Earthquake with magnitude of ML 1.4 on date 01-10-2021 and time 08:16:49 (UTC) in region 1 km S Savignone (GE)

A magnitude ML 1.4 earthquake occured in region: 1 km S Savignone (GE), on

  • 01-10-2021 08:16:49 (UTC)
  • 01-10-2021 10:16:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5510, 8.9890 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Savignone GE 2 3205 3205
Casella GE 2 3144 6349
Busalla GE 4 5563 11912
Crocefieschi GE 5 548 12460
Montoggio GE 6 2067 14527
Valbrevenna GE 6 798 15325
Serra Riccò GE 6 7885 23210
Mignanego GE 6 3675 26885
Vobbia GE 7 409 27294
Ronco Scrivia GE 7 4417 31711
Sant'Olcese GE 8 5906 37617
Campomorone GE 9 6996 44613
Ceranesi GE 9 3875 48488
Fraconalto AL 10 336 48824
Isola del Cantone GE 11 1540 50364
Mongiardino Ligure AL 11 165 50529
Davagna GE 12 1884 52413
Torriglia GE 14 2311 54724
Voltaggio AL 14 738 55462
Bargagli GE 14 2708 58170
Roccaforte Ligure AL 15 136 58306
Propata GE 16 142 58448
Genova GE 16 586655 645103
Cabella Ligure AL 16 528 645631
Grondona AL 16 510 646141
Carrega Ligure AL 17 84 646225
Lumarzo GE 17 1535 647760
Arquata Scrivia AL 17 6409 654169
Carrosio AL 17 510 654679
Albera Ligure AL 18 325 655004
Rocchetta Ligure AL 18 200 655204
Rondanina GE 18 62 655266
Bosio AL 19 1227 656493
Vignole Borbera AL 19 2182 658675
Neirone GE 19 916 659591
Cantalupo Ligure AL 19 527 660118
Fascia GE 20 81 660199

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km N of Genova (586655 inhabitants)
48 Km NE of Savona (61345 inhabitants)
50 Km SE of Alessandria (93943 inhabitants)
72 Km S of Pavia (72576 inhabitants)
73 Km SE of Asti (76202 inhabitants)
79 Km SW of Piacenza (102191 inhabitants)
83 Km NW of La Spezia (93959 inhabitants)
86 Km S of Vigevano (63310 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 1.4 2021-10-01
08:16:49
44.5513 8.9887 9 2022-03-30
13:04:19
Bollettino Sismico Italiano INGV 98047561
Reviewed
Rev100
ML 1.5 2021-10-01
08:16:49
44.5607 8.9828 9 2021-10-01
08:31:17
Sala Sismica INGV-Roma 96094731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-01 08:16:49 ± 0.14
Latitude 44.5513 ± 0.0108
Longitude 8.9887 ± 0.0101
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 98047561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1280
Semi-minor axis of confidence ellipse (meter) 525
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 155
Circular confidence region, given by single value of horizontal uncertainty (meter) 1280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.08454
Epicentral distance of station farthest from the epicenter (degree) 0.44426
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 96094731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-01 08:31:17

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 98047561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-02 10:49:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BOB.HHE. 2021-10-01T08:17:05.10 0.3 undecidable manual S 56 43.4232 50 0.75 58
IV.MSSA.HHZ. 2021-10-01T08:17:05.48 0.3 undecidable manual S 122 49.3173 50 -0.43 65
GU.PCP.HHZ. 2021-10-01T08:17:01.94 0.6 undecidable manual S 268 35.0427 50 -0.16 47
IV.MSSA.HHZ. 2021-10-01T08:16:59.21 0.3 undecidable manual P 122 49.3173 50 0.06 70
IV.BOB.HHE. 2021-10-01T08:16:58.60 0.1 undecidable manual P 56 43.4232 50 0.35 89
GU.GORR.HHZ. 2021-10-01T08:16:58.88 0.1 undecidable manual S 75 24.753 111 -0.23 94
GU.PCP.HHZ. 2021-10-01T08:16:56.52 0.1 negative manual P 268 35.0427 50 -0.43 89
IT.GNV.HGZ. 2021-10-01T08:16:55.99 0.1 undecidable manual S 199 13.9749 124 0.22 96
GU.GORR.HHZ. 2021-10-01T08:16:54.85 0.1 negative manual P 75 24.753 111 -0.37 92
GU.RNCA.HHZ. 2021-10-01T08:16:54.44 0.1 undecidable manual S 198 9.3795 135 -0.08 100
IT.GNV.HGZ. 2021-10-01T08:16:53.45 0.1 undecidable manual P 199 13.9749 124 0.16 98
GU.GENL.EHN. 2021-10-01T08:16:53.88 0.6 undecidable manual P 185 16.2726 120 0.21 48
GU.RNCA.HHZ. 2021-10-01T08:16:52.69 0.1 positive manual P 198 9.3795 135 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RNCA.HHE. ML:1.6 0.0005434999999999999 0.14 AML other m 2021-10-01T08:16:54.53
GU.RNCA.HHN. ML:1.5 0.00045599999999999997 0.12 AML other m 2021-10-01T08:16:54.99
GU.GORR.HHN. ML:1.3 0.00011446928 0.16 AML other m 2021-10-01T08:16:59.75
GU.GORR.HHE. ML:1.0 0.00006730507499999999 0.2624 AML other m 2021-10-01T08:16:59.80
GU.PCP.HHN. ML:0.7 0.000019547729999999998 1.4816 AML other m 2021-10-01T08:17:01.97
GU.PCP.HHE. ML:0.8 0.000027447765 0.3776 AML other m 2021-10-01T08:17:02.60
IV.MSSA.HHE. ML:1.8 0.000183 0.1 AML other m 2021-10-01T08:17:06.44
IV.MSSA.HHN. ML:1.8 0.00014900000000000002 0.1 AML other m 2021-10-01T08:17:07.44
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