HHZ. 2021-11-08T12:16:59.54 0.1 undecidable manual P 116 0.3687 93 -0.16 100
GU.ENR.HHZ. 2021-11-08T12:16:58.55 0.3 undecidable manual S 170 0.1763 97 0.23 77
GU.STV.HHZ. 2021-11-08T12:16:57.33 0.6 undecidable manual S 193 0.1619 98 -0.45 49
GU.PZZ.HHZ. 2021-11-08T12:16:56.33 0.3 positive manual P 299 0.2131 96 0.07 79
GU.ENR.HHZ. 2021-11-08T12:16:55.84 0.6 negative manual P 170 0.1763 97 0.41 49
GU.STV.HHZ. 2021-11-08T12:16:55.22 0.3 undecidable manual P 193 0.1619 98 0.1 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHE. ML:0.6 3.78E-5 0.16 AML other m 2021-11-08T12:16:57.40
GU.STV.HHN. ML:0.7 4.595E-5 0.56 AML other m 2021-11-08T12:16:57.48
GU.PZZ.HHN. ML:1 6.54E-5 0.26 AML other m 2021-11-08T12:16:59.50
GU.PZZ.HHE. ML:1 6.44E-5 0.88 AML other m 2021-11-08T12:17:00.49
GU.GBOS.HHN. ML:1.1 4.5415395E-5 3.8592 AML other m 2021-11-08T12:17:05.84
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