Earthquake with magnitude of ML 0.6 on date 20-09-2020 and time 02:44:27 (UTC) in region 3 km N Gavi (AL)

A magnitude ML 0.6 earthquake occured in region: 3 km N Gavi (AL), on

  • 20-09-2020 02:44:27 (UTC)
  • 20-09-2020 04:44:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.72, 8.8 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
Gavi AL 3 4614 4614
Tassarolo AL 3 672 5286
Serravalle Scrivia AL 4 6128 11414
San Cristoforo AL 5 608 12022
Novi Ligure AL 5 28154 40176
Stazzano AL 5 2486 42662
Pasturana AL 6 1318 43980
Parodi Ligure AL 6 715 44695
Francavilla Bisio AL 6 531 45226
Carrosio AL 7 510 45736
Vignole Borbera AL 7 2182 47918
Arquata Scrivia AL 7 6409 54327
Bosio AL 7 1227 55554
Cassano Spinola AL 8 1731 57285
Montaldeo AL 8 265 57550
Castelletto d'Orba AL 9 2047 59597
Pozzolo Formigaro AL 9 4775 64372
Mornese AL 9 737 65109
Capriata d'Orba AL 9 1904 67013
Sardigliano AL 9 406 67419
Gavazzana AL 10 180 67599
Basaluzzo AL 10 2087 69686
Casaleggio Boiro AL 11 372 70058
Voltaggio AL 11 738 70796
Silvano d'Orba AL 11 1988 72784
Lerma AL 11 869 73653
Borghetto di Borbera AL 11 1966 75619
Sant'Agata Fossili AL 12 425 76044
Fresonara AL 12 731 76775
Predosa AL 12 2048 78823
Villalvernia AL 12 955 79778
Grondona AL 13 510 80288
Carezzano AL 13 431 80719
Rocca Grimalda AL 13 1512 82231
Tagliolo Monferrato AL 14 1581 83812
Paderna AL 14 220 84032
Castellania AL 14 90 84122
Isola del Cantone GE 14 1540 85662
Fraconalto AL 15 336 85998
Spineto Scrivia AL 15 337 86335
Belforte Monferrato AL 15 515 86850
Ovada AL 15 11477 98327
Costa Vescovato AL 15 335 98662
Bosco Marengo AL 16 2457 101119
Carbonara Scrivia AL 16 1122 102241
Carpeneto AL 16 977 103218
Avolasca AL 16 294 103512
Villaromagnano AL 17 715 104227
Ronco Scrivia GE 17 4417 108644
Frugarolo AL 17 1968 110612
Garbagna AL 17 696 111308
Montaldo Bormida AL 17 664 111972
Cerreto Grue AL 18 323 112295
Trisobbio AL 18 655 112950
Roccaforte Ligure AL 18 136 113086
Montegioco AL 18 313 113399
Cantalupo Ligure AL 19 527 113926
Molare AL 19 2181 116107
Sarezzano AL 19 1171 117278
Cremolino AL 19 1086 118364
Orsara Bormida AL 19 424 118788
Busalla GE 19 5563 124351
Rocchetta Ligure AL 20 200 124551
Casal Cermelli AL 20 1234 125785
Sezzadio AL 20 1246 127031
Rossiglione GE 20 2779 129810

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SE of Alessandria (93943 inhabitants)
35 Km NW of Genova (586655 inhabitants)
52 Km E of Asti (76202 inhabitants)
52 Km NE of Savona (61345 inhabitants)
59 Km SW of Pavia (72576 inhabitants)
67 Km S of Vigevano (63310 inhabitants)
80 Km W of Piacenza (102191 inhabitants)
83 Km S of Novara (104380 inhabitants)
89 Km SW of Milano (1345851 inhabitants)
93 Km S of Rho (50434 inhabitants)
94 Km E of Moncalieri (57294 inhabitants)
97 Km E of Torino (890529 inhabitants)
97 Km SW of Sesto San Giovanni (81608 inhabitants)
98 Km S of Legnano (60262 inhabitants)
99 Km SW of Cinisello Balsamo (75078 inhabitants)
100 Km S of Busto Arsizio (83106 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
Reviewed
Rev100
ML 0.6 2020-09-20
02:44:27
44.71 8.8 10 2020-09-20
02:55:37
Sala Sismica INGV-Roma 83042951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-20 02:44:27 ± 0.16
Latitude 44.71 ± 0.01
Longitude 8.80 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83042951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1005
Semi-minor axis of confidence ellipse (meter) 551
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 110
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 160
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 12
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
Epicentral distance of station farthest from the epicenter (degree) 0.8004
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 83042951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-20 02:55:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NDIM.HHZ. 2020-09-20T02:45:16.59 3.0 undecidable manual Sg 0.99 0
GU.RORO.HHE. 2020-09-20T02:44:55.05 0.6 undecidable manual S 221 0.8004 50 0.81 48
GU.MGRO.HHZ. 2020-09-20T02:44:47.91 3.0 undecidable manual Pg 4.15 0
IV.QLNO.HHE. 2020-09-20T02:44:45.62 0.6 undecidable manual S 220 0.509 50 0.01 64
IV.IMI.HHZ. 2020-09-20T02:44:44.34 3.0 undecidable manual P -0.43 0
GU.RORO.HHE. 2020-09-20T02:44:43.18 0.3 undecidable manual P 221 0.8004 50 0.1 89
GU.GORR.HHE. 2020-09-20T02:44:41.06 0.6 undecidable manual S 107 0.3633 50 -0.23 63
GU.RNCA.HHZ. 2020-09-20T02:44:39.05 0.6 undecidable manual S 157 0.2644 50 0.68 57
GU.PCP.HHZ. 2020-09-20T02:44:38.15 0.6 undecidable manual S 227 0.2527 50 0.12 66
IV.QLNO.HHE. 2020-09-20T02:44:37.75 0.3 undecidable manual P 220 0.509 50 -0.35 90
IV.SARZ.HHZ. 2020-09-20T02:44:35.87 0.6 undecidable manual S 27 0.1709 118 0.59 60
GU.GORR.HHE. 2020-09-20T02:44:35.52 0.3 undecidable manual P 107 0.3633 50 -0.08 98
GU.PCP.HHZ. 2020-09-20T02:44:33.28 0.3 undecidable manual P 227 0.2527 50 -0.44 93
GU.RNCA.HHZ. 2020-09-20T02:44:33.73 0.3 undecidable manual P 157 0.2644 50 -0.19 97
IV.SARZ.HHZ. 2020-09-20T02:44:31.98 0.3 undecidable manual P 27 0.1709 118 -0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SARZ.HNE. ML:1.2 0.000120502865 0.64 AML other m 2020-09-20T02:44:39.73
IV.SARZ.HNN. ML:1.3 0.00015440865 0.72 AML other m 2020-09-20T02:44:38.23
GU.PCP.HHE. ML:0.5 1.69260715E-5 0.36 AML other m 2020-09-20T02:44:38.55
GU.PCP.HHN. ML:0.5 1.268650475E-5 0.16 AML other m 2020-09-20T02:44:38.35
GU.RNCA.HHE. ML:0.5 1.5192855E-5 0.28 AML other m 2020-09-20T02:44:39.00
GU.RNCA.HHN. ML:0.3 1.0777949E-5 0.32 AML other m 2020-09-20T02:44:39.15
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