Earthquake with magnitude of ML 1.7 on date 30-12-2021 and time 14:13:48 (Italy) in region Mar Ligure (MARE)

A magnitude ML 1.7 earthquake occured in region: Mar Ligure (MARE), on

  • 30-12-2021 13:13:48 (UTC)
  • 30-12-2021 14:13:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.8710, 9.0950 at 22 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
62 Km S of Genova (586655 inhabitants)
64 Km W of La Spezia (93959 inhabitants)
69 Km SE of Savona (61345 inhabitants)
84 Km W of Carrara (63133 inhabitants)
86 Km W of Massa (69479 inhabitants)
93 Km W of Viareggio (62467 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 1.7 2021-12-30
13:13:48
43.871 9.095 22 2022-03-30
13:04:25
Bollettino Sismico Italiano INGV 99256141
Reviewed
Rev100
ML 1.7 2021-12-30
13:13:48
43.8385 9.1078 19 2021-12-30
13:27:23
Sala Sismica INGV-Roma 99148731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-30 13:13:48 ± 0.17
Latitude 43.8710 ± 0.0153
Longitude 9.0950 ± 0.0087
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99256141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1594
Semi-minor axis of confidence ellipse (meter) 624
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 187
Circular confidence region, given by single value of horizontal uncertainty (meter) 1590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.32380
Number of stations at which the event was observed 38
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 99256141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-03 11:21:58

