Earthquake (quarry blast) with magnitude of ML 0.7 on date 21-09-2018 and time 17:11:21 (Italy) in region 1 km W Roccavignale (SV)

A magnitude ML 0.7 (quarry blast) earthquake occured in region: 1 km W Roccavignale (SV), on

  • 21-09-2018 15:11:21 (UTC)
  • 21-09-2018 17:11:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.36, 8.18 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
Roccavignale SV 1 752 752
Millesimo SV 2 3383 4135
Montezemolo CN 3 259 4394
Castelnuovo di Ceva CN 4 110 4504
Cengio SV 4 3563 8067
Cosseria SV 5 1105 9172
Murialdo SV 5 841 10013
Plodio SV 6 650 10663
Saliceto CN 6 1323 11986
Priero CN 7 529 12515
Camerana CN 7 631 13146
Perlo CN 8 116 13262
Sale delle Langhe CN 8 486 13748
Sale San Giovanni CN 9 183 13931
Pallare SV 9 923 14854
Cairo Montenotte SV 9 13269 28123
Carcare SV 9 5587 33710
Osiglia SV 9 444 34154
Nucetto CN 10 430 34584
Bormida SV 10 387 34971
Massimino SV 11 113 35084
Gottasecca CN 11 148 35232
Paroldo CN 11 211 35443
Ceva CN 12 5782 41225
Monesiglio CN 12 645 41870
Mallare SV 13 1146 43016
Bagnasco CN 13 1035 44051
Roascio CN 14 97 44148
Torresina CN 14 52 44200
Altare SV 14 2108 46308
Mombarcaro CN 14 268 46576
Battifollo CN 14 219 46795
Prunetto CN 14 451 47246
Dego SV 15 1985 49231
Castelletto Uzzone CN 15 331 49562
Calizzano SV 15 1475 51037
Scagnello CN 15 194 51231
Igliano CN 16 74 51305
Mombasiglio CN 16 609 51914
Lisio CN 17 201 52115
Gorzegno CN 17 304 52419
Castellino Tanaro CN 17 312 52731
San Benedetto Belbo CN 17 179 52910
Piana Crixia SV 17 788 53698
Lesegno CN 17 794 54492
Murazzano CN 18 834 55326
Rialto SV 18 564 55890
Priola CN 18 701 56591
Marsaglia CN 18 245 56836
Niella Belbo CN 18 372 57208
Viola CN 19 391 57599
Monasterolo Casotto CN 19 89 57688
Bardineto SV 19 756 58444
Levice CN 20 231 58675
Pezzolo Valle Uzzone CN 20 344 59019
Orco Feglino SV 20 890 59909
Merana AL 20 189 60098
Giusvalla SV 20 441 60539
Magliolo SV 20 974 61513
Calice Ligure SV 20 1730 63243

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Savona (61345 inhabitants)
50 Km E of Cuneo (56081 inhabitants)
60 Km S of Asti (76202 inhabitants)
60 Km W of Genova (586655 inhabitants)
68 Km NE of Sanremo (54807 inhabitants)
70 Km SW of Alessandria (93943 inhabitants)
81 Km SE of Moncalieri (57294 inhabitants)
88 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
Rev 1000 ML 0.7 2018-09-21
15:11:21
44.36 8.18 1 2019-06-04
09:16:13
Bollettino Sismico Italiano INGV 67977501
Rev 100 ML 0.7 2018-09-21
15:11:21
44.33 8.22 11 2018-09-21
15:24:57
Sala Sismica INGV-Roma 61182721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-21 15:11:21 ± 0.19
Latitude 44.36 ± 0.01
Longitude 8.18 ± 0.01
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 67977501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1470
Semi-minor axis of confidence ellipse (meter) 760
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) 1470
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 173
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.41549
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 67977501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-26 10:41:37

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 61182721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-21 15:24:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SGTA.HHZ. 2018-09-21T15:13:10.88 3.0 undecidable manual Pg 17.219999 0
OB.GAVE.EHZ. 2018-09-21T15:13:05.45 3.0 undecidable manual Sn -2.38 0
IV.CTI.HHZ. 2018-09-21T15:13:01.92 3.0 undecidable manual Sg 11.66 0
IV.BRIS.HHZ. 2018-09-21T15:12:43.23 3.0 undecidable manual Sg 4.27 0
IV.GIUL.HHZ. 2018-09-21T15:12:43.87 3.0 positive manual Pg 11.55 0
IV.IMOL.HNZ. 2018-09-21T15:12:42.77 3.0 undecidable manual Sg 4.24 0
IV.MGAB.HHZ. 2018-09-21T15:12:41.02 3.0 undecidable manual Sn -9.99 0
MN.TRI.HHZ. 2018-09-21T15:12:37.78 3.0 negative manual Pg 10.34 0
IV.FIAM.HHZ. 2018-09-21T15:12:35.35 3.0 positive manual Pg 9.58 0
IV.LIK.EHZ.01 2018-09-21T15:12:35.69 3.0 negative manual Pn 0.35 0
IV.LPEL.HHZ. 2018-09-21T15:12:29.57 3.0 positive manual Pn -7.21 0
IV.ZONE.HHZ. 2018-09-21T15:12:21.95 3.0 undecidable manual Sg -3.78 0
IV.SAMA.HHZ. 2018-09-21T15:12:20.32 3.0 negative manual Pn -4.74 0
IV.PARC.HHZ. 2018-09-21T15:12:17.27 3.0 undecidable manual Pg 6.8 0
OB.GAVE.EHZ. 2018-09-21T15:12:14.51 3.0 undecidable manual Pn -6.54 0
IV.OSSC.HHZ. 2018-09-21T15:11:55.16 3.0 negative manual Pn -6.21 0
IV.NDIM.HHZ. 2018-09-21T15:11:54.93 3.0 negative manual Pg -2.6 0
GU.MGRO.HNZ. 2018-09-21T15:11:30.79 0.3 undecidable manual P 220 0.4155 91 -0.29 68
GU.GBOS.HHZ. 2018-09-21T15:11:28.19 0.3 undecidable manual P 243 0.2698 91 0.35 69
GU.PCP.HHZ. 2018-09-21T15:11:28.74 0.3 undecidable manual P 56 0.3175 91 -0.17 71
GU.RORO.HHZ. 2018-09-21T15:11:27.57 0.1 undecidable manual P 198 0.2635 91 -0.13 97
GU.CANO.HHZ. 2018-09-21T15:11:25.49 0.1 undecidable manual P 164 0.1619 92 0.05 100
IV.QLNO.HHZ. 2018-09-21T15:11:24.82 0.1 undecidable manual P 108 0.1268 92 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.QLNO.HHE. ML:0.4 3.404627E-5 0.1408 AML other m 2018-09-21T15:11:26.78
IV.QLNO.HHN. ML:0.6 5.5153245E-5 0.192 AML other m 2018-09-21T15:11:27.14
GU.CANO.HHE. ML:0.9 7.1254785E-5 0.4992 AML other m 2018-09-21T15:11:27.62
GU.CANO.HHN. ML:1.1 0.0001125 0.14 AML other m 2018-09-21T15:11:28.16
GU.RORO.HHE. ML:0.6 1.77392425E-5 0.128 AML other m 2018-09-21T15:11:32.16
GU.RORO.HHN. ML:0.7 2.5853875E-5 0.192 AML other m 2018-09-21T15:11:32.32
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