Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 18-04-2015 and time 04:49:04 (Italy) in region 3 km W Gaggio Montano (BO)

A magnitude ML 1.5 earthquake occured in region: 3 km W Gaggio Montano (BO), on

  • 18-04-2015 02:49:04 (UTC)
  • 18-04-2015 04:49:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2010, 10.9040 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 3 4878 4878
Lizzano in Belvedere BO 4 2212 7090
Alto Reno Terme BO 8 6960 14050
Montese MO 8 3353 17403
Fanano MO 9 2989 20392
Sestola MO 11 2508 22900
Castel di Casio BO 11 3448 26348
Castel d'Aiano BO 12 1906 28254
Sambuca Pistoiese PT 13 1626 29880
Camugnano BO 15 1885 31765
Montecreto MO 16 940 32705
Cutigliano PT 16 1488 34193
Pavullo nel Frignano MO 17 17383 51576
Zocca MO 18 4719 56295
Lama Mocogno MO 18 2734 59029
San Marcello Pistoiese PT 18 6416 65445
Vergato BO 19 7639 73084
Abetone PT 20 621 73705

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km N of Pistoia (90315 inhabitants)
39 Km NW of Prato (191150 inhabitants)
48 Km SW of Bologna (386663 inhabitants)
50 Km S of Modena (184973 inhabitants)
51 Km NE of Lucca (89046 inhabitants)
54 Km NW of Scandicci (50609 inhabitants)
56 Km NW of Firenze (382808 inhabitants)
59 Km SE of Reggio nell'Emilia (171345 inhabitants)
63 Km E of Massa (69479 inhabitants)
64 Km NE of Viareggio (62467 inhabitants)
65 Km S of Carpi (70699 inhabitants)
66 Km E of Carrara (63133 inhabitants)
67 Km W of Imola (69797 inhabitants)
67 Km NE of Pisa (89158 inhabitants)
79 Km W of Faenza (58541 inhabitants)
81 Km SE of Parma (192836 inhabitants)
86 Km E of La Spezia (93959 inhabitants)
86 Km NE of Livorno (159219 inhabitants)
91 Km W of Forlì (117913 inhabitants)
91 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 1.5 2015-04-18
02:49:04		 44.2007 10.9035 18 2015-10-19
09:28:02		 Bollettino Sismico Italiano INGV 21730551
Reviewed
Rev100 		ML 1.5 2015-04-18
02:49:04		 44.2075 10.8967 10 2015-04-18
03:06:37		 Sala Sismica INGV-Roma 18504381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-04-18 02:49:04 ± 0.22
Latitude 44.2007 ± 0.0090
Longitude 10.9035 ± 0.0075
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 21730551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 877
Semi-minor axis of confidence ellipse (meter) 469
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 188
Circular confidence region, given by single value of horizontal uncertainty (meter) 880.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.15918
Epicentral distance of station farthest from the epicenter (degree) 0.55038
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 21730551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-10-07 08:15:21

