Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 09-05-2018 and time 06:50:41 (UTC) in region 6 km SW Limone Piemonte (CN)

A magnitude ML 1.1 earthquake occured in region: 6 km SW Limone Piemonte (CN), on

  • 09-05-2018 06:50:41 (UTC)
  • 09-05-2018 08:50:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1650, 7.5300 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Limone Piemonte CN 6 1485 1485
Vernante CN 9 1178 2663
Roaschia CN 13 107 2770
Entracque CN 14 774 3544
Robilante CN 15 2306 5850
Valdieri CN 17 935 6785
Roccavione CN 17 2761 9546
Boves CN 19 9835 19381
Borgo San Dalmazzo CN 19 12468 31849
Briga Alta CN 20 39 31888
Peveragno CN 20 5543 37431

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km S of Cuneo (56081 inhabitants)
43 Km NW of Sanremo (54807 inhabitants)
78 Km W of Savona (61345 inhabitants)
94 Km S of Moncalieri (57294 inhabitants)
98 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
Bulletin
Rev1000 		ML 1.1 2018-05-09
06:50:41		 44.1647 7.5303 8 2019-04-24
14:51:09		 Bollettino Sismico Italiano INGV 66192531
Reviewed
Rev100 		ML 1.2 2018-05-09
06:50:42		 44.1615 7.5242 7 2018-05-09
06:58:01		 Sala Sismica INGV-Roma 56661251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-09 06:50:41 ± 0.1
Latitude 44.1647 ± 0.0063
Longitude 7.5303 ± 0.0075
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 66192531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 710
Semi-minor axis of confidence ellipse (meter) 538
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 17
Circular confidence region, given by single value of horizontal uncertainty (meter) 710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.10072
Epicentral distance of station farthest from the epicenter (degree) 0.81658
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 56661251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-09 06:58:01

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 66192531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-05 14:13:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PZZ.HHZ. 2018-05-09T06:50:58.23 0.3 undecidable manual S 319 50.2164 50 -0.26 67
GU.PCP.HHZ. 2018-05-09T06:50:58.83 0.3 undecidable manual P 62 90.6426 50 1.12 45
GU.RORO.HHZ. 2018-05-09T06:50:56.07 0.3 undecidable manual S 98 43.0236 50 -0.51 64
GU.BURY.HHE. 2018-05-09T06:50:56.24 0.6 undecidable manual S 177 42.4242 50 -0.18 46
IV.IMI.HHZ. 2018-05-09T06:50:55.39 0.6 undecidable manual S 134 40.4262 50 -0.48 44
GU.PZZ.HHZ. 2018-05-09T06:50:52.27 0.6 undecidable manual P 319 50.2164 50 0.79 38
GU.CANO.HHZ. 2018-05-09T06:50:52.63 0.1 undecidable manual P 85 56.3991 50 0.2 90
GU.GBOS.HHZ. 2018-05-09T06:50:51.12 0.6 undecidable manual S 71 26.0517 107 -0.2 47
GU.RORO.HHZ. 2018-05-09T06:50:50.20 0.3 undecidable manual P 98 43.0236 50 -0.17 69
GU.BURY.HHE. 2018-05-09T06:50:50.64 0.3 undecidable manual P 177 42.4242 50 0.36 67
IV.IMI.HHZ. 2018-05-09T06:50:49.90 0.1 undecidable manual P 134 40.4262 50 -0.06 95
FR.SAOF.HHE.00 2018-05-09T06:50:49.29 0.6 undecidable manual S 175 19.869 111 -0.01 50
GU.STV.HHN. 2018-05-09T06:50:48.47 0.3 undecidable manual S 299 18.5703 113 -0.4 69
GU.GBOS.HHZ. 2018-05-09T06:50:47.32 0.1 undecidable manual P 71 26.0517 107 -0.01 99
FR.SAOF.HHE.00 2018-05-09T06:50:46.45 0.6 undecidable manual P 175 19.869 111 0.28 47
GU.ENR.HHE. 2018-05-09T06:50:46.49 0.3 undecidable manual S 308 11.1777 125 -0.1 74
GU.STV.HHN. 2018-05-09T06:50:45.93 0.3 undecidable manual P 299 18.5703 113 0.01 75
GU.ENR.HHE. 2018-05-09T06:50:44.67 0.1 undecidable manual P 308 11.1777 125 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RORO.HHE. ML:1.0 0.00002865 0.46 AML other m 2018-05-09T06:50:57.88
GU.RORO.HHN. ML:1.1 0.00004215 1 AML other m 2018-05-09T06:50:57.92
GU.PZZ.HHE. ML:1.3 0.0000532 0.22 AML other m 2018-05-09T06:50:59.54
GU.PZZ.HHN. ML:1.2 0.000041700000000000004 0.48 AML other m 2018-05-09T06:51:02.71
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