Earthquake with magnitude of ML 1.0 on date 08-12-2021 and time 23:17:09 (Italy) in region 5 km NW Demonte (CN)

A magnitude ML 1.0 earthquake occured in region: 5 km NW Demonte (CN), on

  • 08-12-2021 22:17:09 (UTC)
  • 08-12-2021 23:17:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.357, 7.263 at 11 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
Demonte CN 5 2003 2003
Aisone CN 6 248 2251
Pradleves CN 7 250 2501
Castelmagno CN 7 66 2567
Monterosso Grana CN 8 505 3072
Vinadio CN 9 644 3716
Valloriate CN 9 109 3825
Moiola CN 11 234 4059
Rittana CN 11 109 4168
Valgrana CN 11 786 4954
Gaiola CN 12 582 5536
Montemale di Cuneo CN 13 241 5777
Cartignano CN 14 190 5967
Valdieri CN 14 935 6902
Bernezzo CN 14 4104 11006
Roccasparvera CN 14 741 11747
Dronero CN 15 7035 18782
San Damiano Macra CN 15 430 19212
Roccabruna CN 15 1585 20797
Sambuco CN 15 92 20889
Caraglio CN 15 6836 27725
Celle di Macra CN 16 100 27825
Vignolo CN 17 2600 30425
Cervasca CN 17 5013 35438
Entracque CN 17 774 36212
Villar San Costanzo CN 17 1547 37759
Macra CN 17 59 37818
Marmora CN 17 68 37886
Roccavione CN 18 2761 40647
Canosio CN 18 80 40727
Borgo San Dalmazzo CN 18 12468 53195
Roaschia CN 18 107 53302
Pietraporzio CN 18 77 53379
Stroppo CN 20 103 53482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km W of Cuneo (56081 inhabitants)
73 Km NW of Sanremo (54807 inhabitants)
79 Km SW of Moncalieri (57294 inhabitants)
86 Km SW of Torino (890529 inhabitants)
96 Km SW of Asti (76202 inhabitants)
97 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 1.0 2021-12-08
22:17:09
44.3573 7.2627 11 2021-12-08
22:26:03
Sala Sismica INGV-Roma 98319881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-08 22:17:09 ± 0.15
Latitude 44.3573 ± 0.0153
Longitude 7.2627 ± 0.0302
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98319881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2876
Semi-minor axis of confidence ellipse (meter) 254
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 236
Circular confidence region, given by single value of horizontal uncertainty (meter) 2880
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 167
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.12141
Epicentral distance of station farthest from the epicenter (degree) 0.9335
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 98319881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-08 22:26:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PCP.HHE. 2021-12-08T22:17:28.27 0.6 undecidable manual P 78 0.9335 50 0.89 33
FR.SAOF.HHE.00 2021-12-08T22:17:24.55 0.6 undecidable manual S 151 0.4254 50 -0.56 42
GU.CANO.HHZ. 2021-12-08T22:17:23.96 0.3 undecidable manual P 102 0.7132 50 0.35 63
GU.RRL.HHE. 2021-12-08T22:17:22.82 0.1 undecidable manual P 329 0.6556 50 0.19 88
GU.RORO.HHZ. 2021-12-08T22:17:21.88 0.6 undecidable manual P 113 0.6259 50 -0.23 44
GU.BHB.HHE. 2021-12-08T22:17:18.80 0.3 undecidable manual P 0 0.4775 50 -0.79 57
FR.SAOF.HHE.00 2021-12-08T22:17:18.85 0.3 undecidable manual P 151 0.4254 50 0.16 70
GU.PZZ.HHZ. 2021-12-08T22:17:17.59 0.6 undecidable manual S 325 0.1826 118 -0.27 48
GU.ENR.HHZ. 2021-12-08T22:17:16.94 0.3 undecidable manual S 139 0.17 119 -0.5 68
GU.STV.HHZ. 2021-12-08T22:17:15.84 0.6 undecidable manual S 158 0.1214 128 -0.04 51
GU.PZZ.HHZ. 2021-12-08T22:17:14.59 0.1 undecidable manual P 325 0.1826 118 0.08 99
GU.ENR.HHZ. 2021-12-08T22:17:14.31 0.1 undecidable manual P 139 0.17 119 0.05 100
GU.STV.HHZ. 2021-12-08T22:17:13.80 0.1 undecidable manual P 158 0.1214 128 0.43 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHE. ML:0.3 2.175534E-5 0.4608 AML other m 2021-12-08T22:17:20.97
GU.STV.HHN. ML:0.5 3.1802225E-5 0.1024 AML other m 2021-12-08T22:17:15.96
GU.ENR.HHE. ML:1 7.8688025E-5 0.0384 AML other m 2021-12-08T22:17:17.36
GU.ENR.HHN. ML:1.1 9.7354265E-5 0.064 AML other m 2021-12-08T22:17:17.18
GU.PZZ.HHE. ML:0.9 6.106021E-5 0.1408 AML other m 2021-12-08T22:17:18.01
GU.PZZ.HHN. ML:1.1 8.43387E-5 0.1408 AML other m 2021-12-08T22:17:17.82
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