Earthquake with magnitude of ML 1.2 on date 24-09-2020 and time 18:48:35 (Italy) in region 1 km SE Stroppo (CN)

A magnitude ML 1.2 earthquake occured in region: 1 km SE Stroppo (CN), on

  • 24-09-2020 16:48:35 (UTC)
  • 24-09-2020 18:48:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5, 7.14 at 10 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
Stroppo CN 2 103 103
Macra CN 3 59 162
Celle di Macra CN 4 100 262
Marmora CN 6 68 330
Elva CN 6 97 427
Canosio CN 7 80 507
Prazzo CN 7 170 677
San Damiano Macra CN 9 430 1107
Sampeyre CN 10 1022 2129
Castelmagno CN 11 66 2195
Casteldelfino CN 12 157 2352
Cartignano CN 12 190 2542
Acceglio CN 12 162 2704
Bellino CN 13 109 2813
Frassino CN 14 265 3078
Pradleves CN 14 250 3328
Melle CN 16 292 3620
Roccabruna CN 16 1585 5205
Pontechianale CN 17 179 5384
Valmala CN 17 52 5436
Monterosso Grana CN 18 505 5941
Dronero CN 18 7035 12976
Sambuco CN 19 92 13068
Argentera CN 19 83 13151
Villar San Costanzo CN 19 1547 14698
Pietraporzio CN 19 77 14775
Brossasco CN 19 1084 15859
Montemale di Cuneo CN 20 241 16100

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km W of Cuneo (56081 inhabitants)
71 Km SW of Moncalieri (57294 inhabitants)
77 Km SW of Torino (890529 inhabitants)
91 Km NW of Sanremo (54807 inhabitants)
95 Km W of Asti (76202 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
Reviewed
Rev100
ML 1.2 2020-09-24
16:48:35
44.5 7.14 10 2020-09-24
16:52:59
Sala Sismica INGV-Roma 83204171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-24 16:48:35 ± 0.14
Latitude 44.50 ± 0.01
Longitude 7.14 ± 0.03
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83204171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2348
Semi-minor axis of confidence ellipse (meter) 704
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 2350
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
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) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.01979
Epicentral distance of station farthest from the epicenter (degree) 0.98925
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 6
Type of magnitude ML
Reference to an origin 83204171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-24 16:52:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
RD.ORIF.BHE. 2020-09-24T16:48:54.57 0.6 undecidable manual P 296 0.9893 50 0.71 36
GU.RRL.HHZ. 2020-09-24T16:48:52.13 0.3 undecidable manual S 330 0.4901 50 -0.49 65
GU.RSP.HHZ. 2020-09-24T16:48:48.48 0.3 undecidable manual P 8 0.6556 50 0.33 65
GU.BHB.HHZ. 2020-09-24T16:48:48.02 0.3 undecidable manual S 14 0.3471 50 -0.37 68
GU.GBOS.HHZ. 2020-09-24T16:48:47.37 0.6 undecidable manual P 117 0.5612 50 0.83 37
GU.ENR.HHZ. 2020-09-24T16:48:47.63 0.3 undecidable manual S 144 0.3372 50 -0.45 67
GU.STV.HHZ. 2020-09-24T16:48:46.18 0.1 undecidable manual S 152 0.2851 50 -0.36 92
GU.RRL.HHZ. 2020-09-24T16:48:45.48 0.6 undecidable manual P 330 0.4901 50 0.16 46
GU.BHB.HHZ. 2020-09-24T16:48:43.06 0.3 negative manual P 14 0.3471 50 0.17 71
GU.STV.HHZ. 2020-09-24T16:48:42.14 0.6 undecidable manual P 152 0.2851 50 0.32 46
GU.ENR.HHZ. 2020-09-24T16:48:42.99 0.1 undecidable manual P 144 0.3372 50 0.28 93
GU.PZZ.HHZ. 2020-09-24T16:48:38.47 0.1 undecidable manual S 295 0.0198 167 -0.41 96
GU.PZZ.HHZ. 2020-09-24T16:48:37.61 0.1 undecidable manual P 295 0.0198 167 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHN. ML:2.2 0.00335 0.2 AML other m 2020-09-24T16:48:38.55
GU.PZZ.HHE. ML:2.4 0.004415 0.5 AML other m 2020-09-24T16:48:38.71
GU.STV.HHE. ML:0.9 3.465E-5 1.08 AML other m 2020-09-24T16:48:46.84
GU.STV.HHN. ML:0.9 3.48E-5 1.26 AML other m 2020-09-24T16:48:47.78
GU.ENR.HHE. ML:1.2 5.66E-5 1.22 AML other m 2020-09-24T16:48:48.95
GU.BHB.HHN. ML:1.4 9.22E-5 0.22 AML other m 2020-09-24T16:48:48.33
GU.BHB.HHE. ML:1.4 9.71E-5 0.52 AML other m 2020-09-24T16:48:48.65
GU.ENR.HHN. ML:1.1 5.005E-5 0.84 AML other m 2020-09-24T16:48:50.44
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