Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 21-02-2018 and time 00:01:54 (Italy) in region Costa Ligure centro occidentale (Savona)

A magnitude ML 2.4 earthquake occured in region: Costa Ligure centro occidentale (Savona), on

  • 20-02-2018 23:01:54 (UTC)
  • 21-02-2018 00:01:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0010, 8.5780 at 7 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km S of Savona (61345 inhabitants)
54 Km SW of Genova (586655 inhabitants)
67 Km E of Sanremo (54807 inhabitants)
93 Km E 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
Bulletin
Rev1000 		ML 2.4 2018-02-20
23:01:54		 44.0013 8.5783 7 2019-04-24
14:49:30		 Bollettino Sismico Italiano INGV 56435211
Reviewed
Rev100 		ML 2.4 2018-02-20
23:01:55		 44.0212 8.5765 10 2018-02-20
23:16:17		 Sala Sismica INGV-Roma 54054561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-02-20 23:01:54 ± 0.3
Latitude 44.0013 ± 0.0135
Longitude 8.5783 ± 0.0088
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 56435211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1117
Semi-minor axis of confidence ellipse (meter) 1003
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 357
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 161
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.32016
Epicentral distance of station farthest from the epicenter (degree) 1.94254
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 56435211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-02-18 16:40:05

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 54054561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-02-20 23:16:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PZZ.HHZ. 2018-02-20T23:02:32.85 0.6 undecidable manual S 296 128.9709 50 0.62 38
GU.EQUI.HHZ. 2018-02-20T23:02:31.66 0.3 undecidable manual S 81 126.7731 50 0.02 66
IV.MDI.HHZ. 2018-02-20T23:02:28.38 0.6 undecidable manual P 24 215.6175 38 -0.11 29
GU.STV.HHZ. 2018-02-20T23:02:25.94 0.3 undecidable manual S 286 103.3188 50 0.56 61
MN.BNI.HHN. 2018-02-20T23:02:23.93 0.3 undecidable manual P 308 190.1652 38 -1.4 31
GU.RRL.HHZ. 2018-02-20T23:02:22.06 0.3 undecidable manual P 306 174.492 50 -1.15 38
GU.POPM.HHZ. 2018-02-20T23:02:22.18 0.6 undecidable manual P 88 173.7927 50 -0.94 28
GU.GORR.HHZ. 2018-02-20T23:02:21.72 0.6 undecidable manual S 40 87.9453 50 0.46 43
GU.GSCL.HHN. 2018-02-20T23:02:21.35 0.6 undecidable manual P 76 164.5131 50 -0.34 37
IV.BDI.HNZ. 2018-02-20T23:02:21.01 1.0 undecidable manual P 87 161.0166 50 -0.14 19
GU.RSP.HHZ. 2018-02-20T23:02:21.03 0.3 undecidable manual P 321 164.2134 50 -0.6 51
GU.BURY.HHZ. 2018-02-20T23:02:21.01 0.3 undecidable manual S 254 85.1481 50 0.47 65
GU.SARM.EHZ. 2018-02-20T23:02:19.26 0.6 undecidable manual P 81 146.5422 50 0.33 39
GU.MAIM.HHZ. 2018-02-20T23:02:18.33 0.6 undecidable manual P 93 153.0357 50 -1.6 22
GU.GRAM.HHZ. 2018-02-20T23:02:17.23 0.6 undecidable manual P 65 130.0698 50 0.85 34
MN.VLC.HHZ. 2018-02-20T23:02:17.71 0.6 undecidable manual P 82 145.1436 50 -0.99 31
GU.PZZ.HHZ. 2018-02-20T23:02:16.05 0.3 undecidable manual P 296 128.9709 50 -0.17 64
GU.BHB.HHZ. 2018-02-20T23:02:16.86 1.0 undecidable manual P 312 139.3605 50 -0.94 16
GU.EQUI.HHZ. 2018-02-20T23:02:15.54 0.3 undecidable manual P 81 126.7731 50 -0.33 62
GU.GBOS.HHZ. 2018-02-20T23:02:14.54 0.3 undecidable manual S 295 64.5909 50 -0.49 67
IV.BOB.HNE. 2018-02-20T23:02:14.39 0.3 undecidable manual P 39 109.5126 50 1.19 46
GU.PCP.HHZ. 2018-02-20T23:02:13.44 0.3 undecidable manual S 357 59.9955 50 -0.36 70
GU.STV.HHZ. 2018-02-20T23:02:13.06 0.3 undecidable manual P 286 103.3188 50 0.8 55
