Earthquake with magnitude of ML 1.2 on date 08-12-2021 and time 12:34:59 (Italy) in region 3 km S Monterosso Grana (CN)

A magnitude ML 1.2 earthquake occured in region: 3 km S Monterosso Grana (CN), on

  • 08-12-2021 11:34:59 (UTC)
  • 08-12-2021 12:34:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.381, 7.332 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
Monterosso Grana CN 3 505 505
Valgrana CN 5 786 1291
Valloriate CN 6 109 1400
Pradleves CN 6 250 1650
Rittana CN 6 109 1759
Montemale di Cuneo CN 7 241 2000
Demonte CN 8 2003 4003
Gaiola CN 8 582 4585
Moiola CN 8 234 4819
Bernezzo CN 8 4104 8923
Caraglio CN 9 6836 15759
Roccasparvera CN 10 741 16500
Castelmagno CN 10 66 16566
Dronero CN 10 7035 23601
Roccabruna CN 11 1585 25186
Cervasca CN 11 5013 30199
Vignolo CN 11 2600 32799
Cartignano CN 11 190 32989
Aisone CN 12 248 33237
Villar San Costanzo CN 12 1547 34784
Valdieri CN 13 935 35719
San Damiano Macra CN 13 430 36149
Borgo San Dalmazzo CN 14 12468 48617
Roccavione CN 14 2761 51378
Vinadio CN 15 644 52022
Roaschia CN 16 107 52129
Entracque CN 16 774 52903
Celle di Macra CN 17 100 53003
Robilante CN 17 2306 55309
Cuneo CN 18 56081 111390
Macra CN 18 59 111449
Valmala CN 18 52 111501
Boves CN 18 9835 121336
Busca CN 19 10181 131517
Rossana CN 20 908 132425

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Cuneo (56081 inhabitants)
72 Km NW of Sanremo (54807 inhabitants)
75 Km SW of Moncalieri (57294 inhabitants)
82 Km SW of Torino (890529 inhabitants)
90 Km SW of Asti (76202 inhabitants)
92 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 1.2 2021-12-08
11:34:59
44.3812 7.3323 11 2021-12-08
11:41:51
Sala Sismica INGV-Roma 98292881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-08 11:34:59 ± 0.17
Latitude 44.3812 ± 0.0117
Longitude 7.3323 ± 0.0214
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 98292881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1982
Semi-minor axis of confidence ellipse (meter) 630
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 231
Circular confidence region, given by single value of horizontal uncertainty (meter) 1980
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.1358
Epicentral distance of station farthest from the epicenter (degree) 0.6628
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 98292881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-08 11:41:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.RRL.HHE. 2021-12-08T11:35:22.60 0.6 undecidable manual S 325 0.6628 50 0.69 39
GU.IMI.HHE. 2021-12-08T11:35:20.60 0.6 undecidable manual S 139 0.6187 50 0 47
GU.BHB.HHE. 2021-12-08T11:35:15.20 0.3 undecidable manual S 354 0.4569 50 -0.6 64
GU.GBOS.HHZ. 2021-12-08T11:35:14.20 0.6 undecidable manual S 111 0.3885 50 0.41 46
FR.SAOF.HHE.00 2021-12-08T11:35:14.20 0.6 undecidable manual S 158 0.4254 50 -0.67 42
GU.RRL.HHE. 2021-12-08T11:35:13.40 0.6 undecidable manual P 325 0.6628 50 0.87 36
GU.IMI.HHE. 2021-12-08T11:35:11.88 0.1 undecidable manual P 139 0.6187 50 0.11 93
GU.GBOS.HHZ. 2021-12-08T11:35:08.18 0.6 positive manual P 111 0.3885 50 0.34 46
FR.SAOF.HHE.00 2021-12-08T11:35:08.47 0.1 undecidable manual P 158 0.4254 50 0.01 98
GU.BHB.HHE. 2021-12-08T11:35:08.23 0.3 undecidable manual P 354 0.4569 50 -0.77 59
GU.PZZ.HHZ. 2021-12-08T11:35:07.90 0.6 undecidable manual S 309 0.1988 50 -0.26 49
GU.ENR.HHZ. 2021-12-08T11:35:06.70 0.6 undecidable manual S 158 0.1637 120 -0.3 49
GU.STV.HHZ. 2021-12-08T11:35:05.60 0.6 undecidable manual S 182 0.1358 125 -0.5 47
GU.ENR.HHZ. 2021-12-08T11:35:04.10 0.1 undecidable manual P 158 0.1637 120 0.19 100
GU.PZZ.HHZ. 2021-12-08T11:35:04.79 0.1 undecidable manual P 309 0.1988 50 0.2 99
GU.STV.HHZ. 2021-12-08T11:35:03.60 0.1 positive manual P 182 0.1358 125 0.2 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHE. ML:1.1 7.3249385E-5 0.1792 AML other m 2021-12-08T11:35:08.64
GU.PZZ.HHN. ML:1.3 0.00013293796 0.1024 AML other m 2021-12-08T11:35:08.67
GU.STV.HHE. ML:0.9 7.5351803E-5 0.0768 AML other m 2021-12-08T11:35:05.80
GU.STV.HHN. ML:0.8 6.68364161E-5 1.5168 AML other m 2021-12-08T11:35:03.59
GU.ENR.HHE. ML:1.2 0.00013184235 0.064 AML other m 2021-12-08T11:35:07.03
GU.ENR.HHN. ML:1.4 0.00018062005 0.0768 AML other m 2021-12-08T11:35:06.99
GU.GBOS.HHE. ML:1.4 8.5540645E-5 2.144 AML other m 2021-12-08T11:35:25.66
GU.GBOS.HHN. ML:1.2 4.9067065185E-5 45.8816 AML other m 2021-12-08T11:35:08.21
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