Earthquake with magnitude of ML 1.7 on date 02-12-2021 and time 10:23:25 (Italy) in region 2 km SW Cavallerleone (CN)

A magnitude ML 1.7 earthquake occured in region: 2 km SW Cavallerleone (CN), on

  • 02-12-2021 09:23:25 (UTC)
  • 02-12-2021 10:23:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.7250, 7.6530 at 35 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
Cavallerleone CN 2 644 644
Cavallermaggiore CN 3 5533 6177
Ruffia CN 4 367 6544
Monasterolo di Savigliano CN 5 1371 7915
Murello CN 5 966 8881
Racconigi CN 5 10038 18919
Villanova Solaro CN 6 772 19691
Scarnafigi CN 8 2162 21853
Savigliano CN 9 21441 43294
Marene CN 9 3175 46469
Caramagna Piemonte CN 9 3034 49503
Torre San Giorgio CN 10 730 50233
Polonghera CN 10 1160 51393
Moretta CN 10 4136 55529
Faule CN 11 486 56015
Casalgrasso CN 11 1480 57495
Sommariva del Bosco CN 12 6361 63856
Sanfrè CN 12 3040 66896
Pancalieri TO 13 2038 68934
Lombriasco TO 13 1050 69984
Villafranca Piemonte TO 13 4729 74713
Lagnasco CN 13 1453 76166
Cardè CN 14 1122 77288
Carmagnola TO 15 29079 106367
Cervere CN 15 2236 108603
Genola CN 15 2625 111228
Saluzzo CN 15 16960 128188
Ceresole Alba CN 16 2090 130278
Bra CN 16 29737 160015
Osasio TO 17 936 160951
Virle Piemonte TO 17 1206 162157
Manta CN 18 3787 165944
Vigone TO 18 5182 171126
Cherasco CN 18 9076 180202
Pocapaglia CN 19 3339 183541
Vottignasco CN 19 537 184078
Verzuolo CN 19 6459 190537
Cercenasco TO 19 1803 192340
Salmour CN 20 704 193044

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km S of Moncalieri (57294 inhabitants)
38 Km N of Cuneo (56081 inhabitants)
39 Km S of Torino (890529 inhabitants)
48 Km W of Asti (76202 inhabitants)
79 Km W of Alessandria (93943 inhabitants)
81 Km NW of Savona (61345 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is 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 shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is 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 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.7 2021-12-02
09:23:25
44.7253 7.6527 35 2022-03-30
13:04:36
Bollettino Sismico Italiano INGV 100801351
Reviewed
Rev100
ML 1.6 2021-12-02
09:23:25
44.7243 7.6568 26 2021-12-02
09:47:38
Sala Sismica INGV-Roma 98044481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-02 09:23:25 ± 0.1
Latitude 44.7253 ± 0.0072
Longitude 7.6527 ± 0.0114
Depth (km) 35 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100801351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 799
Semi-minor axis of confidence ellipse (meter) 554
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
Circular confidence region, given by single value of horizontal uncertainty (meter) 800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0.29768
Epicentral distance of station farthest from the epicenter (degree) 1.36427
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 98044481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-02 09:47:38

