Earthquake with magnitude of ML 1.6 on date 22-02-2020 and time 09:10:08 (Italy) in region 2 km N Roccabruna (CN)

A magnitude ML 1.6 earthquake occured in region: 2 km N Roccabruna (CN), on

  • 22-02-2020 08:10:08 (UTC)
  • 22-02-2020 09:10:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.5, 7.34 at 5 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
Roccabruna CN 2 1585 1585
Villar San Costanzo CN 4 1547 3132
Dronero CN 4 7035 10167
Cartignano CN 5 190 10357
Valmala CN 5 52 10409
San Damiano Macra CN 7 430 10839
Montemale di Cuneo CN 7 241 11080
Melle CN 7 292 11372
Brossasco CN 8 1084 12456
Venasca CN 9 1437 13893
Rossana CN 9 908 14801
Frassino CN 10 265 15066
Pradleves CN 10 250 15316
Monterosso Grana CN 10 505 15821
Valgrana CN 10 786 16607
Isasca CN 11 76 16683
Busca CN 11 10181 26864
Caraglio CN 11 6836 33700
Piasco CN 12 2774 36474
Brondello CN 13 290 36764
Macra CN 13 59 36823
Celle di Macra CN 13 100 36923
Costigliole Saluzzo CN 14 3375 40298
Castelmagno CN 14 66 40364
Bernezzo CN 14 4104 44468
Martiniana Po CN 15 734 45202
Gambasca CN 15 371 45573
Pagno CN 15 585 46158
Sampeyre CN 15 1022 47180
Castellar CN 16 295 47475
Verzuolo CN 16 6459 53934
Cervasca CN 16 5013 58947
Tarantasca CN 16 2122 61069
Sanfront CN 17 2395 63464
Villafalletto CN 17 2925 66389
Stroppo CN 17 103 66492
Rittana CN 17 109 66601
Rifreddo CN 17 1078 67679
Manta CN 18 3787 71466
Valloriate CN 18 109 71575
Revello CN 18 4262 75837
Vignolo CN 19 2600 78437
Gaiola CN 19 582 79019
Roccasparvera CN 19 741 79760
Marmora CN 20 68 79828

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NW of Cuneo (56081 inhabitants)
62 Km SW of Moncalieri (57294 inhabitants)
70 Km SW of Torino (890529 inhabitants)
82 Km SW of Asti (76202 inhabitants)
83 Km NW of Sanremo (54807 inhabitants)
93 Km W of Savona (61345 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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
Rev 100 ML 1.6 2020-02-22
08:10:08
44.5 7.34 5 2020-02-22
08:24:05
Sala Sismica INGV-Roma 76715261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-22 08:10:08 ± 0.21
Latitude 44.50 ± 0.01
Longitude 7.34 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76715261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1410
Semi-minor axis of confidence ellipse (meter) 910
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 1410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.48
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.43977
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 76715261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-22 08:24:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2020-02-22T08:11:45.00 3.0 positive manual Pn -1.77 0
IV.FIU.EHZ. 2020-02-22T08:11:41.00 3.0 undecidable manual Sn 0.14 0
IV.FIR.HHZ. 2020-02-22T08:10:56.59 3.0 undecidable manual Pn 2.96 0
IV.MRGE.HHZ. 2020-02-22T08:10:39.13 3.0 undecidable manual Sn -0.55 0
IV.EUCT.HNZ. 2020-02-22T08:10:33.15 3.0 negative manual Pn 0.48 0
GU.GBOS.HHZ. 2020-02-22T08:10:25.03 0.6 undecidable manual S 125 0.4398 50 -0.56 44
GU.BHB.HHE. 2020-02-22T08:10:21.04 0.3 undecidable manual S 351 0.3408 98 -1 56
GU.ENR.HHZ. 2020-02-22T08:10:19.10 0.6 undecidable manual S 168 0.277 99 -0.51 46
GU.GBOS.HHZ. 2020-02-22T08:10:18.86 0.1 undecidable manual P 125 0.4398 50 0.37 92
GU.STV.HHZ. 2020-02-22T08:10:17.87 0.6 undecidable manual S 182 0.2527 100 -0.8 41
GU.BHB.HHE. 2020-02-22T08:10:16.83 0.1 undecidable manual P 351 0.3408 98 0.4 93
GU.ENR.HHZ. 2020-02-22T08:10:15.36 0.1 negative manual P 168 0.277 99 0.33 96
GU.STV.HHZ. 2020-02-22T08:10:14.72 0.6 negative manual P 182 0.2527 100 0.23 49
GU.PZZ.HHZ. 2020-02-22T08:10:14.94 0.1 undecidable manual S 273 0.1601 106 -0.24 100
GU.PZZ.HHZ. 2020-02-22T08:10:12.95 0.1 positive manual P 273 0.1601 106 0.48 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHN. ML:1.7 0.0005005 0.1 AML other m 2020-02-22T08:10:15.14
GU.PZZ.HHE. ML:1.7 0.0004265 0.38 AML other m 2020-02-22T08:10:15.11
GU.ENR.HHN. ML:1.4 0.000134 1.06 AML other m 2020-02-22T08:10:19.65
GU.ENR.HHE. ML:1.5 0.000165 0.34 AML other m 2020-02-22T08:10:19.61
IV.EUCT.HNE. ML:3.4 0.001171 0.28 AML other m 2020-02-22T08:10:35.98
IV.EUCT.HNN. ML:3.5 0.001355 0.28 AML other m 2020-02-22T08:10:35.92
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download