Earthquake (quarry blast) with magnitude of ML 0.9 on date 30-11-2020 and time 11:04:12 (Italy) in region 1 km NW Cisano sul Neva (SV)

A magnitude ML 0.9 (quarry blast) earthquake occured in region: 1 km NW Cisano sul Neva (SV), on

  • 30-11-2020 10:04:12 (UTC)
  • 30-11-2020 11:04:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.09, 8.14 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
Cisano sul Neva SV 1 2085 2085
Zuccarello SV 3 309 2394
Arnasco SV 3 645 3039
Balestrino SV 5 595 3634
Castelvecchio di Rocca Barbena SV 5 145 3779
Villanova d'Albenga SV 5 2657 6436
Vendone SV 5 388 6824
Erli SV 6 245 7069
Ortovero SV 6 1586 8655
Castelbianco SV 6 330 8985
Toirano SV 7 2644 11629
Garlenda SV 7 1254 12883
Onzo SV 7 219 13102
Ceriale SV 8 5561 18663
Albenga SV 8 24213 42876
Boissano SV 8 2492 45368
Borghetto Santo Spirito SV 9 4948 50316
Nasino SV 9 207 50523
Alassio SV 10 10934 61457
Casanova Lerrone SV 10 749 62206
Ranzo IM 11 557 62763
Loano SV 11 11407 74170
Aquila d'Arroscia IM 11 166 74336
Alto CN 11 128 74464
Bardineto SV 11 756 75220
Stellanello SV 12 808 76028
Giustenice SV 13 977 77005
Testico SV 13 196 77201
Borghetto d'Arroscia IM 13 456 77657
Laigueglia SV 13 1810 79467
Pietra Ligure SV 13 8992 88459
Tovo San Giacomo SV 14 2582 91041
Magliolo SV 14 974 92015
Villa Faraldi IM 14 444 92459
Garessio CN 15 3244 95703
Caprauna CN 15 104 95807
Andora SV 15 7552 103359
Vessalico IM 15 282 103641
Borgio Verezzi SV 15 2205 105846
Cesio IM 16 283 106129
Calizzano SV 16 1475 107604
Chiusanico IM 18 607 108211
Diano Arentino IM 18 722 108933
Calice Ligure SV 18 1730 110663
Armo IM 18 111 110774
Rialto SV 18 564 111338
Caravonica IM 18 282 111620
San Bartolomeo al Mare IM 18 3129 114749
Pieve di Teco IM 19 1338 116087
Chiusavecchia IM 19 577 116664
Finale Ligure SV 19 11711 128375
Cervo IM 19 1187 129562
Diano San Pietro IM 19 1145 130707
Ormea CN 19 1617 132324
Diano Castello IM 20 2214 134538
Priola CN 20 701 135239
Lucinasco IM 20 272 135511
Pontedassio IM 20 2323 137834

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Savona (61345 inhabitants)
41 Km NE of Sanremo (54807 inhabitants)
58 Km SE of Cuneo (56081 inhabitants)
73 Km W of Genova (586655 inhabitants)
90 Km S of Asti (76202 inhabitants)
99 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 0.9 2020-11-30
10:04:12
44.09 8.14 1 2021-02-26
14:56:09
Bollettino Sismico Italiano INGV 85199621
Reviewed
Rev100
ML 0.9 2020-11-30
10:04:12
44.11 8.1 6 2020-11-30
10:27:03
Sala Sismica INGV-Roma 85104881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-30 10:04:12 ± 0.39
Latitude 44.09 ± 0.02
Longitude 8.14 ± 0.03
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 85199621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3200
Semi-minor axis of confidence ellipse (meter) 1510
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 324
Circular confidence region, given by single value of horizontal uncertainty (meter) 3200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 191
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.49
Epicentral distance of station closest to the epicenter (degree) 0.05576
Epicentral distance of station farthest from the epicenter (degree) 0.5342
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85199621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-28 15:25:17

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 85104881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-30 10:27:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PCP.HHZ. 2020-11-30T10:04:23.63 0.3 undecidable manual P 33 0.5342 90 -0.83 56
GU.GBOS.HHZ. 2020-11-30T10:04:18.08 0.3 undecidable manual P 305 0.2608 91 -0.3 71
IV.QLNO.HHZ. 2020-11-30T10:04:18.69 0.6 undecidable manual P 33 0.2752 91 0 50
IV.IMI.HHZ. 2020-11-30T10:04:18.18 0.3 undecidable manual P 224 0.2536 91 -0.04 75
GU.CANO.HHZ. 2020-11-30T10:04:16.11 0.1 undecidable manual P 32 0.1349 92 0.54 91
GU.RORO.HHZ. 2020-11-30T10:04:14.02 0.1 undecidable manual P 291 0.0558 95 0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RORO.HHE. ML:0 0.0007195 1.3 AML other m 2020-11-30T10:04:14.85
GU.RORO.HHN. ML:0 0.000656 0.24 AML other m 2020-11-30T10:04:15.07
GU.CANO.HHE. ML:1.3 0.000229 1.52 AML other m 2020-11-30T10:04:18.09
GU.CANO.HHN. ML:1 0.000129 0.34 AML other m 2020-11-30T10:04:19.51
IV.IMI.HHE. ML:0.8 3.685E-5 1.02 AML other m 2020-11-30T10:04:22.78
GU.GBOS.HHN. ML:0.7 2.605E-5 0.98 AML other m 2020-11-30T10:04:22.81
GU.GBOS.HHE. ML:0.8 3.03E-5 1.52 AML other m 2020-11-30T10:04:22.81
IV.IMI.HHN. ML:1 6.21E-5 1.22 AML other m 2020-11-30T10:04:23.38
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