Earthquake (controlled explosion) with magnitude of ML 1.8 on date 07-02-2020 and time 10:18:33 (Italy) in region Costa Ligure centro orientale (Genova)

A magnitude ML 1.8 (controlled explosion) earthquake occured in region: Costa Ligure centro orientale (Genova), on

  • 07-02-2020 09:18:33 (UTC)
  • 07-02-2020 10:18:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.34, 8.69 at 3 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Event type: controlled 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
Cogoleto GE 6 9172 9172
Arenzano GE 7 11519 20691
Varazze SV 9 13251 33942
Celle Ligure SV 12 5237 39179
Mele GE 12 2725 41904
Albisola Superiore SV 14 10163 52067
Albissola Marina SV 15 5487 57554
Stella SV 17 3009 60563
Savona SV 17 61345 121908
Urbe SV 18 700 122608
Masone GE 18 3679 126287

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Savona (61345 inhabitants)
21 Km W of Genova (586655 inhabitants)
64 Km S of Alessandria (93943 inhabitants)
73 Km SE of Asti (76202 inhabitants)
91 Km E of Cuneo (56081 inhabitants)
93 Km NE of Sanremo (54807 inhabitants)
94 Km W of La Spezia (93959 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 1.8 2020-02-07
09:18:33
44.34 8.69 3 2020-02-07
09:40:56
Sala Sismica INGV-Roma 76313931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-07 09:18:33 ± 0.29
Latitude 44.34 ± 0.01
Longitude 8.69 ± 0.02
Depth (km) 3 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type controlled explosion
Origin ID 76313931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1455
Semi-minor axis of confidence ellipse (meter) 952
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 322
Circular confidence region, given by single value of horizontal uncertainty (meter) 1460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.29412
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 76313931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-07 09:40:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-02-07T09:20:31.00 3.0 undecidable manual Sg 8.47 0
IV.FAGN.HHZ. 2020-02-07T09:20:31.90 3.0 undecidable manual Sn -0.71 0
IV.FAGN.HHZ. 2020-02-07T09:19:49.29 3.0 negative manual Pg 7.99 0
IV.CSNT.HHZ. 2020-02-07T09:19:42.14 3.0 undecidable manual Sg -0.13 0
IV.MNTV.HNZ. 2020-02-07T09:19:09.26 3.0 undecidable manual Pg 1.84 0
GU.STV.HHZ. 2020-02-07T09:19:07.13 0.6 undecidable manual S 265 0.9821 50 0.1 42
GU.LSD.HHZ. 2020-02-07T09:19:02.62 3.0 negative manual P -0.13 0
GU.RRL.HHZ. 2020-02-07T09:19:01.54 3.0 positive manual P 0.36 0
GU.TRAV.HHZ. 2020-02-07T09:18:59.99 3.0 positive manual P 0 0
IV.IMI.HHZ. 2020-02-07T09:18:59.33 1.0 undecidable manual S 233 0.7168 50 0.14 22
GU.RSP.HHZ. 2020-02-07T09:18:58.42 0.1 positive manual P 309 1.2941 50 0.12 78
GU.BHB.HHZ. 2020-02-07T09:18:55.61 0.3 negative manual P 296 1.1295 50 0.11 61
GU.PZZ.HHZ. 2020-02-07T09:18:55.96 0.1 negative manual P 279 1.1367 50 0.34 77
GU.GRAM.HHZ. 2020-02-07T09:18:54.24 1.0 undecidable manual P 81 0.992 50 1.09 15
GU.STV.HHZ. 2020-02-07T09:18:53.62 0.1 undecidable manual P 265 0.9821 50 0.65 73
IV.MONC.HHZ. 2020-02-07T09:18:52.68 0.6 undecidable manual P 324 0.911 50 0.93 33
