Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-05-2018 and time 16:29:02 (Italy) in region 2 km W Gavi (AL)

A magnitude ML 1.6 earthquake occured in region: 2 km W Gavi (AL), on

  • 28-05-2018 14:29:02 (UTC)
  • 28-05-2018 16:29:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.6970, 8.7840 at 7 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
Gavi AL 2 4614 4614
San Cristoforo AL 3 608 5222
Parodi Ligure AL 3 715 5937
Tassarolo AL 4 672 6609
Montaldeo AL 5 265 6874
Bosio AL 5 1227 8101
Carrosio AL 6 510 8611
Francavilla Bisio AL 6 531 9142
Castelletto d'Orba AL 7 2047 11189
Serravalle Scrivia AL 7 6128 17317
Pasturana AL 7 1318 18635
Mornese AL 7 737 19372
Novi Ligure AL 7 28154 47526
Stazzano AL 8 2486 50012
Casaleggio Boiro AL 8 372 50384
Arquata Scrivia AL 8 6409 56793
Capriata d'Orba AL 8 1904 58697
Vignole Borbera AL 9 2182 60879
Lerma AL 9 869 61748
Silvano d'Orba AL 9 1988 63736
Voltaggio AL 10 738 64474
Cassano Spinola AL 10 1731 66205
Basaluzzo AL 10 2087 68292
Pozzolo Formigaro AL 11 4775 73067
Rocca Grimalda AL 11 1512 74579
Tagliolo Monferrato AL 11 1581 76160
Predosa AL 12 2048 78208
Sardigliano AL 12 406 78614
Gavazzana AL 12 180 78794
Fresonara AL 12 731 79525
Belforte Monferrato AL 13 515 80040
Ovada AL 13 11477 91517
Borghetto di Borbera AL 13 1966 93483
Fraconalto AL 14 336 93819
Carpeneto AL 14 977 94796
Grondona AL 14 510 95306
Sant'Agata Fossili AL 15 425 95731
Villalvernia AL 15 955 96686
Isola del Cantone GE 15 1540 98226
Montaldo Bormida AL 15 664 98890
Carezzano AL 15 431 99321
Trisobbio AL 16 655 99976
Paderna AL 16 220 100196
Castellania AL 16 90 100286
Bosco Marengo AL 16 2457 102743
Molare AL 17 2181 104924
Ronco Scrivia GE 17 4417 109341
Cremolino AL 17 1086 110427
Spineto Scrivia AL 17 337 110764
Rossiglione GE 17 2779 113543
Orsara Bormida AL 17 424 113967
Costa Vescovato AL 18 335 114302
Frugarolo AL 18 1968 116270
Carbonara Scrivia AL 18 1122 117392
Rivalta Bormida AL 19 1446 118838
Avolasca AL 19 294 119132
Campo Ligure GE 19 2955 122087
Morsasco AL 19 679 122766
Busalla GE 19 5563 128329
Villaromagnano AL 19 715 129044
Prasco AL 19 521 129565
Sezzadio AL 19 1246 130811
Castelnuovo Bormida AL 19 694 131505
Roccaforte Ligure AL 20 136 131641
Garbagna AL 20 696 132337
Castelspina AL 20 416 132753
Cerreto Grue AL 20 323 133076
Casal Cermelli AL 20 1234 134310

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SE of Alessandria (93943 inhabitants)
34 Km NW of Genova (586655 inhabitants)
49 Km NE of Savona (61345 inhabitants)
51 Km E of Asti (76202 inhabitants)
62 Km SW of Pavia (72576 inhabitants)
69 Km S of Vigevano (63310 inhabitants)
82 Km W of Piacenza (102191 inhabitants)
84 Km S of Novara (104380 inhabitants)
91 Km SW of Milano (1345851 inhabitants)
93 Km E of Moncalieri (57294 inhabitants)
95 Km S of Rho (50434 inhabitants)
96 Km E of Torino (890529 inhabitants)
100 Km SW of Sesto San Giovanni (81608 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 1.6 2018-05-28
14:29:02		 44.6973 8.784 7 2019-04-24
14:50:45		 Bollettino Sismico Italiano INGV 57787621
Reviewed
Rev100 		ML 1.7 2018-05-28
14:29:02		 44.7472 8.8075 25 2018-05-28
14:50:08		 Sala Sismica INGV-Roma 57316111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-28 14:29:02 ± 0.37
Latitude 44.6973 ± 0.0153
Longitude 8.7840 ± 0.0316
Depth (km) 7 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 57787621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2490
Semi-minor axis of confidence ellipse (meter) 1670
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 2490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.51
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.64661
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 57787621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-13 10:53:22