GU.ROTM.HHZ. 2018-02-20T23:02:12.24 0.3 undecidable manual P 349 95.7264 50 1.15 48
GU.BURY.HHZ. 2018-02-20T23:02:09.72 0.3 undecidable manual P 254 85.1481 50 0.26 68
GU.GORR.HHZ. 2018-02-20T23:02:09.88 0.3 undecidable manual P 40 87.9453 50 0 72
GU.RORO.HHZ. 2018-02-20T23:02:08.55 0.3 undecidable manual S 287 42.624 50 -0.63 67
GU.RNCA.HHZ. 2018-02-20T23:02:06.08 0.3 undecidable manual P 29 59.9955 50 0.51 68
GU.CANO.HHZ. 2018-02-20T23:02:06.54 0.3 undecidable manual S 310 35.5422 100 -0.33 74
GU.GBOS.HHZ. 2018-02-20T23:02:06.52 0.1 negative manual P 295 64.5909 50 0.24 95
GU.PCP.HHZ. 2018-02-20T23:02:05.62 0.3 undecidable manual P 357 59.9955 50 0.04 75
GU.RORO.HHZ. 2018-02-20T23:02:02.84 0.3 undecidable manual P 287 42.624 50 -0.06 77
GU.CANO.HHZ. 2018-02-20T23:02:01.82 0.1 undecidable manual P 310 35.5422 100 0.25 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHN. ML:2.5 0.00134 0.58 AML other m 2018-02-20T23:02:07.30
GU.CANO.HHE. ML:2.4 0.001096518 0.2176 AML other m 2018-02-20T23:02:07.12
GU.RORO.HHE. ML:2.6 0.0014053745 0.1152 AML other m 2018-02-20T23:02:10.27
GU.RORO.HHN. ML:2.5 0.00106564175 0.0896 AML other m 2018-02-20T23:02:10.41
GU.PCP.HHN. ML:2.3 0.0004077433 0.2176 AML other m 2018-02-20T23:02:15.37
GU.PCP.HHE. ML:2.4 0.00051252425 0.1408 AML other m 2018-02-20T23:02:15.83
GU.GBOS.HHE. ML:2.1 0.0002391506 0.2176 AML other m 2018-02-20T23:02:16.00
GU.GBOS.HHN. ML:2.2 0.00032578065 0.3584 AML other m 2018-02-20T23:02:16.17
GU.BURY.HHE. ML:2.3 0.00023712225000000001 0.32 AML other m 2018-02-20T23:02:21.91
GU.BURY.HHN. ML:2.3 0.00025986324999999997 0.2048 AML other m 2018-02-20T23:02:23.30
GU.ROTM.HHN. ML:3.0 0.0009705 0.34 AML other m 2018-02-20T23:02:27.34
GU.STV.HHN. ML:2.5 0.00027249224999999997 0.2304 AML other m 2018-02-20T23:02:27.78
GU.STV.HHE. ML:2.4 0.00021562249999999998 0.256 AML other m 2018-02-20T23:02:29.33
GU.PZZ.HHN. ML:2.8 0.000462 0.28 AML other m 2018-02-20T23:02:35.28
GU.GRAM.HHN. ML:2.7 0.00031448575 0.32 AML other m 2018-02-20T23:02:35.53
GU.BHB.HHE. ML:2.3 0.00010518804499999999 0.2304 AML other m 2018-02-20T23:02:35.91
GU.GRAM.HHE. ML:2.7 0.00034180140000000006 0.256 AML other m 2018-02-20T23:02:36.12
GU.ROTM.HHE. ML:2.8 0.0007885 0.46 AML other m 2018-02-20T23:02:37.28
GU.BHB.HHN. ML:2.3 0.00011878073 0.3072 AML other m 2018-02-20T23:02:36.99
GU.PZZ.HHE. ML:2.8 0.000372 0.46 AML other m 2018-02-20T23:02:37.21
MN.VLC.HHN. ML:2.0 0.000058807084999999994 0.2304 AML other m 2018-02-20T23:02:37.76
GU.SARM.EHE. ML:2.6 0.00022772045 0.6656 AML other m 2018-02-20T23:02:39.08
MN.VLC.HHE. ML:2.2 0.00008840561499999999 0.4608 AML other m 2018-02-20T23:02:39.64
MN.VLC.HNE. ML:2.3 0.0001121413 0.4992 AML other m 2018-02-20T23:02:39.67
GU.SARM.EHN. ML:2.7 0.00027749025 0.4736 AML other m 2018-02-20T23:02:41.91
GU.RSP.HHE. ML:2.1 0.000051405684999999994 0.3712 AML other m 2018-02-20T23:02:47.36
GU.RSP.HNE. ML:2.1 0.000061708525 0.3968 AML other m 2018-02-20T23:02:47.36
GU.RRL.HHN. ML:2.3 0.00007441321000000001 0.4992 AML other m 2018-02-20T23:02:53.45
GU.RRL.HHE. ML:2.1 0.0000520491475 0.32 AML other m 2018-02-20T23:02:53.79
IV.MDI.HHN. ML:2.6 0.000101208625 0.6784 AML other m 2018-02-20T23:02:53.80
IV.MDI.HHE. ML:2.7 0.000122310055 0.8064 AML other m 2018-02-20T23:02:54.23
IV.MDI.HNE. ML:2.7 0.00013877335 0.704 AML other m 2018-02-20T23:02:54.38
IV.ZONE.HHN. ML:2.0 0.00002319485 0.2688 AML other m 2018-02-20T23:03:06.83
IV.ZONE.HHE. ML:2.0 0.000024660966 0.2688 AML other m 2018-02-20T23:03:08.34
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
Waveforms Seismic signals in miniseed + resp format Download