Earthquake (quarry blast) with magnitude of ML 0.8 on date 16-05-2018 and time 15:10:27 (Italy) in region 2 km NE Arnasco (SV)

A magnitude ML 0.8 (quarry blast) earthquake occured in region: 2 km NE Arnasco (SV), on

  • 16-05-2018 13:10:27 (UTC)
  • 16-05-2018 15:10:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.09, 8.12 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Arnasco SV 2 645 645
Zuccarello SV 2 309 954
Cisano sul Neva SV 2 2085 3039
Vendone SV 4 388 3427
Castelbianco SV 4 330 3757
Castelvecchio di Rocca Barbena SV 4 145 3902
Ortovero SV 5 1586 5488
Erli SV 5 245 5733
Villanova d'Albenga SV 6 2657 8390
Onzo SV 6 219 8609
Balestrino SV 6 595 9204
Garlenda SV 7 1254 10458
Nasino SV 8 207 10665
Toirano SV 8 2644 13309
Casanova Lerrone SV 9 749 14058
Ranzo IM 9 557 14615
Aquila d'Arroscia IM 9 166 14781
Alto CN 9 128 14909
Albenga SV 9 24213 39122
Ceriale SV 9 5561 44683
Boissano SV 10 2492 47175
Alassio SV 10 10934 58109
Borghetto Santo Spirito SV 11 4948 63057
Stellanello SV 11 808 63865
Bardineto SV 11 756 64621
Borghetto d'Arroscia IM 11 456 65077
Testico SV 12 196 65273
Loano SV 12 11407 76680
Caprauna CN 13 104 76784
Vessalico IM 13 282 77066
Laigueglia SV 13 1810 78876
Garessio CN 14 3244 82120
Villa Faraldi IM 14 444 82564
Giustenice SV 14 977 83541
Cesio IM 15 283 83824
Pietra Ligure SV 15 8992 92816
Andora SV 15 7552 100368
Tovo San Giacomo SV 16 2582 102950
Magliolo SV 16 974 103924
Calizzano SV 16 1475 105399
Armo IM 16 111 105510
Chiusanico IM 16 607 106117
Caravonica IM 17 282 106399
Pieve di Teco IM 17 1338 107737
Diano Arentino IM 17 722 108459
Borgio Verezzi SV 17 2205 110664
Chiusavecchia IM 17 577 111241
Ormea CN 18 1617 112858
Diano San Pietro IM 18 1145 114003
San Bartolomeo al Mare IM 18 3129 117132
Lucinasco IM 18 272 117404
Cervo IM 18 1187 118591
Pontedassio IM 19 2323 120914
Borgomaro IM 19 865 121779
Priola CN 19 701 122480
Diano Castello IM 19 2214 124694
Calice Ligure SV 19 1730 126424
Rialto SV 19 564 126988
Aurigo IM 20 347 127335
Pornassio IM 20 685 128020

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SW of Savona (61345 inhabitants)
40 Km NE of Sanremo (54807 inhabitants)
56 Km SE of Cuneo (56081 inhabitants)
74 Km W of Genova (586655 inhabitants)
90 Km S of Asti (76202 inhabitants)
100 Km SW of Alessandria (93943 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
Rev 1000 ML 0.8 2018-05-16
13:10:27
44.09 8.12 1 2019-04-24
14:51:09
Bollettino Sismico Italiano INGV 66198301
Rev 100 ML 0.8 2018-05-16
13:10:27
44.11 8.1 4 2018-05-16
13:17:38
Sala Sismica INGV-Roma 56920521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-16 13:10:27 ± 0.1
Latitude 44.09 ± 0.01
Longitude 8.12 ± 0.01
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 66198301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 710
Semi-minor axis of confidence ellipse (meter) 440
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 315
Circular confidence region, given by single value of horizontal uncertainty (meter) 710
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 185
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.04137
Epicentral distance of station farthest from the epicenter (degree) 0.24821
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 66198301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-05 16:49:09

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 56920521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-16 13:17:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IMI.HHZ. 2018-05-16T13:10:32.83 0.3 undecidable manual P 222 0.2419 91 0 74
GU.MGRO.HHZ. 2018-05-16T13:10:32.48 0.3 undecidable manual P 258 0.2266 91 -0.01 74
GU.GBOS.HHZ. 2018-05-16T13:10:32.83 0.3 undecidable manual P 307 0.2482 91 -0.15 72
GU.CANO.HHZ. 2018-05-16T13:10:30.68 0.3 negative manual P 37 0.1448 92 0.01 75
GU.RORO.HHZ. 2018-05-16T13:10:28.49 0.1 undecidable manual P 300 0.0414 96 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RORO.HHE. ML:0 0.0003729868 0.096 AML other m 2018-05-16T13:10:29.29
GU.RORO.HHN. ML:0 0.00032735295 0.16 AML other m 2018-05-16T13:10:29.85
GU.CANO.HHN. ML:0.9 8.924133E-5 0.2176 AML other m 2018-05-16T13:10:33.20
GU.CANO.HHE. ML:1.1 0.0001413254 0.3392 AML other m 2018-05-16T13:10:33.59
GU.GBOS.HHE. ML:0.5 2.044416E-5 0.1376 AML other m 2018-05-16T13:10:36.13
GU.GBOS.HHN. ML:0.5 1.793071E-5 0.9792 AML other m 2018-05-16T13:10:36.51
IV.IMI.HHE. ML:0 2.328009E-5 0.2432 AML other m 2018-05-16T13:10:38.56
IV.IMI.HHN. ML:0.8 3.870572E-5 0.16 AML other m 2018-05-16T13:10:37.60
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