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 18504381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-04-18 03:06:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.VLC.HHZ. 2015-04-18T02:49:18.45 0.6 undecidable manual S 264 41.4252 103 0.2 46
IV.SEI.HHZ. 2015-04-18T02:49:18.49 0.6 undecidable manual S 114 39.7269 104 0.68 42
GU.CARD.HHZ. 2015-04-18T02:49:17.68 0.6 undecidable manual S 240 38.7279 105 0.11 47
GU.SARM.HHZ. 2015-04-18T02:49:17.88 0.6 undecidable manual S 268 40.0266 104 -0.02 48
IV.PII.HHZ. 2015-04-18T02:49:15.53 0.3 undecidable manual P 210 61.0944 98 0.09 69
IV.BDI.HHZ. 2015-04-18T02:49:15.19 0.3 undecidable manual S 238 28.8489 111 0.13 71
GU.POPM.HHZ. 2015-04-18T02:49:13.26 0.1 undecidable manual S 214 20.868 122 0.13 97
IV.ZCCA.HHZ. 2015-04-18T02:49:13.71 0.6 undecidable manual S 19 17.6712 127 1.29 31
IV.MTCR.EHZ. 2015-04-18T02:49:13.11 0.1 undecidable manual S 158 20.6682 122 0.01 100
GU.CARD.HHZ. 2015-04-18T02:49:12.03 0.3 undecidable manual P 240 38.7279 105 -0.02 72
GU.SARM.HHZ. 2015-04-18T02:49:12.10 0.1 undecidable manual P 268 40.0266 104 -0.14 94
MN.VLC.HHZ. 2015-04-18T02:49:12.46 0.1 undecidable manual P 264 41.4252 103 0.01 96
IV.SEI.HHZ. 2015-04-18T02:49:12.64 0.3 undecidable manual P 114 39.7269 104 0.44 67
IV.FNVD.HHZ. 2015-04-18T02:49:11.91 0.3 undecidable manual S 102 17.871 127 -0.56 66
IV.BDI.HHZ. 2015-04-18T02:49:10.41 0.1 undecidable manual P 238 28.8489 111 -0.2 94
IV.ZCCA.HHZ. 2015-04-18T02:49:09.07 0.1 positive manual P 19 17.6712 127 -0.01 100
IV.MTCR.EHZ. 2015-04-18T02:49:09.39 0.1 undecidable manual P 158 20.6682 122 -0.09 97
GU.POPM.HHZ. 2015-04-18T02:49:09.43 0.1 undecidable manual P 214 20.868 122 -0.06 98
IV.FNVD.HHZ. 2015-04-18T02:49:08.56 0.1 undecidable manual P 102 17.871 127 -0.55 88
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BDI.HNN. ML:1.7 0.0002385 0.44 AML other m 2015-04-18T02:49:15.52
IV.BDI.HNE. ML:1.8 0.00030300000000000005 0.42 AML other m 2015-04-18T02:49:15.55
IV.BDI.HHE. ML:1.8 0.000259 0.42 AML other m 2015-04-18T02:49:15.35
IV.BDI.HHN. ML:1.8 0.00028000000000000003 0.36 AML other m 2015-04-18T02:49:15.53
GU.CARD.HHN. ML:1.4 0.0000729 0.48 AML other m 2015-04-18T02:49:18.12
GU.CARD.HHE. ML:1.4 0.00008395 1.12 AML other m 2015-04-18T02:49:18.07
IV.FNVD.HHE. ML:1.2 0.00011064999999999999 0.88 AML other m 2015-04-18T02:49:13.07
IV.FNVD.HHN. ML:1.3 0.000134 0.22 AML other m 2015-04-18T02:49:13.02
IV.PII.HHN. ML:1.2 0.00003145 1.14 AML other m 2015-04-18T02:49:28.84
IV.PII.HHE. ML:1.2 0.0000278 1.2 AML other m 2015-04-18T02:49:30.07
GU.POPM.HHN. ML:1.9 0.000514 0.18 AML other m 2015-04-18T02:49:13.31
GU.POPM.HHE. ML:1.9 0.000519 0.14 AML other m 2015-04-18T02:49:13.68
GU.SARM.HHE. ML:1.2 0.0000482 0.22 AML other m 2015-04-18T02:49:18.44
GU.SARM.HHN. ML:1.3 0.00007045000000000002 0.2 AML other m 2015-04-18T02:49:18.23
IV.SEI.HHE. ML:1.7 0.000164 0.36 AML other m 2015-04-18T02:49:19.94
IV.SEI.HHN. ML:1.6 0.0001385 0.38 AML other m 2015-04-18T02:49:19.78
MN.VLC.HHN. ML:1.3 0.0000649 0.42 AML other m 2015-04-18T02:49:18.84
MN.VLC.HHE. ML:1.8 0.00017549999999999998 0.46 AML other m 2015-04-18T02:49:18.94
IV.ZCCA.HHN. ML:1.4 0.00016450000000000001 0.38 AML other m 2015-04-18T02:49:09.37
IV.ZCCA.HHE. ML:1.3 0.000125 0.34 AML other m 2015-04-18T02:49:09.71
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