Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 04-04-2020 and time 04:23:11 (UTC) in region 3 km NW Roaschia (CN)

A magnitude ML 1.4 earthquake occured in region: 3 km NW Roaschia (CN), on

  • 04-04-2020 04:23:11 (UTC)
  • 04-04-2020 06:23:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2930, 7.4440 at 12 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Roaschia CN 3 107 107
Roccavione CN 4 2761 2868
Valdieri CN 4 935 3803
Moiola CN 5 234 4037
Robilante CN 5 2306 6343
Borgo San Dalmazzo CN 5 12468 18811
Roccasparvera CN 6 741 19552
Gaiola CN 6 582 20134
Entracque CN 7 774 20908
Rittana CN 7 109 21017
Valloriate CN 8 109 21126
Vignolo CN 8 2600 23726
Vernante CN 9 1178 24904
Boves CN 10 9835 34739
Cervasca CN 10 5013 39752
Bernezzo CN 11 4104 43856
Demonte CN 12 2003 45859
Valgrana CN 14 786 46645
Caraglio CN 14 6836 53481
Cuneo CN 14 56081 109562
Peveragno CN 15 5543 115105
Limone Piemonte CN 15 1485 116590
Monterosso Grana CN 16 505 117095
Montemale di Cuneo CN 17 241 117336
Aisone CN 18 248 117584
Beinette CN 18 3423 121007
Pradleves CN 19 250 121257
Chiusa di Pesio CN 19 3676 124933

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SW of Cuneo (56081 inhabitants)
59 Km NW of Sanremo (54807 inhabitants)
81 Km S of Moncalieri (57294 inhabitants)
83 Km W of Savona (61345 inhabitants)
89 Km S of Torino (890529 inhabitants)
91 Km SW of Asti (76202 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.4 2020-04-04
04:23:11		 44.2932 7.4443 12 2020-04-04
04:39:05		 Sala Sismica INGV-Roma 77858081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-04 04:23:11 ± 0.12
Latitude 44.2932 ± 0.0090
Longitude 7.4443 ± 0.0113
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77858081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 928
Semi-minor axis of confidence ellipse (meter) 652
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 20
Circular confidence region, given by single value of horizontal uncertainty (meter) 930.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
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) 0.06835
Epicentral distance of station farthest from the epicenter (degree) 0.85256
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 77858081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-04 04:39:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PCP.HHZ. 2020-04-04T04:23:38.80 0.6 undecidable manual S 72 91.4418 90 0.48 40
GU.RRL.HHZ. 2020-04-04T04:23:36.83 0.6 undecidable manual S 324 86.6466 90 -0.2 41
IV.QLNO.HHZ. 2020-04-04T04:23:32.61 0.6 undecidable manual S 87 71.6727 90 -0.42 40
GU.CANO.HHZ. 2020-04-04T04:23:30.13 0.6 undecidable manual S 98 63.6918 91 -0.78 35
IV.MONC.HHZ. 2020-04-04T04:23:29.01 0.6 negative manual P 24 94.6386 90 1.57 24
GU.BHB.HHZ. 2020-04-04T04:23:29.22 0.6 undecidable manual S 347 61.7937 91 -1.18 29
GU.PCP.HHZ. 2020-04-04T04:23:28.17 1.0 positive manual P 72 91.4418 90 1.21 15
IV.IMI.HHZ. 2020-04-04T04:23:28.63 0.6 undecidable manual S 140 55.5 91 -0.09 45
GU.RORO.HHZ. 2020-04-04T04:23:27.85 0.6 undecidable manual S 112 53.4021 91 -0.3 43
GU.RRL.HHZ. 2020-04-04T04:23:26.58 0.1 undecidable manual P 324 86.6466 90 0.36 82
IV.QLNO.HHZ. 2020-04-04T04:23:24.22 0.1 undecidable manual P 87 71.6727 90 0.31 85
GU.CANO.HHZ. 2020-04-04T04:23:22.93 0.6 positive manual P 98 63.6918 91 0.25 44
GU.PZZ.HHZ. 2020-04-04T04:23:22.92 0.6 undecidable manual S 312 35.2425 91 -0.38 43
GU.BHB.HHZ. 2020-04-04T04:23:22.17 0.1 undecidable manual P 347 61.7937 91 -0.22 85
FR.SAOF.HHZ.00 2020-04-04T04:23:22.93 0.6 undecidable manual S 166 35.1426 91 -0.36 44
IV.IMI.HHZ. 2020-04-04T04:23:21.89 0.3 positive manual P 140 55.5 91 0.47 63
GU.GBOS.HHZ. 2020-04-04T04:23:21.34 0.6 undecidable manual S 100 31.9458 91 -1.09 32
GU.RORO.HHZ. 2020-04-04T04:23:21.21 0.1 positive manual P 112 53.4021 91 0.12 91
GU.PZZ.HHZ. 2020-04-04T04:23:18.38 0.6 undecidable manual P 312 35.2425 91 0.09 47
FR.SAOF.HHZ.00 2020-04-04T04:23:18.63 0.1 negative manual P 166 35.1426 91 0.35 89
GU.GBOS.HHZ. 2020-04-04T04:23:17.71 0.1 negative manual P 100 31.9458 91 -0.08 93
GU.ENR.HHZ. 2020-04-04T04:23:15.57 0.6 undecidable manual S 194 7.5813 135 -0.63 43
GU.ENR.HHZ. 2020-04-04T04:23:14.23 0.1 undecidable manual P 194 7.5813 135 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.ENR.HHE. ML:2.7 0.0064800000000000005 0.06 AML other m 2020-04-04T04:23:15.61
GU.ENR.HHN. ML:2.4 0.0029699999999999996 0.04 AML other m 2020-04-04T04:23:15.64
GU.GBOS.HHE. ML:1.2 0.00006665000000000001 0.26 AML other m 2020-04-04T04:23:21.48
GU.GBOS.HHN. ML:1.2 0.00007159999999999999 0.2 AML other m 2020-04-04T04:23:21.83
GU.PZZ.HHE. ML:1.6 0.00017649999999999998 0.34 AML other m 2020-04-04T04:23:23.28
GU.PZZ.HHN. ML:1.7 0.000199 0.8 AML other m 2020-04-04T04:23:23.74
FR.SAOF.HHN.00 ML:0.9 0.0000296 0.18 AML other m 2020-04-04T04:23:23.54
FR.SAOF.HHE.00 ML:1.0 0.00003375 1.08 AML other m 2020-04-04T04:23:24.10
IV.IMI.HHE. ML:1.2 0.00004215 1.12 AML other m 2020-04-04T04:23:29.14
IV.IMI.HHN. ML:1.6 0.0000788 0.72 AML other m 2020-04-04T04:23:29.51
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download