Earthquake (quarry blast) with magnitude of ML 1.0 on date 20-09-2018 and time 09:17:02 (UTC) in region 1 km W Pallare (SV)

A magnitude ML 1.0 (quarry blast) earthquake occured in region: 1 km W Pallare (SV), on

  • 20-09-2018 09:17:02 (UTC)
  • 20-09-2018 11:17:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.326, 8.266 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
Pallare SV 1 923 923
Plodio SV 4 650 1573
Carcare SV 4 5587 7160
Mallare SV 5 1146 8306
Cosseria SV 5 1105 9411
Bormida SV 6 387 9798
Altare SV 6 2108 11906
Millesimo SV 7 3383 15289
Roccavignale SV 7 752 16041
Osiglia SV 7 444 16485
Murialdo SV 8 841 17326
Cengio SV 8 3563 20889
Cairo Montenotte SV 8 13269 34158
Castelnuovo di Ceva CN 11 110 34268
Montezemolo CN 12 259 34527
Rialto SV 12 564 35091
Quiliano SV 12 7232 42323
Orco Feglino SV 13 890 43213
Saliceto CN 13 1323 44536
Vezzi Portio SV 13 809 45345
Calice Ligure SV 14 1730 47075
Dego SV 14 1985 49060
Perlo CN 15 116 49176
Camerana CN 15 631 49807
Priero CN 15 529 50336
Vado Ligure SV 15 8336 58672
Magliolo SV 15 974 59646
Calizzano SV 16 1475 61121
Massimino SV 16 113 61234
Spotorno SV 16 3803 65037
Sale delle Langhe CN 17 486 65523
Nucetto CN 17 430 65953
Bergeggi SV 17 1129 67082
Tovo San Giacomo SV 17 2582 69664
Giustenice SV 17 977 70641
Sale San Giovanni CN 17 183 70824
Gottasecca CN 17 148 70972
Giusvalla SV 17 441 71413
Savona SV 17 61345 132758
Noli SV 18 2736 135494
Bagnasco CN 18 1035 136529
Piana Crixia SV 18 788 137317
Bardineto SV 18 756 138073
Finale Ligure SV 18 11711 149784
Borgio Verezzi SV 19 2205 151989
Albissola Marina SV 19 5487 157476
Pontinvrea SV 19 847 158323
Paroldo CN 20 211 158534
Ceva CN 20 5782 164316
Monesiglio CN 20 645 164961
Pietra Ligure SV 20 8992 173953
Albisola Superiore SV 20 10163 184116
Castelletto Uzzone CN 20 331 184447
Stella SV 20 3009 187456

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km W of Savona (61345 inhabitants)
54 Km W of Genova (586655 inhabitants)
57 Km E of Cuneo (56081 inhabitants)
64 Km S of Asti (76202 inhabitants)
68 Km NE of Sanremo (54807 inhabitants)
71 Km SW of Alessandria (93943 inhabitants)
88 Km SE of Moncalieri (57294 inhabitants)
95 Km SE of Torino (890529 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 1.0 2018-09-20
09:17:02
44.3258 8.2663 1 2019-06-04
09:16:13
Bollettino Sismico Italiano INGV 67976381
Reviewed
Rev100
ML 0.9 2018-09-20
09:17:02
44.3103 8.2987 11 2018-09-20
09:49:07
Sala Sismica INGV-Roma 61144941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-20 09:17:02 ± 0.44
Latitude 44.3258 ± 0.0342
Longitude 8.2663 ± 0.0415
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 67976381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4520
Semi-minor axis of confidence ellipse (meter) 2110
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 321
Circular confidence region, given by single value of horizontal uncertainty (meter) 4520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
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) 0.77
Epicentral distance of station closest to the epicenter (degree) 0.05666
Epicentral distance of station farthest from the epicenter (degree) 0.49373
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:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 67976381
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-26 10:01:02

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 61144941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-20 09:49:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IMI.HHN. 2018-09-20T09:17:12.51 0.3 undecidable manual P 213 0.4937 91 -1.04 50
GU.GBOS.HHZ. 2018-09-20T09:17:10.45 0.1 undecidable manual P 255 0.3166 91 0.84 76
GU.PCP.HHZ. 2018-09-20T09:17:08.46 0.1 undecidable manual P 43 0.2932 91 -0.63 84
GU.RORO.HHZ. 2018-09-20T09:17:08.06 0.1 undecidable manual P 214 0.2572 91 -0.23 94
GU.CANO.HHZ. 2018-09-20T09:17:05.29 0.1 positive manual P 190 0.1196 92 0.05 100
IV.QLNO.HHZ. 2018-09-20T09:17:04.51 0.1 positive manual P 92 0.0567 95 0.67 86
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.QLNO.HHN. ML:0 6.525E-5 0.78 AML other m 2018-09-20T09:17:06.69
IV.QLNO.HHE. ML:0 0.00010155 0.42 AML other m 2018-09-20T09:17:07.25
GU.CANO.HHE. ML:1.3 0.000279 0.26 AML other m 2018-09-20T09:17:08.08
GU.CANO.HHN. ML:1 0.000145 0.56 AML other m 2018-09-20T09:17:09.35
GU.RORO.HHN. ML:0.9 3.77E-5 0.18 AML other m 2018-09-20T09:17:12.22
GU.RORO.HHE. ML:0.7 2.65E-5 0.5 AML other m 2018-09-20T09:17:14.56
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