Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.7 on date 04-02-2019 and time 12:12:27 (Italy) in region 5 km SE Dego (SV)

A magnitude ML 0.7 (quarry blast) earthquake occured in region: 5 km SE Dego (SV), on

  • 04-02-2019 11:12:27 (UTC)
  • 04-02-2019 12:12:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.4140, 8.3410 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.

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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 5 1985 1985
Cairo Montenotte SV 6 13269 15254
Giusvalla SV 6 441 15695
Carcare SV 7 5587 21282
Pontinvrea SV 8 847 22129
Piana Crixia SV 8 788 22917
Altare SV 9 2108 25025
Cosseria SV 10 1105 26130
Plodio SV 10 650 26780
Mioglia SV 10 526 27306
Cengio SV 11 3563 30869
Pallare SV 11 923 31792
Pareto AL 12 554 32346
Millesimo SV 12 3383 35729
Merana AL 12 189 35918
Stella SV 12 3009 38927
Roccavignale SV 13 752 39679
Saliceto CN 14 1323 41002
Sassello SV 14 1777 42779
Mallare SV 14 1146 43925
Spigno Monferrato AL 14 1050 44975
Quiliano SV 15 7232 52207
Gottasecca CN 15 148 52355
Castelletto Uzzone CN 15 331 52686
Albisola Superiore SV 16 10163 62849
Camerana CN 16 631 63480
Albissola Marina SV 16 5487 68967
Savona SV 16 61345 130312
Montezemolo CN 16 259 130571
Serole AT 17 123 130694
Bormida SV 17 387 131081
Malvicino AL 17 85 131166
Mombaldone AT 17 209 131375
Prunetto CN 18 451 131826
Vado Ligure SV 18 8336 140162
Murialdo SV 18 841 141003
Castelnuovo di Ceva CN 18 110 141113
Celle Ligure SV 18 5237 146350
Pezzolo Valle Uzzone CN 18 344 146694
Osiglia SV 18 444 147138
Monesiglio CN 19 645 147783
Bergolo CN 20 71 147854
Gorzegno CN 20 304 148158
Varazze SV 20 13251 161409
Bergeggi SV 20 1129 162538

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of Savona (61345 inhabitants)
47 Km W of Genova (586655 inhabitants)
55 Km S of Asti (76202 inhabitants)
60 Km SW of Alessandria (93943 inhabitants)
63 Km E of Cuneo (56081 inhabitants)
79 Km NE of Sanremo (54807 inhabitants)
83 Km SE of Moncalieri (57294 inhabitants)
90 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 0.7 2019-02-04
11:12:27		 44.4142 8.3412 1 2019-08-22
08:25:03		 Bollettino Sismico Italiano INGV 69724591
Reviewed
Rev100 		ML 0.8 2019-02-04
11:12:26		 44.3997 8.3812 10 2019-02-04
11:22:44		 Sala Sismica INGV-Roma 65203161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-04 11:12:27 ± 0.28
Latitude 44.4142 ± 0.0189
Longitude 8.3412 ± 0.0302
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 69724591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2910
Semi-minor axis of confidence ellipse (meter) 1390
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 310
Circular confidence region, given by single value of horizontal uncertainty (meter) 2910.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.08993
Epicentral distance of station farthest from the epicenter (degree) 0.39750
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.8
Num. used stations 5
Type of magnitude ML
Reference to an origin 69724591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-06-20 06:34:32

ML:0.8

Field Value
Value 0.8
Uncertainty 0.7
Num. used stations 5
Type of magnitude ML
Reference to an origin 65203161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-04 11:22:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GBOS.HHE. 2019-02-04T11:12:36.50 0.3 undecidable manual P 244 44.1225 91 0.33 70
GU.RORO.HHE. 2019-02-04T11:12:34.86 0.3 undecidable manual P 213 40.0266 91 -0.48 68
GU.CANO.HHZ. 2019-02-04T11:12:32.02 0.3 undecidable manual P 200 24.3534 91 -0.19 75
GU.PCP.HHZ. 2019-02-04T11:12:31.57 0.3 undecidable manual P 49 21.4674 91 -0.05 77
IV.QLNO.HHZ. 2019-02-04T11:12:29.61 0.1 undecidable manual P 178 9.9789 93 0.28 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.QLNO.HHE. ML:0.0 0.00001919899 0.0576 AML other m 2019-02-04T11:12:30.75
IV.QLNO.HHN. ML:0.1 0.00002578896 0.064 AML other m 2019-02-04T11:12:31.65
GU.CANO.HHN. ML:0.7 0.000032560125 0.2176 AML other m 2019-02-04T11:12:36.04
IV.SARZ.HNN. ML:2.0 0.00017574135 0.1216 AML other m 2019-02-04T11:12:45.62
IV.SARZ.HHN. ML:2.2 0.0002477309 1.8208 AML other m 2019-02-04T11:12:45.04
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