Earthquake with magnitude of ML 1.4 on date 23-02-2020 and time 16:33:16 (Italy) in region 5 km SW Frassino (CN)

A magnitude ML 1.4 earthquake occured in region: 5 km SW Frassino (CN), on

  • 23-02-2020 15:33:16 (UTC)
  • 23-02-2020 16:33:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.54, 7.23 at 7 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
Frassino CN 5 265 265
Macra CN 6 59 324
San Damiano Macra CN 6 430 754
Sampeyre CN 6 1022 1776
Celle di Macra CN 7 100 1876
Melle CN 8 292 2168
Cartignano CN 8 190 2358
Stroppo CN 9 103 2461
Valmala CN 9 52 2513
Roccabruna CN 11 1585 4098
Elva CN 11 97 4195
Brossasco CN 11 1084 5279
Dronero CN 13 7035 12314
Villar San Costanzo CN 13 1547 13861
Isasca CN 13 76 13937
Venasca CN 14 1437 15374
Pradleves CN 14 250 15624
Marmora CN 14 68 15692
Gambasca CN 14 371 16063
Casteldelfino CN 14 157 16220
Castelmagno CN 14 66 16286
Sanfront CN 14 2395 18681
Canosio CN 15 80 18761
Martiniana Po CN 15 734 19495
Prazzo CN 15 170 19665
Brondello CN 16 290 19955
Montemale di Cuneo CN 16 241 20196
Rifreddo CN 16 1078 21274
Oncino CN 16 76 21350
Monterosso Grana CN 16 505 21855
Rossana CN 16 908 22763
Paesana CN 17 2784 25547
Bellino CN 18 109 25656
Ostana CN 18 83 25739
Pagno CN 18 585 26324
Revello CN 18 4262 30586
Valgrana CN 19 786 31372
Piasco CN 19 2774 34146
Pontechianale CN 19 179 34325
Castellar CN 19 295 34620
Crissolo CN 19 168 34788
Busca CN 20 10181 44969
Envie CN 20 2074 47043

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Cuneo (56081 inhabitants)
63 Km SW of Moncalieri (57294 inhabitants)
70 Km SW of Torino (890529 inhabitants)
87 Km W of Asti (76202 inhabitants)
91 Km NW of Sanremo (54807 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 1.4 2020-02-23
15:33:16
44.54 7.23 7 2020-02-23
16:24:14
Sala Sismica INGV-Roma 76758061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-23 15:33:16 ± 0.16
Latitude 44.54 ± 0.01
Longitude 7.23 ± 0.02
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76758061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1419
Semi-minor axis of confidence ellipse (meter) 569
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) 1420
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.93709
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 76758061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-23 16:24:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2020-02-23T15:34:05.55 3.0 undecidable manual Pn 0.22 0
IV.CRMI.HHZ. 2020-02-23T15:33:59.72 3.0 undecidable manual Pn 0.56 0
IV.SBPO.HNZ. 2020-02-23T15:33:55.58 3.0 negative manual Pn 0.43 0
GU.PCP.HHE. 2020-02-23T15:33:48.90 0.6 undecidable manual S 89 0.9371 50 0.86 44
IV.IMI.HHZ. 2020-02-23T15:33:43.32 0.3 undecidable manual S 143 0.7851 50 -0.23 83
GU.RSP.HHZ. 2020-02-23T15:33:37.68 0.3 undecidable manual S 2 0.6115 50 -0.73 75
GU.GBOS.HHE. 2020-02-23T15:33:35.29 0.3 undecidable manual S 124 0.5261 50 -0.57 81
GU.PCP.HHE. 2020-02-23T15:33:35.85 0.3 undecidable manual P 89 0.9371 50 1 62
GU.RRL.HHZ. 2020-02-23T15:33:34.50 0.6 undecidable manual S 321 0.4946 50 -0.44 56
IV.IMI.HHZ. 2020-02-23T15:33:32.90 0.6 undecidable manual P 143 0.7851 50 0.64 50
GU.ENR.HHZ. 2020-02-23T15:33:29.45 0.6 undecidable manual S 156 0.3381 100 -0.61 55
GU.RSP.HHZ. 2020-02-23T15:33:29.94 0.6 undecidable manual P 2 0.6115 50 0.65 51
GU.GBOS.HHE. 2020-02-23T15:33:28.23 0.3 undecidable manual P 124 0.5261 50 0.41 85
GU.BHB.HHE. 2020-02-23T15:33:27.90 0.3 undecidable manual S 5 0.2995 101 -0.68 81
GU.STV.HHZ. 2020-02-23T15:33:27.67 0.3 undecidable manual S 167 0.2986 101 -0.89 74
GU.RRL.HHZ. 2020-02-23T15:33:27.39 1.0 undecidable manual P 321 0.4946 50 0.1 30
GU.ENR.HHZ. 2020-02-23T15:33:24.57 0.3 undecidable manual P 156 0.3381 100 0.11 94
GU.BHB.HHE. 2020-02-23T15:33:23.97 0.6 undecidable manual P 5 0.2995 101 0.35 60
GU.STV.HHZ. 2020-02-23T15:33:23.80 0.3 undecidable manual P 167 0.2986 101 0.2 93
GU.PZZ.HHZ. 2020-02-23T15:33:20.90 0.3 undecidable manual S 250 0.0863 124 0.03 100
GU.PZZ.HHZ. 2020-02-23T15:33:19.66 0.3 undecidable manual P 250 0.0863 124 0.5 91
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.ENR.HHE. ML:0 0.00013333685 0.0512 AML other m 2020-02-23T15:33:30.64
GU.ENR.HHN. ML:0 8.656871E-5 0.0512 AML other m 2020-02-23T15:33:30.86
GU.PZZ.HHE. ML:1.8 0.001036957 0.2176 AML other m 2020-02-23T15:33:21.13
GU.PZZ.HHN. ML:1.6 0.00071753855 0.1408 AML other m 2020-02-23T15:33:21.08
GU.STV.HHE. ML:0.9 3.30032E-5 0.1024 AML other m 2020-02-23T15:33:28.05
GU.STV.HHN. ML:1 4.463396E-5 0.1024 AML other m 2020-02-23T15:33:28.17
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