Earthquake (quarry blast) with magnitude of ML 0.4 on date 21-02-2020 and time 15:41:42 (UTC) in region 1 km SE Zuccarello (SV)

A magnitude ML 0.4 (quarry blast) earthquake occured in region: 1 km SE Zuccarello (SV), on

  • 21-02-2020 15:41:42 (UTC)
  • 21-02-2020 16:41:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1, 8.13 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Zuccarello SV 1 309 309
Cisano sul Neva SV 2 2085 2394
Arnasco SV 3 645 3039
Castelvecchio di Rocca Barbena SV 3 145 3184
Erli SV 4 245 3429
Castelbianco SV 4 330 3759
Balestrino SV 5 595 4354
Vendone SV 5 388 4742
Ortovero SV 6 1586 6328
Villanova d'Albenga SV 6 2657 8985
Onzo SV 7 219 9204
Toirano SV 7 2644 11848
Garlenda SV 8 1254 13102
Nasino SV 8 207 13309
Boissano SV 8 2492 15801
Ceriale SV 8 5561 21362
Albenga SV 9 24213 45575
Borghetto Santo Spirito SV 9 4948 50523
Alto CN 10 128 50651
Aquila d'Arroscia IM 10 166 50817
Casanova Lerrone SV 10 749 51566
Ranzo IM 10 557 52123
Bardineto SV 10 756 52879
Alassio SV 11 10934 63813
Loano SV 11 11407 75220
Giustenice SV 12 977 76197
Stellanello SV 13 808 77005
Borghetto d'Arroscia IM 13 456 77461
Garessio CN 13 3244 80705
Testico SV 13 196 80901
Pietra Ligure SV 14 8992 89893
Caprauna CN 14 104 89997
Magliolo SV 14 974 90971
Tovo San Giacomo SV 14 2582 93553
Laigueglia SV 14 1810 95363
Vessalico IM 15 282 95645
Calizzano SV 15 1475 97120
Villa Faraldi IM 15 444 97564
Borgio Verezzi SV 16 2205 99769
Andora SV 16 7552 107321
Cesio IM 16 283 107604
Armo IM 17 111 107715
Calice Ligure SV 18 1730 109445
Rialto SV 18 564 110009
Chiusanico IM 18 607 110616
Pieve di Teco IM 18 1338 111954
Ormea CN 18 1617 113571
Caravonica IM 18 282 113853
Priola CN 18 701 114554
Diano Arentino IM 18 722 115276
Chiusavecchia IM 19 577 115853
Finale Ligure SV 19 11711 127564
San Bartolomeo al Mare IM 19 3129 130693
Diano San Pietro IM 20 1145 131838
Cervo IM 20 1187 133025
Lucinasco IM 20 272 133297

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Savona (61345 inhabitants)
42 Km NE of Sanremo (54807 inhabitants)
56 Km SE of Cuneo (56081 inhabitants)
73 Km W of Genova (586655 inhabitants)
89 Km S of Asti (76202 inhabitants)
98 Km SW of Alessandria (93943 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 0.4 2020-02-21
15:41:42
44.1 8.13 1 2020-07-18
21:08:39
Bollettino Sismico Italiano INGV 79967241
Reviewed
Rev100
ML 0.4 2020-02-21
15:41:42
44.11 8.11 5 2020-02-21
15:49:29
Sala Sismica INGV-Roma 76703211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-21 15:41:42 ± 0.19
Latitude 44.10 ± 0.01
Longitude 8.13 ± 0.02
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 79967241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1630
Semi-minor axis of confidence ellipse (meter) 830
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 323
Circular confidence region, given by single value of horizontal uncertainty (meter) 1630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 184
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
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) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.2707
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 79967241
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-07 01:18:28

ML:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 76703211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-21 15:49:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IMI.HHZ. 2020-02-21T15:41:48.23 0.1 undecidable manual P 221 0.2554 91 -0.05 99
IV.QLNO.HHZ. 2020-02-21T15:41:48.39 0.3 undecidable manual P 35 0.2707 91 -0.24 71
GU.GBOS.HHZ. 2020-02-21T15:41:47.94 0.1 undecidable manual P 304 0.2491 91 -0.19 97
GU.CANO.HHZ. 2020-02-21T15:41:45.72 0.1 undecidable manual P 37 0.1313 92 0.2 99
GU.RORO.HHZ. 2020-02-21T15:41:43.83 0.1 undecidable manual P 282 0.045 96 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RORO.HHE. ML:0 0.00035989345 0.064 AML other m 2020-02-21T15:41:44.60
GU.RORO.HHN. ML:0 0.00030810925 0.0768 AML other m 2020-02-21T15:41:44.79
GU.CANO.HHE. ML:0.4 2.800826E-5 1.3344 AML other m 2020-02-21T15:41:47.98
GU.CANO.HHN. ML:0.4 3.1216865E-5 0.1792 AML other m 2020-02-21T15:41:48.13
GU.GBOS.HHE. ML:0.2 7.559355E-6 0.7296 AML other m 2020-02-21T15:41:51.85
GU.GBOS.HHN. ML:0.2 1.20694095E-5 0.7936 AML other m 2020-02-21T15:41:51.97
IV.IMI.HHE. ML:0.4 1.667284E-5 0.9472 AML other m 2020-02-21T15:41:52.68
IV.IMI.HHN. ML:0.4 1.58492065E-5 0.6016 AML other m 2020-02-21T15:41:52.37
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