Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 03-10-2021 and time 15:04:30 (UTC) in region 1 km SW Montoggio (GE)

A magnitude ML 1.6 earthquake occured in region: 1 km SW Montoggio (GE), on

  • 03-10-2021 15:04:30 (UTC)
  • 03-10-2021 17:04:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5050, 9.0370 at 9 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
Montoggio GE 1 2067 2067
Casella GE 5 3144 5211
Sant'Olcese GE 6 5906 11117
Davagna GE 6 1884 13001
Valbrevenna GE 6 798 13799
Savignone GE 8 3205 17004
Bargagli GE 8 2708 19712
Serra Riccò GE 8 7885 27597
Crocefieschi GE 9 548 28145
Torriglia GE 10 2311 30456
Mignanego GE 10 3675 34131
Busalla GE 10 5563 39694
Lumarzo GE 11 1535 41229
Vobbia GE 11 409 41638
Ceranesi GE 11 3875 45513
Campomorone GE 11 6996 52509
Ronco Scrivia GE 13 4417 56926
Genova GE 13 586655 643581
Neirone GE 14 916 644497
Propata GE 14 142 644639
Bogliasco GE 14 4488 649127
Uscio GE 14 2284 651411
Pieve Ligure GE 15 2544 653955
Mongiardino Ligure AL 15 165 654120
Sori GE 16 4205 658325
Rondanina GE 16 62 658387
Fraconalto AL 16 336 658723
Tribogna GE 16 614 659337
Avegno GE 17 2525 661862
Carrega Ligure AL 17 84 661946
Moconesi GE 17 2614 664560
Isola del Cantone GE 17 1540 666100
Montebruno GE 17 240 666340
Fascia GE 17 81 666421
Recco GE 18 9752 676173
Favale di Malvaro GE 19 466 676639
Cicagna GE 19 2502 679141
Roccaforte Ligure AL 19 136 679277
Cabella Ligure AL 19 528 679805
Camogli GE 20 5378 685183

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NE of Genova (586655 inhabitants)
49 Km E of Savona (61345 inhabitants)
56 Km SE of Alessandria (93943 inhabitants)
76 Km S of Pavia (72576 inhabitants)
77 Km NW of La Spezia (93959 inhabitants)
79 Km SE of Asti (76202 inhabitants)
80 Km SW of Piacenza (102191 inhabitants)
92 Km S of Vigevano (63310 inhabitants)
97 Km W of Carrara (63133 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 2021-10-03
15:04:30		 44.5052 9.0367 9 2022-03-30
13:04:33		 Bollettino Sismico Italiano INGV 100418061
Reviewed
Rev100 		ML 1.6 2021-10-03
15:04:30		 44.5043 9.0368 9 2021-10-03
15:19:22		 Sala Sismica INGV-Roma 96173741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-03 15:04:30 ± 0.09
Latitude 44.5052 ± 0.0090
Longitude 9.0367 ± 0.0076
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100418061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1086
Semi-minor axis of confidence ellipse (meter) 371
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 157
Circular confidence region, given by single value of horizontal uncertainty (meter) 1090.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86695
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 100418061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-31 23:35:40

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 96173741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-03 15:19:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ESAL.HHZ. 2021-10-03T15:06:30.04 3.0 undecidable manual Pn 1.23 0
IV.MF5.EHZ. 2021-10-03T15:06:27.30 3.0 undecidable manual Sg 19.549999 0
IT.RMVT.HGZ. 2021-10-03T15:06:21.85 3.0 undecidable manual Sg 13.13 0
IV.NRCA.HHZ. 2021-10-03T15:06:20.19 3.0 undecidable manual Sg 16.040001 0
IV.ILOS.HNZ. 2021-10-03T15:06:18.76 3.0 positive manual Pn -1.01 0
IV.PTQR.HHZ. 2021-10-03T15:06:17.74 3.0 undecidable manual Sn -2.11 0
IV.MNTT.EHZ. 2021-10-03T15:06:14.70 3.0 undecidable manual Sn 5.55 0
IV.FOSV.EHZ. 2021-10-03T15:06:04.50 3.0 undecidable manual Sg 11.28 0
IV.CERA.HNZ. 2021-10-03T15:05:51.21 3.0 undecidable manual Pg 10.51 0
IV.POFI.HHZ. 2021-10-03T15:05:42.81 3.0 undecidable manual Pn 5.58 0
IV.ASSB.HHZ. 2021-10-03T15:05:28.56 3.0 undecidable manual Pg 10.71 0
IV.ZEN8.EHZ. 2021-10-03T15:05:04.10 3.0 undecidable manual Pg 4.78 0
GU.EQUI.HHZ. 2021-10-03T15:04:47.73 0.1 undecidable manual P 113 96.2259 50 0.24 83
GU.CANO.HHE. 2021-10-03T15:04:44.05 0.6 undecidable manual P 243 71.4729 50 0.38 43
GU.PCP.HHZ. 2021-10-03T15:04:44.00 0.3 undecidable manual S 276 39.0276 50 -0.3 69
IV.BOB.HNZ. 2021-10-03T15:04:39.82 0.1 undecidable manual P 48 43.623 50 0.44 88
GU.GORR.HHZ. 2021-10-03T15:04:39.20 0.3 undecidable manual S 61 23.1546 111 -0.43 69
GU.PCP.HHZ. 2021-10-03T15:04:38.48 0.1 undecidable manual P 276 39.0276 50 -0.19 94
IV.MSSA.HHZ. 2021-10-03T15:04:38.95 0.1 undecidable manual P 119 43.5231 50 -0.41 89
GU.GENL.EHZ. 2021-10-03T15:04:36.10 0.3 undecidable manual S 206 12.2766 127 -0.19 74
GU.GORR.HHZ. 2021-10-03T15:04:36.05 0.1 undecidable manual P 61 23.1546 111 0.07 99
IT.GNV.HGZ. 2021-10-03T15:04:36.00 0.3 undecidable manual S 225 11.5773 128 -0.12 75
GU.RNCA.HHZ. 2021-10-03T15:04:35.10 0.3 undecidable manual S 241 7.7811 140 -0.04 77
IT.GNV.HGZ. 2021-10-03T15:04:34.12 0.1 undecidable manual P 225 11.5773 128 0.17 99
GU.GENL.EHZ. 2021-10-03T15:04:34.16 0.1 undecidable manual P 206 12.2766 127 0.11 100
GU.RNCA.HHZ. 2021-10-03T15:04:33.61 0.1 positive manual P 241 7.7811 140 0.22 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RNCA.HHN. ML:1.5 0.0004465 0.22 AML other m 2021-10-03T15:04:35.23
GU.RNCA.HHE. ML:1.7 0.0007099999999999999 0.14 AML other m 2021-10-03T15:04:35.35
GU.GENL.EHN. ML:1.5 0.00039049999999999995 0.32 AML other m 2021-10-03T15:04:36.45
GU.GENL.EHE. ML:1.6 0.0005189999999999999 1.08 AML other m 2021-10-03T15:04:36.26
GU.GORR.HHN. ML:1.6 0.000251 0.16 AML other m 2021-10-03T15:04:39.83
GU.GORR.HHE. ML:1.5 0.0002275 0.14 AML other m 2021-10-03T15:04:39.82
IV.MSSA.HHN. ML:1.8 0.00020400000000000003 0.44 AML other m 2021-10-03T15:04:44.59
IV.MSSA.HHE. ML:1.8 0.0001965 0.28 AML other m 2021-10-03T15:04:46.45
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