Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 16-05-2018 and time 12:50:51 (Italy) in region Costa Ligure centro occidentale (Savona)

A magnitude ML 2.2 earthquake occured in region: Costa Ligure centro occidentale (Savona), on

  • 16-05-2018 10:50:51 (UTC)
  • 16-05-2018 12:50:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8570, 8.2770 at 8 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
Cervo IM 15 1187 1187
Andora SV 16 7552 8739
San Bartolomeo al Mare IM 16 3129 11868
Laigueglia SV 16 1810 13678
Diano Marina IM 17 5977 19655
Diano Castello IM 18 2214 21869
Diano San Pietro IM 19 1145 23014
Alassio SV 19 10934 33948
Villa Faraldi IM 19 444 34392

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Sanremo (54807 inhabitants)
53 Km SW of Savona (61345 inhabitants)
81 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
Bulletin
Rev1000 		ML 2.2 2018-05-16
10:50:51		 43.8568 8.2767 8 2019-04-24
14:50:42		 Bollettino Sismico Italiano INGV 57339881
Reviewed
Rev100 		ML 2.2 2018-05-16
10:50:51		 43.8427 8.2787 11 2018-05-16
11:01:50		 Sala Sismica INGV-Roma 56918111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-16 10:50:51 ± 0.27
Latitude 43.8568 ± 0.0108
Longitude 8.2767 ± 0.0125
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 57339881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1330
Semi-minor axis of confidence ellipse (meter) 475
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 328
Circular confidence region, given by single value of horizontal uncertainty (meter) 1330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 224
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.28149
Epicentral distance of station farthest from the epicenter (degree) 1.65115
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 56918111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-16 11:01:50

