Earthquake (explosion) with magnitude of ML 1.4 on date 03-09-2019 and time 11:41:54 (Italy) in region Costa Ligure centro occidentale (Savona)

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

  • 03-09-2019 09:41:54 (UTC)
  • 03-09-2019 11:41:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2460, 8.5100 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: explosion.

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
Bergeggi SV 5 1129 1129
Vado Ligure SV 6 8336 9465
Savona SV 7 61345 70810
Spotorno SV 7 3803 74613
Noli SV 9 2736 77349
Albissola Marina SV 9 5487 82836
Quiliano SV 10 7232 90068
Albisola Superiore SV 11 10163 100231
Celle Ligure SV 11 5237 105468
Vezzi Portio SV 12 809 106277
Varazze SV 14 13251 119528
Orco Feglino SV 15 890 120418
Finale Ligure SV 16 11711 132129
Altare SV 17 2108 134237
Stella SV 17 3009 137246
Mallare SV 18 1146 138392
Calice Ligure SV 18 1730 140122
Rialto SV 19 564 140686
Borgio Verezzi SV 19 2205 142891
Cogoleto GE 19 9172 152063

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km SE of Savona (61345 inhabitants)
38 Km W of Genova (586655 inhabitants)
75 Km NE of Sanremo (54807 inhabitants)
75 Km S of Alessandria (93943 inhabitants)
77 Km SE of Asti (76202 inhabitants)
78 Km E of Cuneo (56081 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
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 2019-09-03
09:41:54
44.2458 8.5103 0 2020-02-28
16:42:09
Bollettino Sismico Italiano INGV 74000301
Reviewed
Rev100
ML 1.4 2019-09-03
09:41:55
44.2982 8.4623 10 2019-09-03
09:51:34
Sala Sismica INGV-Roma 72077521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-03 09:41:54 ± 0.19
Latitude 44.2458 ± 0.0180
Longitude 8.5103 ± 0.0151
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type explosion
Origin ID 74000301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2190
Semi-minor axis of confidence ellipse (meter) 920
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 335
Circular confidence region, given by single value of horizontal uncertainty (meter) 2190.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.78061
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 74000301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-11-24 18:43:22

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 72077521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-03 09:51:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VBKN.HHZ. 2019-09-03T09:43:39.59 3.0 negative manual Pg 20.02 0
IV.PE3.EHZ. 2019-09-03T09:43:30.66 3.0 undecidable manual Sg 9.67 0
IV.LPEL.HHZ. 2019-09-03T09:43:26.14 3.0 undecidable manual Pg 18.299999 0
IV.ATPI.EHZ. 2019-09-03T09:43:23.33 3.0 undecidable manual Sn 2.38 0
IV.CAVE.HHZ. 2019-09-03T09:43:00.14 3.0 undecidable manual Sg 5.02 0
IV.FDMO.HHZ. 2019-09-03T09:42:57.12 3.0 undecidable manual Pn 5.28 0
IV.MSSA.HHZ. 2019-09-03T09:42:10.19 0.1 undecidable manual P 84 0.7240 50 0.51 82
GU.ENR.HHZ. 2019-09-03T09:42:10.11 0.3 undecidable manual P 269 0.7806 50 -0.54 60
FR.SAOF.HHZ. 2019-09-03T09:42:10.10 0.6 undecidable manual P 250 0.7347 50 0.25 43
GU.GORR.HHZ. 2019-09-03T09:42:08.30 0.1 undecidable manual P 57 0.6646 50 -0.37 86
IV.SARZ.HHE. 2019-09-03T09:42:08.11 0.1 undecidable manual P 25 0.6844 50 -0.89 71
IV.IMI.HHE. 2019-09-03T09:42:06.43 0.1 undecidable manual P 233 0.5558 50 -0.37 88
GU.GBOS.HHZ. 2019-09-03T09:42:04.62 0.1 undecidable manual P 270 0.4802 90 -0.52 86
GU.RNCA.HHZ. 2019-09-03T09:42:03.13 0.1 undecidable manual P 54 0.3876 90 0.05 97
GU.RORO.HHZ. 2019-09-03T09:42:02.17 0.1 undecidable manual P 247 0.3453 90 0.02 99
IT.GNV.HGE. 2019-09-03T09:42:02.79 0.3 undecidable manual P 58 0.3543 90 0.45 67
GU.PCP.HHZ. 2019-09-03T09:42:01.06 0.1 undecidable manual P 5 0.2959 90 0 100
GU.CANO.HHZ. 2019-09-03T09:41:59.50 0.1 undecidable manual P 259 0.1996 90 0.6 88
IV.QLNO.HHZ. 2019-09-03T09:41:58.31 0.1 undecidable manual P 304 0.1412 90 0.7 86
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.QLNO.HHE. ML:1.4 0.0002675 1.58 AML other m 2019-09-03T09:42:02.97
IV.QLNO.HHN. ML:1.2 0.0001985 0.8 AML other m 2019-09-03T09:42:02.79
GU.RNCA.HHE. ML:1.1 0.000040300000000000004 0.22 AML other m 2019-09-03T09:42:03.78
GU.CANO.HHE. ML:1.7 0.000375 1.08 AML other m 2019-09-03T09:42:05.09
GU.CANO.HHN. ML:1.5 0.0002585 0.84 AML other m 2019-09-03T09:42:06.28
GU.RORO.HHN. ML:1.5 0.000108 1.28 AML other m 2019-09-03T09:42:08.99
GU.PCP.HHE. ML:1.4 0.00011999999999999999 1.3 AML other m 2019-09-03T09:42:09.20
GU.PCP.HHN. ML:1.3 0.00008765 0.66 AML other m 2019-09-03T09:42:09.50
GU.RORO.HHE. ML:1.6 0.00014735 1.52 AML other m 2019-09-03T09:42:10.17
GU.RNCA.HHN. ML:1.0 0.000028899999999999998 0.42 AML other m 2019-09-03T09:42:10.91
FR.SAOF.HHN.00 ML:1.5 0.00004289999999999999 0.42 AML other m 2019-09-03T09:42:16.79
GU.GORR.HHN. ML:1.4 0.00003915 0.46 AML other m 2019-09-03T09:42:19.92
FR.SAOF.HHE.00 ML:1.6 0.0000585 1.16 AML other m 2019-09-03T09:42:21.11
GU.GORR.HHE. ML:1.5 0.000043700000000000005 1.38 AML other m 2019-09-03T09:42:22.24
GU.ENR.HHN. ML:1.6 0.00004555 0.9 AML other m 2019-09-03T09:42:22.17
GU.ENR.HHE. ML:1.5 0.000041099999999999996 1.26 AML other m 2019-09-03T09:42:26.90
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download