Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 12-10-2021 and time 17:05:08 (UTC) in region Costa Ligure centro occidentale (Savona)

A magnitude ML 1.4 earthquake occured in region: Costa Ligure centro occidentale (Savona), on

  • 12-10-2021 17:05:08 (UTC)
  • 12-10-2021 19:05:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8510, 8.2600 at 8 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.

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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
Cervo IM 14 1187 1187
San Bartolomeo al Mare IM 15 3129 4316
Andora SV 15 7552 11868
Diano Marina IM 16 5977 17845
Laigueglia SV 16 1810 19655
Diano Castello IM 18 2214 21869
Diano San Pietro IM 18 1145 23014
Villa Faraldi IM 19 444 23458
Alassio SV 19 10934 34392
Imperia IM 19 42034 76426

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Sanremo (54807 inhabitants)
54 Km SW of Savona (61345 inhabitants)
82 Km SW of Genova (586655 inhabitants)
83 Km SE of Cuneo (56081 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
Reviewed
Rev100 		ML 1.4 2021-10-12
17:05:08		 43.8508 8.2602 8 2021-10-12
17:15:17		 Sala Sismica INGV-Roma 96478981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-12 17:05:08 ± 0.16
Latitude 43.8508 ± 0.0054
Longitude 8.2602 ± 0.0075
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96478981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 707
Semi-minor axis of confidence ellipse (meter) 362
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 319
Circular confidence region, given by single value of horizontal uncertainty (meter) 710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 247
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.77791
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 96478981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-12 17:15:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PZUN.HHZ. 2021-10-12T17:07:02.88 3.0 positive manual Pg 18.5 0
IV.PP3.EHZ. 2021-10-12T17:07:01.14 3.0 undecidable manual Sn 5.2 0
IV.MMO1.EHZ. 2021-10-12T17:06:59.42 3.0 undecidable manual Sn 5.81 0
OT.OT17.EHZ. 2021-10-12T17:06:52.88 3.0 positive manual Pg 19.389999 0
IV.ERC.EHZ. 2021-10-12T17:06:45.84 3.0 undecidable manual Pn -1.37 0
IV.BSSO.HHZ. 2021-10-12T17:06:40.68 3.0 positive manual Pg 13.48 0
IV.NARO.HHZ. 2021-10-12T17:06:37.06 3.0 undecidable manual Sn 0.04 0
IV.OFFI.HHZ. 2021-10-12T17:06:24.24 3.0 positive manual Pg 12.86 0
IV.CADC.EHZ. 2021-10-12T17:06:19.20 3.0 undecidable manual Sg 9.04 0
IV.FRON.EHZ. 2021-10-12T17:06:14.49 3.0 undecidable manual Pg 14.18 0
IV.CTI.HHZ. 2021-10-12T17:06:10.89 3.0 undecidable manual Pg 11.08 0
IV.MRGE.HHZ. 2021-10-12T17:06:09.54 3.0 undecidable manual Sn 0.27 0
IV.MRGE.HHZ. 2021-10-12T17:05:42.17 3.0 undecidable manual Pn -0.95 0
GU.STV.HHZ. 2021-10-12T17:05:34.71 0.3 undecidable manual S 301 86.3469 50 -0.32 63
GU.PCP.HHZ. 2021-10-12T17:05:33.13 0.3 undecidable manual S 16 79.8645 50 -0.18 66
FR.SAOF.HHZ.00 2021-10-12T17:05:27.23 0.3 undecidable manual S 285 58.497 50 -0.36 66
GU.GBOS.HHZ. 2021-10-12T17:05:26.89 0.1 undecidable manual S 322 54.8007 50 0.28 90
GU.STV.HHZ. 2021-10-12T17:05:24.15 0.1 undecidable manual P 301 86.3469 50 0.18 87
GU.MGRO.HHZ. 2021-10-12T17:05:23.30 0.1 undecidable manual S 301 41.9247 50 0.13 96
GU.PCP.HHZ. 2021-10-12T17:05:22.92 0.3 undecidable manual P 16 79.8645 50 -0.05 68
GU.CANO.HHZ. 2021-10-12T17:05:22.46 0.1 undecidable manual S 357 39.627 50 -0.1 97
GU.RORO.HHZ. 2021-10-12T17:05:20.63 0.1 undecidable manual S 332 32.8449 104 0.04 99
GU.BURY.HHZ. 2021-10-12T17:05:19.46 0.1 undecidable manual P 263 56.7987 50 0.05 95
FR.SAOF.HHZ.00 2021-10-12T17:05:19.94 0.1 undecidable manual P 285 58.497 50 0.27 90
GU.IMI.HHZ. 2021-10-12T17:05:19.66 0.1 undecidable manual S 283 30.0477 105 0.01 100
GU.GBOS.HHZ. 2021-10-12T17:05:19.15 0.1 undecidable manual P 322 54.8007 50 0.05 95
GU.MGRO.HHZ. 2021-10-12T17:05:17.01 0.1 negative manual P 301 41.9247 50 -0.1 96
GU.CANO.HHZ. 2021-10-12T17:05:16.86 0.6 undecidable manual P 357 39.627 50 0.1 48
GU.RORO.HHZ. 2021-10-12T17:05:15.64 0.1 undecidable manual P 332 32.8449 104 0.01 99
GU.IMI.HHZ. 2021-10-12T17:05:14.86 0.1 undecidable manual P 283 30.0477 105 -0.22 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.IMI.HHE. ML:1.1 0.00005935 1.04 AML other m 2021-10-12T17:05:20.55
GU.IMI.HHN. ML:1.3 0.00009659999999999999 0.9 AML other m 2021-10-12T17:05:20.72
GU.MGRO.HHN. ML:1.3 0.0000704 0.76 AML other m 2021-10-12T17:05:23.82
GU.CANO.HHE. ML:1.7 0.0001975 0.72 AML other m 2021-10-12T17:05:24.49
GU.MGRO.HHE. ML:1.4 0.00007364999999999999 0.24 AML other m 2021-10-12T17:05:24.51
GU.CANO.HHN. ML:1.6 0.0001385 1.8 AML other m 2021-10-12T17:05:24.00
FR.SAOF.HHE.00 ML:1.3 0.00004255 0.5 AML other m 2021-10-12T17:05:28.35
GU.GBOS.HHN. ML:1.0 0.000024 1.24 AML other m 2021-10-12T17:05:28.14
GU.GBOS.HHE. ML:1.0 0.00002425 0.5 AML other m 2021-10-12T17:05:28.54
FR.SAOF.HHN.00 ML:1.2 0.00003525 1.18 AML other m 2021-10-12T17:05:29.18
GU.PCP.HHE. ML:1.6 0.00006145 0.78 AML other m 2021-10-12T17:05:34.97
GU.PCP.HHN. ML:1.5 0.000040050000000000004 0.76 AML other m 2021-10-12T17:05:35.56
GU.STV.HHE. ML:1.4 0.000030400000000000004 0.38 AML other m 2021-10-12T17:05:36.15
GU.STV.HHN. ML:1.4 0.000034149999999999997 1.16 AML other m 2021-10-12T17:05:37.11
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