INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.2 on date 12-08-2018 and time 02:16:01 (Italy) in region 4 km SW Valmala (CN)

A magnitude ML 1.2 earthquake occured in region: 4 km SW Valmala (CN), on

  • 12-08-2018 00:16:01 (UTC)
  • 12-08-2018 02:16:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.53, 7.3 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
Valmala CN 4 52 52
Melle CN 4 292 344
San Damiano Macra CN 5 430 774
Cartignano CN 5 190 964
Frassino CN 6 265 1229
Roccabruna CN 6 1585 2814
Brossasco CN 7 1084 3898
Villar San Costanzo CN 8 1547 5445
Dronero CN 8 7035 12480
Venasca CN 9 1437 13917
Isasca CN 9 76 13993
Macra CN 10 59 14052
Rossana CN 11 908 14960
Sampeyre CN 11 1022 15982
Celle di Macra CN 11 100 16082
Montemale di Cuneo CN 11 241 16323
Brondello CN 12 290 16613
Pradleves CN 12 250 16863
Gambasca CN 12 371 17234
Martiniana Po CN 12 734 17968
Monterosso Grana CN 13 505 18473
Piasco CN 13 2774 21247
Sanfront CN 14 2395 23642
Busca CN 14 10181 33823
Stroppo CN 14 103 33926
Pagno CN 14 585 34511
Valgrana CN 14 786 35297
Rifreddo CN 15 1078 36375
Castelmagno CN 15 66 36441
Castellar CN 15 295 36736
Costigliole Saluzzo CN 15 3375 40111
Caraglio CN 16 6836 46947
Revello CN 16 4262 51209
Verzuolo CN 17 6459 57668
Elva CN 17 97 57765
Manta CN 18 3787 61552
Paesana CN 18 2784 64336
Marmora CN 18 68 64404
Envie CN 18 2074 66478
Bernezzo CN 19 4104 70582
Villafalletto CN 19 2925 73507
Oncino CN 19 76 73583
Canosio CN 19 80 73663
Tarantasca CN 20 2122 75785
Casteldelfino CN 20 157 75942

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of Cuneo (56081 inhabitants)
61 Km SW of Moncalieri (57294 inhabitants)
68 Km SW of Torino (890529 inhabitants)
83 Km SW of Asti (76202 inhabitants)
87 Km NW of Sanremo (54807 inhabitants)
97 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 1.2 2018-08-12
00:16:01
44.53 7.3 10 2018-08-12
00:21:03
Sala Sismica INGV-Roma 59650151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-12 00:16:01 ± 0.18
Latitude 44.53 ± 0.01
Longitude 7.30 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59650151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1240
Semi-minor axis of confidence ellipse (meter) 900
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
Circular confidence region, given by single value of horizontal uncertainty (meter) 1240
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.134
Epicentral distance of station farthest from the epicenter (degree) 0.73924
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 59650151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-12 00:21:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CANO.HHZ. 2018-08-12T00:16:25.97 0.1 undecidable manual S 115 0.7392 50 0.25 86
GU.GBOS.HHZ. 2018-08-12T00:16:17.83 0.3 undecidable manual S 126 0.4775 50 -0.12 70
GU.CANO.HHZ. 2018-08-12T00:16:16.20 0.3 undecidable manual P 115 0.7392 50 0.88 52
GU.BHB.HHZ. 2018-08-12T00:16:12.24 0.1 undecidable manual S 355 0.3103 50 -0.76 80
GU.ENR.HHZ. 2018-08-12T00:16:12.34 0.1 undecidable manual S 164 0.3103 50 -0.67 83
GU.GBOS.HHZ. 2018-08-12T00:16:11.30 0.3 undecidable manual P 126 0.4775 50 0.47 65
GU.STV.HHZ. 2018-08-12T00:16:11.59 0.1 undecidable manual S 177 0.2806 50 -0.54 88
GU.BHB.HHZ. 2018-08-12T00:16:08.02 0.6 negative manual P 355 0.3103 50 0.04 49
GU.ENR.HHZ. 2018-08-12T00:16:08.10 0.1 negative manual P 164 0.3103 50 0.12 97
GU.STV.HHZ. 2018-08-12T00:16:07.60 0.6 undecidable manual P 177 0.2806 50 0.13 49
GU.PZZ.HHZ. 2018-08-12T00:16:07.46 0.1 undecidable manual S 262 0.134 124 0.12 100
GU.PZZ.HHZ. 2018-08-12T00:16:05.17 0.1 positive manual P 262 0.134 124 0.47 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHN. ML:1.5 0.0002755 0.54 AML other m 2018-08-12T00:16:07.85
GU.PZZ.HHE. ML:1.5 0.0002825 0.16 AML other m 2018-08-12T00:16:07.72
GU.STV.HHE. ML:1 4.76E-5 0.14 AML other m 2018-08-12T00:16:11.65
GU.STV.HHN. ML:0.9 3.445E-5 0.96 AML other m 2018-08-12T00:16:12.80
GU.ENR.HHE. ML:1.2 6.1E-5 0.86 AML other m 2018-08-12T00:16:12.39
GU.ENR.HHN. ML:1 4.25E-5 0.64 AML other m 2018-08-12T00:16:13.86
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