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 99148731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-30 13:27:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.LNT.HGZ. 2021-12-30T13:16:03.93 3.0 undecidable manual P 2.011 0
AC.PUK.HHZ. 2021-12-30T13:15:54.14 3.0 undecidable manual P 8.16 0
CR.STON.BHZ. 2021-12-30T13:15:47.18 3.0 positive manual P 2.567 0
SL.KOGS.BHZ. 2021-12-30T13:15:37.87 3.0 undecidable manual P 2.529 0
IV.VIVA.HHZ. 2021-12-30T13:15:33.71 3.0 undecidable manual Sg -4.03 0
IV.CMPR.HHZ. 2021-12-30T13:15:32.19 3.0 positive manual P 1.797 0
IV.PP3.EHZ. 2021-12-30T13:15:31.26 3.0 undecidable manual Sg 0.68 0
CR.ZAG.BHZ. 2021-12-30T13:15:27.12 3.0 negative manual P 2.014 0
IV.SGRT.HHZ. 2021-12-30T13:15:25.78 3.0 undecidable manual P 1.84 0
OT.OT12.EHZ. 2021-12-30T13:15:25.43 3.0 negative manual P 1.578 0
IV.ARVD.HHZ. 2021-12-30T13:15:21.10 3.0 undecidable manual Sg 2.77 0
IV.FOSV.EHZ. 2021-12-30T13:15:13.40 3.0 undecidable manual Sg -3.49 0
IV.ZEN8.EHZ. 2021-12-30T13:14:50.88 3.0 undecidable manual Sn -0.77 0
IV.GAVE.EHZ. 2021-12-30T13:14:47.12 3.0 positive manual P 1.162 0
IV.MC2.EHZ. 2021-12-30T13:14:42.22 3.0 negative manual P 5.03 0
IV.SSFR.HHZ. 2021-12-30T13:14:35.17 3.0 negative manual P 3.76 0
GU.STV.HHN. 2021-12-30T13:14:29.22 0.6 undecidable manual S 287 146.9418 54 -0.92 35
GU.POPM.HHZ. 2021-12-30T13:14:27.51 0.6 undecidable manual S 81 134.0658 95 0.43 42
GU.GBOS.HHE. 2021-12-30T13:14:19.65 0.6 undecidable manual S 293 108.2139 97 -0.55 43
GU.MGRO.HHE. 2021-12-30T13:14:18.70 0.6 undecidable manual S 281 104.5176 97 -0.52 44
GU.EQUI.HHZ. 2021-12-30T13:14:13.85 0.6 undecidable manual S 68 90.5427 98 -1.67 28
GU.STV.HHN. 2021-12-30T13:14:12.94 0.6 undecidable manual P 287 146.9418 54 0.32 43
IV.QLNO.HHZ. 2021-12-30T13:14:12.19 0.6 undecidable manual S 310 78.0663 99 -0.03 52
GU.ENR.HHN. 2021-12-30T13:14:11.89 0.3 undecidable manual P 287 139.4604 95 0.21 67
RD.PGF.BHE. 2021-12-30T13:14:11.17 1.0 undecidable manual P 183 146.9418 54 -1.45 14
GU.POPM.HHZ. 2021-12-30T13:14:11.69 0.3 undecidable manual P 81 134.0658 95 0.83 54
GU.GSCL.HHN. 2021-12-30T13:14:10.89 0.3 undecidable manual P 65 130.2696 95 0.62 60
IV.BDI.HNZ. 2021-12-30T13:14:09.23 0.6 undecidable manual P 79 121.6893 96 0.28 45
FR.SAOF.HHE.00 2021-12-30T13:14:09.51 1.0 undecidable manual P 276 123.8871 96 0.22 23
GU.RNCA.HHZ. 2021-12-30T13:14:08.94 0.3 undecidable manual S 350 67.5768 101 -0.53 72
GU.SARM.EHE. 2021-12-30T13:14:07.17 0.6 undecidable manual P 71 109.8123 96 0.04 49
GU.MAIM.HHE. 2021-12-30T13:14:07.31 0.6 undecidable manual P 87 111.6993 96 -0.12 49
IV.BOB.HHE. 2021-12-30T13:14:06.60 0.3 undecidable manual P 16 103.3188 97 0.46 68
IV.PLMA.HHE. 2021-12-30T13:14:06.85 0.6 undecidable manual S 72 63.7917 102 -1.63 30
GU.MGRO.HHE. 2021-12-30T13:14:06.40 0.1 undecidable manual P 281 104.5176 97 0.08 100
GU.GBOS.HHE. 2021-12-30T13:14:06.89 0.1 undecidable manual P 293 108.2139 97 0.01 99
GU.GRAM.HHE. 2021-12-30T13:14:06.42 0.3 undecidable manual P 48 103.3188 97 0.28 70
GU.IMI.HHE. 2021-12-30T13:14:05.66 0.3 undecidable manual P 273 96.126 97 0.61 67
GU.PCP.HHZ. 2021-12-30T13:14:03.72 0.3 undecidable manual P 330 86.247 98 0.19 75
GU.EQUI.HHZ. 2021-12-30T13:14:03.95 0.1 undecidable manual P 68 90.5427 98 -0.24 100
GU.GORR.HHE. 2021-12-30T13:14:03.58 0.3 undecidable manual P 11 83.1501 99 0.52 70
GU.RORO.HHZ. 2021-12-30T13:14:03.49 0.3 undecidable manual P 288 86.3469 98 -0.06 77
IV.QLNO.HHZ. 2021-12-30T13:14:02.55 0.6 undecidable manual P 310 78.0663 99 0.27 50
GU.RNCA.HHZ. 2021-12-30T13:14:01.66 0.3 undecidable manual P 350 67.5768 101 0.97 60
IV.PLMA.HHE. 2021-12-30T13:13:59.64 0.1 undecidable manual P 72 63.7917 102 -0.48 100
IV.MSSA.HHZ. 2021-12-30T13:13:58.98 0.1 undecidable manual P 34 59.7957 103 -0.54 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MSSA.HHN. ML:2.1 0.000224 0.1 AML other m 2021-12-30T13:14:09.32
IV.MSSA.HHE. ML:2.1 0.00022349999999999998 0.12 AML other m 2021-12-30T13:14:09.74
GU.RNCA.HHN. ML:1.9 0.0001275 0.56 AML other m 2021-12-30T13:14:11.24
GU.RNCA.HHE. ML:1.9 0.00014050000000000003 1.56 AML other m 2021-12-30T13:14:11.88
IV.QLNO.HHE. ML:1.3 0.000023723109999999997 1.6608 AML other m 2021-12-30T13:14:14.99
IV.QLNO.HHN. ML:1.3 0.000026773405 0.1984 AML other m 2021-12-30T13:14:14.76
GU.PCP.HHN. ML:1.4 0.000030087645 1.5584 AML other m 2021-12-30T13:14:15.21
GU.PCP.HHE. ML:1.4 0.00002933286 0.3008 AML other m 2021-12-30T13:14:21.55
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