Earthquake (quarry blast) with magnitude of ML 0.9 on date 07-09-2018 and time 11:51:49 (UTC) in region 2 km SE Roccavignale (SV)

A magnitude ML 0.9 (quarry blast) earthquake occured in region: 2 km SE Roccavignale (SV), on

  • 07-09-2018 11:51:49 (UTC)
  • 07-09-2018 13:51:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.347, 8.2 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 2 752 752
Millesimo SV 2 3383 4135
Plodio SV 4 650 4785
Cosseria SV 4 1105 5890
Murialdo SV 5 841 6731
Cengio SV 5 3563 10294
Castelnuovo di Ceva CN 6 110 10404
Montezemolo CN 6 259 10663
Pallare SV 6 923 11586
Osiglia SV 7 444 12030
Carcare SV 7 5587 17617
Saliceto CN 8 1323 18940
Bormida SV 8 387 19327
Cairo Montenotte SV 8 13269 32596
Priero CN 9 529 33125
Perlo CN 9 116 33241
Camerana CN 10 631 33872
Mallare SV 10 1146 35018
Sale delle Langhe CN 11 486 35504
Nucetto CN 11 430 35934
Sale San Giovanni CN 11 183 36117
Massimino SV 11 113 36230
Altare SV 12 2108 38338
Gottasecca CN 13 148 38486
Bagnasco CN 13 1035 39521
Ceva CN 14 5782 45303
Paroldo CN 14 211 45514
Calizzano SV 14 1475 46989
Dego SV 15 1985 48974
Monesiglio CN 15 645 49619
Rialto SV 15 564 50183
Battifollo CN 15 219 50402
Roascio CN 16 97 50499
Mombarcaro CN 16 268 50767
Torresina CN 16 52 50819
Castelletto Uzzone CN 16 331 51150
Prunetto CN 17 451 51601
Scagnello CN 17 194 51795
Orco Feglino SV 17 890 52685
Calice Ligure SV 18 1730 54415
Magliolo SV 18 974 55389
Piana Crixia SV 18 788 56177
Priola CN 18 701 56878
Quiliano SV 18 7232 64110
Lisio CN 18 201 64311
Bardineto SV 18 756 65067
Mombasiglio CN 18 609 65676
Igliano CN 18 74 65750
Vezzi Portio SV 18 809 66559
Gorzegno CN 19 304 66863
Giusvalla SV 19 441 67304
Lesegno CN 19 794 68098
Castellino Tanaro CN 20 312 68410
San Benedetto Belbo CN 20 179 68589
Viola CN 20 391 68980
Giustenice SV 20 977 69957
Tovo San Giacomo SV 20 2582 72539

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km W of Savona (61345 inhabitants)
52 Km E of Cuneo (56081 inhabitants)
59 Km W of Genova (586655 inhabitants)
62 Km S of Asti (76202 inhabitants)
67 Km NE of Sanremo (54807 inhabitants)
71 Km SW of Alessandria (93943 inhabitants)
83 Km SE of Moncalieri (57294 inhabitants)
91 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 0.9 2018-09-07
11:51:49
44.3473 8.1998 1 2019-06-04
09:16:14
Bollettino Sismico Italiano INGV 68183331
Reviewed
Rev100
ML 0.9 2018-09-07
11:51:49
44.3248 8.2247 11 2018-09-07
11:57:23
Sala Sismica INGV-Roma 60659481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-07 11:51:49 ± 0.11
Latitude 44.3473 ± 0.0072
Longitude 8.1998 ± 0.0075
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 68183331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 890
Semi-minor axis of confidence ellipse (meter) 470
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 325
Circular confidence region, given by single value of horizontal uncertainty (meter) 890
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
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) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.48923
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 8
Type of magnitude ML
Reference to an origin 68183331
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-05-02 12:04:34

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 60659481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-07 11:57:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IMI.HHN. 2018-09-07T11:52:00.18 0.3 undecidable manual P 207 0.4892 91 -0.1 69
GU.PCP.HHZ. 2018-09-07T11:51:56.24 0.1 undecidable manual P 52 0.3139 91 -0.14 95
GU.GBOS.HHE. 2018-09-07T11:51:55.75 0.1 undecidable manual P 248 0.2779 91 0.15 95
GU.RORO.HHZ. 2018-09-07T11:51:54.97 0.1 undecidable manual P 202 0.2536 91 -0.09 97
GU.CANO.HHZ. 2018-09-07T11:51:52.54 0.1 undecidable manual P 169 0.1421 92 -0.04 100
IV.QLNO.HHZ. 2018-09-07T11:51:51.98 0.1 positive manual P 102 0.107 92 0.19 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.QLNO.HHN. ML:0.9 0.000125 0.28 AML other m 2018-09-07T11:51:54.81
IV.QLNO.HHE. ML:0.9 0.0001135 0.74 AML other m 2018-09-07T11:51:55.77
GU.CANO.HHN. ML:1.1 0.000155 0.2 AML other m 2018-09-07T11:51:56.31
GU.CANO.HHE. ML:1.2 0.0001685 1.02 AML other m 2018-09-07T11:51:57.33
GU.RORO.HHE. ML:0.6 2.505E-5 0.18 AML other m 2018-09-07T11:51:59.51
GU.RORO.HHN. ML:0.7 2.85E-5 0.54 AML other m 2018-09-07T11:51:59.76
GU.PCP.HHE. ML:0.7 1.99E-5 1 AML other m 2018-09-07T11:52:02.86
GU.PCP.HHN. ML:0.7 1.75E-5 0.94 AML other m 2018-09-07T11:52:06.11
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