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 100801351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-09 14:00:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.IMI.HHZ. 2021-12-02T09:23:52.92 0.6 undecidable manual S 168 0.8328 54 -0.05 46
MN.BNI.HHE. 2021-12-02T09:23:51.52 0.3 undecidable manual S 296 0.7635 54 0.2 67
GU.CIRO.HHZ. 2021-12-02T09:23:50.86 0.6 undecidable manual S 356 0.8777 54 -3.2 2
FR.SAOF.HHZ.00 2021-12-02T09:23:50.25 0.6 undecidable manual S 186 0.7419 54 -0.57 42
GU.RORO.HHZ. 2021-12-02T09:23:48.88 0.6 undecidable manual S 154 0.6799 110 -0.24 45
CH.DIX.HHZ. 2021-12-02T09:23:48.68 0.3 undecidable manual P 353 1.3643 54 0.03 61
GU.RRL.HHZ. 2021-12-02T09:23:48.32 0.6 undecidable manual S 288 0.6421 112 0.25 46
GU.TRAV.HHZ. 2021-12-02T09:23:48.50 0.6 undecidable manual S 5 0.7887 54 -3.44 2
GU.PCP.HHZ. 2021-12-02T09:23:47.76 0.6 undecidable manual S 106 0.6610 111 -0.83 37
IV.QLNO.HHZ. 2021-12-02T09:23:47.42 0.6 undecidable manual S 129 0.6358 112 -0.49 43
GU.ENR.HHZ. 2021-12-02T09:23:44.37 0.6 undecidable manual S 199 0.5234 117 -0.48 45
GU.STV.HHZ. 2021-12-02T09:23:44.25 0.3 undecidable manual S 206 0.5333 116 -0.87 57
GU.GBOS.HHZ. 2021-12-02T09:23:44.06 0.6 undecidable manual S 164 0.5018 118 -0.22 47
GU.RSP.HHZ. 2021-12-02T09:23:43.24 0.6 undecidable manual S 327 0.5036 118 -1.1 36
GU.BURY.HHZ. 2021-12-02T09:23:43.39 0.3 undecidable manual P 184 0.9452 54 0.54 61
IV.MONC.HHZ. 2021-12-02T09:23:42.08 0.6 undecidable manual S 29 0.3984 124 0.41 47
GU.PZZ.HHZ. 2021-12-02T09:23:42.10 0.3 undecidable manual S 240 0.4398 121 -0.6 67
GU.IMI.HHZ. 2021-12-02T09:23:41.93 0.3 undecidable manual P 168 0.8328 54 0.63 60
MN.BNI.HHE. 2021-12-02T09:23:40.92 0.3 undecidable manual P 296 0.7635 54 0.58 61
GU.CIRO.HHZ. 2021-12-02T09:23:40.78 0.3 undecidable manual P 356 0.8777 54 -1.15 49
FR.SAOF.HHZ.00 2021-12-02T09:23:40.18 0.3 undecidable manual P 186 0.7419 54 0.13 70
GU.LSD.HHE. 2021-12-02T09:23:40.72 0.3 undecidable manual P 334 0.8202 54 -0.41 66
GU.RRL.HHZ. 2021-12-02T09:23:39.15 0.3 undecidable manual P 288 0.6421 112 0.68 60
GU.TRAV.HHZ. 2021-12-02T09:23:39.47 0.1 undecidable manual P 5 0.7887 54 -1.23 64
GU.BHB.HHZ. 2021-12-02T09:23:39.46 0.6 undecidable manual S 292 0.2977 133 0.14 51
GU.RORO.HHZ. 2021-12-02T09:23:39.26 0.3 undecidable manual P 154 0.6799 110 0.19 71
IV.QLNO.HHZ. 2021-12-02T09:23:38.66 0.3 undecidable manual P 129 0.6358 112 0.29 70
GU.PCP.HHZ. 2021-12-02T09:23:38.86 0.1 undecidable manual P 106 0.6610 111 0.09 97
GU.ROTM.HHE. 2021-12-02T09:23:37.45 0.3 undecidable manual P 76 0.5117 117 1.02 55
GU.ENR.HHZ. 2021-12-02T09:23:36.79 0.1 undecidable manual P 199 0.5234 117 0.18 97
GU.RSP.HHZ. 2021-12-02T09:23:36.07 0.3 undecidable manual P 327 0.5036 118 -0.24 73
GU.STV.HHZ. 2021-12-02T09:23:36.70 0.1 undecidable manual P 206 0.5333 116 -0.07 98
GU.GBOS.HHZ. 2021-12-02T09:23:36.82 0.3 undecidable manual P 164 0.5018 118 0.54 68
IV.MONC.HHZ. 2021-12-02T09:23:35.39 0.3 undecidable manual P 29 0.3984 124 0.62 66
GU.PZZ.HHZ. 2021-12-02T09:23:35.45 0.1 undecidable manual P 240 0.4398 121 0.08 100
GU.BHB.HHZ. 2021-12-02T09:23:33.80 0.1 negative manual P 292 0.2977 133 0.39 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.BHB.HHN. ML:1.6 0.0001095 0.48 AML other m 2021-12-02T09:23:39.77
GU.BHB.HHE. ML:1.6 0.00010214999999999999 0.08 AML other m 2021-12-02T09:23:39.88
GU.PZZ.HHN. ML:2.0 0.0002 0.34 AML other m 2021-12-02T09:23:42.45
GU.PZZ.HHE. ML:1.8 0.0001187 0.62 AML other m 2021-12-02T09:23:43.09
GU.ENR.HHN. ML:1.8 0.000125 0.06 AML other m 2021-12-02T09:23:44.62
GU.ENR.HHE. ML:2.1 0.0002045 0.08 AML other m 2021-12-02T09:23:44.61
GU.TRAV.HHN. ML:1.6 0.0000474 0.14 AML other m 2021-12-02T09:23:49.47
GU.TRAV.HHE. ML:1.7 0.00005110000000000001 0.3 AML other m 2021-12-02T09:23:49.48
GU.CIRO.HHE. ML:1.4 0.000024550000000000004 0.12 AML other m 2021-12-02T09:23:51.82
GU.CIRO.HHN. ML:1.4 0.000027450000000000003 1.4 AML other m 2021-12-02T09:23:56.13
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols 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