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 57316111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-28 14:50:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LRP.EHZ. 2018-05-28T14:30:18.92 3.0 undecidable manual Pn 5.46 0
IV.ASSB.HHZ. 2018-05-28T14:30:12.25 3.0 undecidable manual Pg 19.08 0
IV.FIAM.HHZ. 2018-05-28T14:30:08.69 3.0 positive manual Pn 4.76 0
IV.NARO.HHZ. 2018-05-28T14:30:03.54 3.0 undecidable manual Pg 15.98 0
IV.CESI.HHZ. 2018-05-28T14:30:01.56 3.0 undecidable manual Pn 6.19 0
IV.CSP1.EHZ. 2018-05-28T14:30:01.98 3.0 undecidable manual Pn 5.08 0
IV.FDMO.HHZ. 2018-05-28T14:30:01.74 3.0 positive manual Pn 5.26 0
IV.T1221.EHZ. 2018-05-28T14:30:00.59 3.0 undecidable manual Pn 4.32 0
IV.TERO.HHZ. 2018-05-28T14:29:59.89 3.0 positive manual Pn -4.26 0
ST.PANI.EHZ. 2018-05-28T14:29:59.59 3.0 undecidable manual Sn 1.4 0
IV.MC2.EHZ. 2018-05-28T14:29:59.21 3.0 undecidable manual Pn 0.84 0
IV.RM33.EHZ. 2018-05-28T14:29:58.31 3.0 negative manual Pn -3.98 0
IV.MTRA.EHZ. 2018-05-28T14:29:57.51 3.0 undecidable manual Pn -3.85 0
IV.LNSS.HHZ. 2018-05-28T14:29:57.92 3.0 negative manual Pn -2.2 0
IV.SMA1.EHZ. 2018-05-28T14:29:57.28 3.0 positive manual Pn -4.77 0
IV.NRCA.HHZ. 2018-05-28T14:29:57.75 3.0 negative manual Pn -0.77 0
IV.IMOL.HNZ. 2018-05-28T14:29:32.49 3.0 positive manual Pn -2.34 0
IV.MSSA.HHZ. 2018-05-28T14:29:25.77 0.6 undecidable manual S 126 71.7726 50 0.42 42
GU.GORR.HHZ. 2018-05-28T14:29:16.51 0.6 undecidable manual S 104 41.3253 50 -0.72 40
IV.MSSA.HHZ. 2018-05-28T14:29:16.69 0.1 undecidable manual P 126 71.7726 50 0.84 73
GU.CANO.HHZ. 2018-05-28T14:29:15.26 0.3 undecidable manual P 219 69.4749 50 -0.23 66
IV.ZONE.HHZ. 2018-05-28T14:29:12.82 3.0 undecidable manual P 0.56 0
IV.SARZ.HHZ. 2018-05-28T14:29:10.85 0.6 undecidable manual S 28 21.4674 109 0.12 49
GU.GORR.HHZ. 2018-05-28T14:29:10.62 0.1 undecidable manual P 104 41.3253 50 -0.54 87
IV.SARZ.HHZ. 2018-05-28T14:29:07.48 0.1 undecidable manual P 28 21.4674 109 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SARZ.HHE. ML:2.0 0.0007191365000000001 0.4032 AML other m 2018-05-28T14:29:11.36
IV.SARZ.HNE. ML:2.0 0.0006856427 0.4032 AML other m 2018-05-28T14:29:11.37
IV.SARZ.HHN. ML:1.9 0.00058987295 0.2624 AML other m 2018-05-28T14:29:13.00
IV.SARZ.HNN. ML:1.8 0.0005200233 0.2624 AML other m 2018-05-28T14:29:13.00
GU.GORR.HHE. ML:1.5 0.00011371767 0.2048 AML other m 2018-05-28T14:29:16.92
GU.GORR.HHN. ML:1.6 0.00013767395 0.256 AML other m 2018-05-28T14:29:17.15
GU.RNCA.HHE. ML:0.6 0.00002215083 0.3584 AML other m 2018-05-28T14:29:18.05
GU.RNCA.HHN. ML:0.7 0.0000269542 0.1984 AML other m 2018-05-28T14:29:18.05
IV.MSSA.HHN. ML:1.1 0.00002207472 1.0176 AML other m 2018-05-28T14:29:21.55
IV.MSSA.HHE. ML:1.3 0.00003336501 1.0368 AML other m 2018-05-28T14:29:25.17
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