ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.6 on date 15-03-2019 and time 11:00:26 (Italy) in region Costa Ligure centro occidentale (Savona)

A magnitude ML 1.6 earthquake occured in region: Costa Ligure centro occidentale (Savona), on

  • 15-03-2019 10:00:26 (UTC)
  • 15-03-2019 11:00:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.03, 8.55 at 6 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.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km S of Savona (61345 inhabitants)
52 Km SW of Genova (586655 inhabitants)
66 Km E of Sanremo (54807 inhabitants)
89 Km E of Cuneo (56081 inhabitants)
98 Km S of Alessandria (93943 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.6 2019-03-15
10:00:26
44.03 8.55 6 2019-03-15
10:16:58
Sala Sismica INGV-Roma 66551281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-15 10:00:26 ± 0.27
Latitude 44.03 ± 0.01
Longitude 8.55 ± 0.01
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 66551281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1167
Semi-minor axis of confidence ellipse (meter) 680
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 330
Circular confidence region, given by single value of horizontal uncertainty (meter) 1170
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 189
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.83457
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 66551281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-15 10:16:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARRO.EHZ. 2019-03-15T10:02:09.68 3.0 undecidable manual Sg 12.75 0
IV.MTGR.HHZ. 2019-03-15T10:02:07.10 3.0 undecidable manual Pn 3.18 0
IV.NRCA.HNZ. 2019-03-15T10:02:06.33 3.0 undecidable manual Sn 6.03 0
IV.IFOR.HHZ. 2019-03-15T10:01:46.81 3.0 positive manual Pn 7.17 0
IV.ZONE.HHZ. 2019-03-15T10:01:29.45 3.0 undecidable manual Sg 1.5 0
IV.MMUR.HNZ. 2019-03-15T10:01:25.66 3.0 positive manual Pg 11.28 0
IV.MSSA.HHE. 2019-03-15T10:00:52.38 0.6 undecidable manual S 67 0.7473 50 0.55 55
GU.BHB.HHZ. 2019-03-15T10:00:49.64 3.0 undecidable manual P 0
IV.EUCT.HNZ. 2019-03-15T10:00:48.04 3.0 negative manual P -0.72 0
IV.IMI.HHZ. 2019-03-15T10:00:44.43 0.3 undecidable manual S 256 0.4892 50 0.25 94
GU.PCP.HHZ. 2019-03-15T10:00:44.30 0.6 undecidable manual S 359 0.509 50 -0.45 60
GU.ENR.HHZ. 2019-03-15T10:00:42.83 0.3 undecidable manual P 284 0.8346 50 0.42 84
GU.GORR.HHE. 2019-03-15T10:00:42.07 0.6 undecidable manual P 42 0.7815 50 0.58 54
IV.MSSA.HHE. 2019-03-15T10:00:40.52 0.3 undecidable manual P 67 0.7473 50 -0.4 86
GU.RORO.HHZ. 2019-03-15T10:00:39.47 0.6 undecidable manual S 283 0.3579 98 -0.47 61
IV.QLNO.HHZ. 2019-03-15T10:00:38.69 0.6 undecidable manual S 333 0.3274 99 -0.06 67
GU.GBOS.HHZ. 2019-03-15T10:00:37.48 0.3 undecidable manual P 293 0.5522 50 -0.09 96
GU.CANO.HHZ. 2019-03-15T10:00:37.50 0.3 undecidable manual S 308 0.286 100 0.31 96
IV.IMI.HHZ. 2019-03-15T10:00:36.13 0.3 undecidable manual P 256 0.4892 50 -0.37 91
GU.RNCA.HHE. 2019-03-15T10:00:36.89 0.3 undecidable manual P 33 0.5234 50 -0.19 94
GU.PCP.HHZ. 2019-03-15T10:00:36.63 0.6 undecidable manual P 359 0.509 50 -0.2 63
IV.QLNO.HHZ. 2019-03-15T10:00:33.46 0.3 undecidable manual P 333 0.3274 99 0.09 100
GU.RORO.HHZ. 2019-03-15T10:00:33.91 0.3 undecidable manual P 283 0.3579 98 -0.14 98
GU.CANO.HHZ. 2019-03-15T10:00:32.78 0.6 positive manual P 308 0.286 100 0.32 64
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHE. ML:1.4 0.00012295615 0.2176 AML other m 2019-03-15T10:00:38.92
GU.CANO.HHN. ML:1.5 0.00013932695 0.1792 AML other m 2019-03-15T10:00:38.50
IV.QLNO.HHE. ML:1.2 6.6472095E-5 0.1408 AML other m 2019-03-15T10:00:40.82
IV.QLNO.HHN. ML:1.3 8.550436E-5 0.1408 AML other m 2019-03-15T10:00:38.85
GU.RORO.HHE. ML:1.7 0.0001861388 0.1408 AML other m 2019-03-15T10:00:41.14
GU.RORO.HHN. ML:1.6 0.00015764125 0.16 AML other m 2019-03-15T10:00:41.22
IV.IMI.HHE. ML:1.8 0.00016419475 0.256 AML other m 2019-03-15T10:00:45.59
IV.IMI.HHN. ML:2 0.0002232211 0.2368 AML other m 2019-03-15T10:00:45.18
GU.PCP.HHE. ML:1.6 8.4258475E-5 2.5984 AML other m 2019-03-15T10:00:45.60
GU.PCP.HHN. ML:1.6 9.5733935E-5 4.0768 AML other m 2019-03-15T10:00:46.36
GU.GBOS.HHE. ML:1.2 3.360768E-5 0.1792 AML other m 2019-03-15T10:00:46.83
GU.ENR.HHE. ML:1.6 4.7532045E-5 0.1024 AML other m 2019-03-15T10:00:55.55
GU.ENR.HHN. ML:1.8 7.7888525E-5 0.1216 AML other m 2019-03-15T10:00:55.91
IV.EUCT.HNE. ML:3.4 0.0013789655 0.1984 AML other m 2019-03-15T10:01:15.32
IV.EUCT.HNN. ML:3.2 0.000878033 0.0832 AML other m 2019-03-15T10:01:15.44
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download