Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 19-04-2015 and time 22:44:04 (UTC) in region 1 km W Gaggio Montano (BO)

A magnitude ML 1.6 earthquake occured in region: 1 km W Gaggio Montano (BO), on

  • 19-04-2015 22:44:04 (UTC)
  • 20-04-2015 00:44:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1990, 10.9210 at 18 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Gaggio Montano BO 1 4878 4878
Lizzano in Belvedere BO 5 2212 7090
Alto Reno Terme BO 7 6960 14050
Montese MO 8 3353 17403
Fanano MO 10 2989 20392
Castel di Casio BO 10 3448 23840
Castel d'Aiano BO 11 1906 25746
Sambuca Pistoiese PT 12 1626 27372
Sestola MO 12 2508 29880
Camugnano BO 14 1885 31765
Montecreto MO 17 940 32705
Cutigliano PT 17 1488 34193
Pavullo nel Frignano MO 17 17383 51576
Zocca MO 17 4719 56295
Vergato BO 18 7639 63934
San Marcello Pistoiese PT 19 6416 70350
Grizzana Morandi BO 20 3916 74266
Lama Mocogno MO 20 2734 77000
Castiglione dei Pepoli BO 20 5648 82648

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of Pistoia (90315 inhabitants)
38 Km NW of Prato (191150 inhabitants)
47 Km SW of Bologna (386663 inhabitants)
50 Km S of Modena (184973 inhabitants)
52 Km NE of Lucca (89046 inhabitants)
53 Km NW of Scandicci (50609 inhabitants)
55 Km NW of Firenze (382808 inhabitants)
60 Km SE of Reggio nell'Emilia (171345 inhabitants)
65 Km E of Massa (69479 inhabitants)
65 Km NE of Viareggio (62467 inhabitants)
65 Km S of Carpi (70699 inhabitants)
66 Km W of Imola (69797 inhabitants)
67 Km E of Carrara (63133 inhabitants)
68 Km NE of Pisa (89158 inhabitants)
77 Km W of Faenza (58541 inhabitants)
82 Km SE of Parma (192836 inhabitants)
87 Km NE of Livorno (159219 inhabitants)
88 Km E of La Spezia (93959 inhabitants)
89 Km W of Forlì (117913 inhabitants)
90 Km SW of Ferrara (133155 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 1.6 2015-04-19
22:44:04		 44.1988 10.9212 18 2015-10-19
09:28:02		 Bollettino Sismico Italiano INGV 18720291
Reviewed
Rev100 		ML 1.6 2015-04-19
22:44:04		 44.1823 10.9058 22 2015-04-19
23:30:22		 Sala Sismica INGV-Roma 18545271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-04-19 22:44:04 ± 0.15
Latitude 44.1988 ± 0.0054
Longitude 10.9212 ± 0.0075
Depth (km) 18 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 18720291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 561
Semi-minor axis of confidence ellipse (meter) 506
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 354
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.14749
Epicentral distance of station farthest from the epicenter (degree) 0.55488
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 18545271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-04-19 23:30:22

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 18720291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-27 05:43:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ERBM.EHE. 2015-04-19T22:44:19.14 0.6 undecidable manual S 301 47.2194 102 -0.27 44
MN.VLC.HHZ. 2015-04-19T22:44:18.29 0.3 undecidable manual S 264 42.7239 104 0.04 71
GU.SARM.HHZ. 2015-04-19T22:44:17.57 0.6 undecidable manual S 268 41.4252 104 -0.34 44
IV.PII.HHZ. 2015-04-19T22:44:15.39 0.6 undecidable manual P 211 61.5939 99 0.24 46
IV.BDI.HHZ. 2015-04-19T22:44:14.83 0.1 undecidable manual S 240 29.9478 111 -0.15 94
IV.ERBM.EHE. 2015-04-19T22:44:13.13 0.1 undecidable manual P 301 47.2194 102 0.17 96
IV.MTCR.EHZ. 2015-04-19T22:44:12.67 0.3 undecidable manual S 161 20.0688 124 0.05 76
GU.SARM.HHZ. 2015-04-19T22:44:12.05 0.1 undecidable manual P 268 41.4252 104 -0.05 94
GU.POPM.HHZ. 2015-04-19T22:44:12.97 0.1 undecidable manual S 218 21.4674 122 0.01 100
MN.VLC.HHZ. 2015-04-19T22:44:12.33 0.3 undecidable manual P 264 42.7239 104 0.04 71
IV.FNVD.HHE. 2015-04-19T22:44:11.50 0.6 undecidable manual S 102 16.3725 131 -0.36 47
IV.BDI.HHZ. 2015-04-19T22:44:10.31 0.1 undecidable manual P 240 29.9478 111 -0.09 95
IV.MTCR.EHZ. 2015-04-19T22:44:09.21 0.1 undecidable manual P 161 20.0688 124 0.17 99
GU.POPM.HHZ. 2015-04-19T22:44:09.28 0.1 undecidable manual P 218 21.4674 122 0.05 100
IV.ZCCA.HHZ. 2015-04-19T22:44:09.02 0.1 undecidable manual P 15 17.4714 129 0.3 98
IV.FNVD.HHE. 2015-04-19T22:44:08.38 0.1 undecidable manual P 102 16.3725 131 -0.22 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BDI.HHE. ML:1.4 0.00009470000000000001 0.96 AML other m 2015-04-19T22:44:15.53
IV.BDI.HHN. ML:1.6 0.000164 0.42 AML other m 2015-04-19T22:44:15.38
IV.PII.HHE. ML:1.5 0.000054449999999999995 0.24 AML other m 2015-04-19T22:44:25.94
IV.PII.HHN. ML:1.3 0.00004085 0.96 AML other m 2015-04-19T22:44:27.18
GU.POPM.HHN. ML:1.9 0.0004735 0.14 AML other m 2015-04-19T22:44:13.13
GU.POPM.HHE. ML:2.0 0.0005570000000000001 0.18 AML other m 2015-04-19T22:44:13.39
GU.SARM.HHE. ML:1.2 0.00004315 0.28 AML other m 2015-04-19T22:44:18.27
GU.SARM.HHN. ML:1.5 0.00010355000000000001 0.48 AML other m 2015-04-19T22:44:18.18
MN.VLC.HNN. ML:1.7 0.00013385 1.08 AML other m 2015-04-19T22:44:18.80
MN.VLC.HNE. ML:1.7 0.000155 1.32 AML other m 2015-04-19T22:44:18.88
MN.VLC.HHE. ML:1.7 0.00014199999999999998 0.22 AML other m 2015-04-19T22:44:18.88
MN.VLC.HHN. ML:1.6 0.00012355 0.36 AML other m 2015-04-19T22:44:18.80
IV.ZCCA.HHE. ML:1.3 0.0001235 0.96 AML other m 2015-04-19T22:44:14.67
IV.ZCCA.HHN. ML:1.5 0.0002195 1.5 AML other m 2015-04-19T22:44:14.06
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