FR.SAOF.HHZ.00 2020-02-07T09:18:52.29 0.6 undecidable manual P 247 0.8903 50 0.88 34
GU.RORO.HHZ. 2020-02-07T09:18:51.24 0.6 undecidable manual S 243 0.5036 50 -1.62 25
GU.ENR.HHZ. 2020-02-07T09:18:51.81 0.3 undecidable manual P 263 0.9173 50 -0.05 65
GU.GORR.HHZ. 2020-02-07T09:18:51.11 0.6 undecidable manual S 58 0.5036 50 -1.75 23
IV.PLMA.HHZ. 2020-02-07T09:18:51.77 0.6 undecidable manual P 109 0.8822 50 0.5 40
IV.IMI.HHZ. 2020-02-07T09:18:48.42 0.3 undecidable manual P 233 0.7168 50 -0.02 68
GU.CANO.HHZ. 2020-02-07T09:18:47.20 0.6 undecidable manual S 248 0.3516 95 -0.17 48
GU.GBOS.HHZ. 2020-02-07T09:18:46.51 0.6 undecidable manual P 261 0.6178 50 -0.23 44
GU.ROTM.HHZ. 2020-02-07T09:18:46.05 3.0 negative manual P -0.18 0
GU.GORR.HHZ. 2020-02-07T09:18:44.70 0.3 positive manual P 58 0.5036 50 -0.09 70
GU.RORO.HHZ. 2020-02-07T09:18:44.16 0.1 negative manual P 243 0.5036 50 -0.63 82
GU.PCP.HHZ. 2020-02-07T09:18:41.01 1.0 undecidable manual S 332 0.2248 98 -1.48 14
GU.CANO.HHZ. 2020-02-07T09:18:41.41 0.1 positive manual P 248 0.3516 95 -0.2 94
IV.QLNO.HHZ. 2020-02-07T09:18:39.41 0.1 positive manual P 266 0.2482 97 0.1 98
GU.PCP.HHZ. 2020-02-07T09:18:38.76 0.1 undecidable manual P 332 0.2248 98 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PCP.HHN. ML:1.5 0.0002185 0.9 AML other m 2020-02-07T09:18:42.03
IV.QLNO.HHN. ML:1.3 0.00012385 1.24 AML other m 2020-02-07T09:18:45.03
IV.QLNO.HHE. ML:1.3 0.0001215 1.12 AML other m 2020-02-07T09:18:45.03
GU.PCP.HHE. ML:1.7 0.000309 1.12 AML other m 2020-02-07T09:18:49.23
GU.CANO.HHN. ML:1.7 0.000195 0.26 AML other m 2020-02-07T09:18:52.16
GU.ENR.HHE. ML:1.9 7.975E-5 0.64 AML other m 2020-02-07T09:18:53.28
GU.STV.HHE. ML:1.8 4.905E-5 1.24 AML other m 2020-02-07T09:18:55.00
GU.CANO.HHE. ML:1.9 0.000306 0.98 AML other m 2020-02-07T09:18:56.83
GU.BHB.HHE. ML:1.9 5.705E-5 0.98 AML other m 2020-02-07T09:18:57.30
GU.PZZ.HHE. ML:2.3 0.000133 1.76 AML other m 2020-02-07T09:18:58.05
IV.MONC.HHN. ML:2 0.0001011 0.58 AML other m 2020-02-07T09:18:58.21
GU.PZZ.HHN. ML:2.1 8.905E-5 1.44 AML other m 2020-02-07T09:18:58.81
GU.GBOS.HHN. ML:1.4 4.04E-5 0.92 AML other m 2020-02-07T09:19:00.52
GU.RSP.HHE. ML:1.7 2.52E-5 0.42 AML other m 2020-02-07T09:19:00.56
IV.IMI.HHE. ML:1.5 4.435E-5 0.56 AML other m 2020-02-07T09:19:01.55
GU.GBOS.HHE. ML:1.4 4.2E-5 0.74 AML other m 2020-02-07T09:19:02.52
IV.IMI.HHN. ML:1.7 7.265E-5 0.84 AML other m 2020-02-07T09:19:07.60
GU.STV.HHN. ML:1.5 2.86E-5 1.2 AML other m 2020-02-07T09:19:08.68
FR.SAOF.HHN.00 ML:1.7 4.9E-5 0.86 AML other m 2020-02-07T09:19:09.85
GU.RSP.HHN. ML:1.7 2.58E-5 1.42 AML other m 2020-02-07T09:19:10.13
FR.SAOF.HHE.00 ML:1.8 5.935E-5 0.7 AML other m 2020-02-07T09:19:12.15
GU.ENR.HHN. ML:2 9.09E-5 0.72 AML other m 2020-02-07T09:19:13.32
GU.BHB.HHN. ML:1.8 3.77E-5 0.84 AML other m 2020-02-07T09:19:17.11
IV.MONC.HHE. ML:2 0.00011 1.24 AML other m 2020-02-07T09:19:22.87
IV.FAGN.HHE. ML:3.4 9.445E-5 0.5 AML other m 2020-02-07T09:20:51.45
IV.FAGN.HHN. ML:3.3 7.615E-5 0.96 AML other m 2020-02-07T09:20:51.64
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