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 23
Type of magnitude ML
Reference to an origin 57339881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-05-29 11:44:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PZZ.HHZ. 2018-05-16T10:51:26.41 0.6 undecidable manual S 308 117.1938 50 0.48 40
MN.BNI.HHN. 2018-05-16T10:51:22.08 0.6 undecidable manual P 317 183.2832 38 0.65 30
GU.RRL.HHZ. 2018-05-16T10:51:19.46 0.6 undecidable manual P 316 166.7109 50 0.44 34
GU.RSP.HHZ. 2018-05-16T10:51:19.12 0.6 undecidable manual P 331 164.1135 50 0.51 34
GU.STV.HHZ. 2018-05-16T10:51:17.44 0.6 undecidable manual S 300 87.246 50 -0.5 40
GU.PCP.HHZ. 2018-05-16T10:51:15.28 0.6 undecidable manual S 16 78.8655 50 -0.44 42
GU.ENR.HHZ. 2018-05-16T10:51:15.57 0.6 undecidable manual S 301 79.6647 50 -0.36 42
GU.BHB.HHZ. 2018-05-16T10:51:14.63 0.6 undecidable manual P 324 135.0648 50 0.49 38
GU.PZZ.HHZ. 2018-05-16T10:51:12.18 0.1 positive manual P 308 117.1938 50 0.8 70
GU.GBOS.HHZ. 2018-05-16T10:51:09.85 0.6 undecidable manual S 321 55.1004 50 0.48 45
GU.BURY.HHZ. 2018-05-16T10:51:09.70 0.6 undecidable manual S 262 58.1973 50 -0.5 42
IV.QLNO.HHZ. 2018-05-16T10:51:08.09 0.6 undecidable manual S 6 52.1034 50 -0.49 44
GU.RNCA.HHZ. 2018-05-16T10:51:06.23 0.6 undecidable manual P 38 86.7465 50 -0.46 41
GU.STV.HHZ. 2018-05-16T10:51:06.93 0.3 undecidable manual P 300 87.246 50 0.17 67
GU.PCP.HHZ. 2018-05-16T10:51:05.36 0.6 undecidable manual P 16 78.8655 50 -0.12 45
GU.ENR.HHZ. 2018-05-16T10:51:05.70 0.3 undecidable manual P 301 79.6647 50 0.1 69
GU.CANO.HHZ. 2018-05-16T10:51:04.66 0.6 undecidable manual S 355 39.0276 50 -0.42 45
GU.RORO.HHZ. 2018-05-16T10:51:03.21 0.6 undecidable manual S 329 32.9448 103 -0.04 50
IV.IMI.HHZ. 2018-05-16T10:51:02.15 0.6 undecidable manual S 281 31.2465 104 -0.53 45
GU.BURY.HHZ. 2018-05-16T10:51:01.68 0.6 undecidable manual P 262 58.1973 50 -0.62 41
GU.GBOS.HHZ. 2018-05-16T10:51:01.93 0.3 undecidable manual P 321 55.1004 50 0.12 72
IV.QLNO.HHZ. 2018-05-16T10:51:01.41 0.3 undecidable manual P 6 52.1034 50 0.05 73
GU.CANO.HHZ. 2018-05-16T10:50:59.36 0.1 positive manual P 355 39.0276 50 0.02 100
GU.MGRO.HNN. 2018-05-16T10:50:59.89 0.6 undecidable manual P 299 42.7239 50 -0.02 49
GU.RORO.HHZ. 2018-05-16T10:50:58.32 0.3 undecidable manual P 329 32.9448 103 0.04 76
IV.IMI.HHZ. 2018-05-16T10:50:57.83 0.3 undecidable manual P 281 31.2465 104 -0.12 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.IMI.HHN. ML:0.0 0.0007477475500000001 0.16 AML other m 2018-05-16T10:51:03.13
GU.RORO.HHE. ML:0.0 0.0009728888 0.1024 AML other m 2018-05-16T10:51:05.07
GU.RORO.HHN. ML:2.0 0.0004818165 0.7168 AML other m 2018-05-16T10:51:03.80
GU.CANO.HHE. ML:0.0 0.0009684104 0.1792 AML other m 2018-05-16T10:51:05.76
GU.CANO.HHN. ML:0.0 0.00067416735 0.16 AML other m 2018-05-16T10:51:06.09
IV.QLNO.HHN. ML:0.0 0.00026617184999999996 0.1216 AML other m 2018-05-16T10:51:09.89
IV.QLNO.HHE. ML:0.0 0.00044767375 0.1792 AML other m 2018-05-16T10:51:09.90
GU.GBOS.HHE. ML:2.0 0.00020850000000000003 1.7 AML other m 2018-05-16T10:51:10.96
GU.GBOS.HHN. ML:2.0 0.0002545 1.72 AML other m 2018-05-16T10:51:10.10
GU.BURY.HHE. ML:0.0 0.00030469780000000004 0.1408 AML other m 2018-05-16T10:51:11.09
GU.BURY.HHN. ML:0.0 0.0002905778 0.1408 AML other m 2018-05-16T10:51:11.89
GU.PCP.HHE. ML:0.0 0.000179755495 0.096 AML other m 2018-05-16T10:51:17.07
GU.PCP.HHN. ML:0.0 0.0001715643 0.1408 AML other m 2018-05-16T10:51:16.49
GU.ENR.HHE. ML:2.5 0.0004125 0.46 AML other m 2018-05-16T10:51:17.03
GU.ENR.HHN. ML:2.5 0.00047599999999999997 0.98 AML other m 2018-05-16T10:51:17.75
GU.STV.HHE. ML:0.0 0.0002224007 0.16 AML other m 2018-05-16T10:51:20.07
GU.STV.HHN. ML:0.0 0.00021047870000000002 0.3392 AML other m 2018-05-16T10:51:20.55
GU.PZZ.HHE. ML:0.0 0.00015811354999999998 1.68 AML other m 2018-05-16T10:51:27.95
GU.PZZ.HHN. ML:0.0 0.000184563 0.1984 AML other m 2018-05-16T10:51:28.28
GU.BHB.HHE. ML:2.1 0.0000686 0.72 AML other m 2018-05-16T10:51:32.76
GU.BHB.HHN. ML:2.1 0.0000707 1.18 AML other m 2018-05-16T10:51:34.08
GU.RSP.HHN. ML:1.8 0.00003245 1.6 AML other m 2018-05-16T10:51:41.82
IV.IMI.HHE. ML:2.0 0.00049388345 0.2752 AML other m 2018-05-16T10:51:03.24
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