Earthquake (quarry blast) with magnitude of ML 0.8 on date 22-11-2017 and time 10:09:06 (UTC) in region 3 km W Dego (SV)

A magnitude ML 0.8 (quarry blast) earthquake occured in region: 3 km W Dego (SV), on

  • 22-11-2017 10:09:06 (UTC)
  • 22-11-2017 11:09:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.44, 8.28 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
Dego SV 3 1985 1985
Cairo Montenotte SV 5 13269 15254
Piana Crixia SV 5 788 16042
Cengio SV 8 3563 19605
Merana AL 8 189 19794
Gottasecca CN 9 148 19942
Cosseria SV 9 1105 21047
Castelletto Uzzone CN 9 331 21378
Giusvalla SV 9 441 21819
Saliceto CN 9 1323 23142
Carcare SV 10 5587 28729
Plodio SV 10 650 29379
Millesimo SV 11 3383 32762
Camerana CN 11 631 33393
Roccavignale SV 11 752 34145
Pareto AL 12 554 34699
Prunetto CN 12 451 35150
Mioglia SV 12 526 35676
Spigno Monferrato AL 12 1050 36726
Serole AT 12 123 36849
Pezzolo Valle Uzzone CN 13 344 37193
Pontinvrea SV 13 847 38040
Monesiglio CN 13 645 38685
Pallare SV 13 923 39608
Montezemolo CN 13 259 39867
Altare SV 13 2108 41975
Gorzegno CN 14 304 42279
Bergolo CN 14 71 42350
Levice CN 14 231 42581
Mombaldone AT 15 209 42790
Mombarcaro CN 15 268 43058
Castelnuovo di Ceva CN 15 110 43168
Olmo Gentile AT 16 80 43248
Sale delle Langhe CN 16 486 43734
Paroldo CN 16 211 43945
Priero CN 16 529 44474
Torre Bormida CN 16 200 44674
Sale San Giovanni CN 17 183 44857
Cortemilia CN 17 2331 47188
Roccaverano AT 17 399 47587
Malvicino AL 17 85 47672
Murialdo SV 17 841 48513
Mallare SV 17 1146 49659
Sassello SV 17 1777 51436
Niella Belbo CN 18 372 51808
Feisoglio CN 18 316 52124
Denice AL 18 176 52300
Perletto CN 18 292 52592
Stella SV 18 3009 55601
San Benedetto Belbo CN 18 179 55780
Cravanzana CN 19 411 56191
Bormida SV 19 387 56578
Montechiaro d'Acqui AL 19 560 57138
San Giorgio Scarampi AT 19 122 57260
Osiglia SV 19 444 57704
Torresina CN 19 52 57756
Bossolasco CN 20 679 58435
Perlo CN 20 116 58551
Quiliano SV 20 7232 65783
Cartosio AL 20 747 66530

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Savona (61345 inhabitants)
51 Km S of Asti (76202 inhabitants)
52 Km W of Genova (586655 inhabitants)
58 Km E of Cuneo (56081 inhabitants)
59 Km SW of Alessandria (93943 inhabitants)
78 Km SE of Moncalieri (57294 inhabitants)
80 Km NE of Sanremo (54807 inhabitants)
84 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 0.8 2017-11-22
10:09:06
44.44 8.28 0 2018-09-04
09:09:18
Bollettino Sismico Italiano INGV 58019731
Rev 100 ML 0.8 2017-11-22
10:09:05
44.43 8.33 9 2017-11-22
10:14:34
Sala Sismica INGV-Roma 52052021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-11-22 10:09:06 ± 0.05
Latitude 44.44 ± 0.00
Longitude 8.28 ± 0.01
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 58019731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 480
Semi-minor axis of confidence ellipse (meter) 140
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 308
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 218
Number of associated phases, regardless of their use for origin computation 4
Number of defining phases 4
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.04
Epicentral distance of station closest to the epicenter (degree) 0.1304
Epicentral distance of station farthest from the epicenter (degree) 0.36512
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 58019731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-06-21 14:04:20

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 52052021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-11-22 10:14:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.RORO.HHZ. 2017-11-22T10:09:14.27 0.1 undecidable manual P 205 0.3651 90 0.02 97
GU.CANO.HHZ. 2017-11-22T10:09:11.41 0.1 undecidable manual P 187 0.2392 90 -0.03 99
GU.PCP.HHZ. 2017-11-22T10:09:10.88 0.1 undecidable manual P 63 0.214 90 0 100
IV.QLNO.HHZ. 2017-11-22T10:09:09.04 0.3 undecidable manual P 158 0.1304 90 0.02 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.QLNO.HHN. ML:0.8 7.8164935E-5 0.92 AML other m 2017-11-22T10:09:10.72
IV.QLNO.HHE. ML:0.8 7.217406E-5 1.22 AML other m 2017-11-22T10:09:12.81
GU.CANO.HHN. ML:0.9 4.383414E-5 0.56 AML other m 2017-11-22T10:09:17.46
GU.PCP.HHE. ML:0.6 2.6009855E-5 0.44 AML other m 2017-11-22T10:09:20.33
GU.PCP.HHN. ML:0.7 3.5720925E-5 0.4 AML other m 2017-11-22T10:09:22.28
GU.CANO.HHE. ML:0.9 5.2407705E-5 1.08 AML other m 2017-11-22T10:09:24.33
GU.RORO.HHN. ML:0.8 2.2342645E-5 0.68 AML other m 2017-11-22T10:09:30.51
GU.RORO.HHE. ML:0.9 2.925458E-5 0.1 AML other m 2017-11-22T10:09:34.93
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