Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 1.6 on date 23-01-2015 and time 08:20:31 (Italy) in region 2 km W Castiglione dei Pepoli (BO)

A magnitude Md 1.6 earthquake occured in region: 2 km W Castiglione dei Pepoli (BO), on

  • 23-01-2015 07:20:31 (UTC)
  • 23-01-2015 08:20:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1380, 11.1320 at 10 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
Castiglione dei Pepoli BO 2 5648 5648
Camugnano BO 5 1885 7533
Castel di Casio BO 8 3448 10981
Vernio PO 10 6060 17041
Sambuca Pistoiese PT 11 1626 18667
San Benedetto Val di Sambro BO 12 4315 22982
Cantagallo PO 12 3105 26087
Alto Reno Terme BO 13 6960 33047
Grizzana Morandi BO 13 3916 36963
Vergato BO 16 7639 44602
Gaggio Montano BO 17 4878 49480
Monghidoro BO 17 3749 53229
Barberino di Mugello FI 18 10836 64065
Vaiano PO 19 9895 73960
Castel d'Aiano BO 19 1906 75866
Monzuno BO 19 6328 82194
Lizzano in Belvedere BO 19 2212 84406
Firenzuola FI 20 4726 89132

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NE of Pistoia (90315 inhabitants)
29 Km N of Prato (191150 inhabitants)
42 Km N of Firenze (382808 inhabitants)
42 Km N of Scandicci (50609 inhabitants)
43 Km SW of Bologna (386663 inhabitants)
52 Km W of Imola (69797 inhabitants)
59 Km S of Modena (184973 inhabitants)
60 Km NE of Lucca (89046 inhabitants)
62 Km W of Faenza (58541 inhabitants)
73 Km W of Forlì (117913 inhabitants)
74 Km SE of Reggio nell'Emilia (171345 inhabitants)
74 Km S of Carpi (70699 inhabitants)
75 Km NE of Pisa (89158 inhabitants)
77 Km E of Viareggio (62467 inhabitants)
80 Km E of Massa (69479 inhabitants)
83 Km E of Carrara (63133 inhabitants)
87 Km SW of Ferrara (133155 inhabitants)
89 Km W of Cesena (96758 inhabitants)
91 Km W of Ravenna (159116 inhabitants)
93 Km N of Siena (53903 inhabitants)
93 Km NE of Livorno (159219 inhabitants)
96 Km NW of Arezzo (99543 inhabitants)
98 Km SE of Parma (192836 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 		Md 1.6 2015-01-23
07:20:31		 44.1382 11.132 10 2015-10-19
09:26:59		 Bollettino Sismico Italiano INGV 21719721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-01-23 07:20:31 ± 0.14
Latitude 44.1382 ± 0.0081
Longitude 11.1320 ± 0.0138
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 21719721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1181
Semi-minor axis of confidence ellipse (meter) 788
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 115
Circular confidence region, given by single value of horizontal uncertainty (meter) 1180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.03058
Epicentral distance of station farthest from the epicenter (degree) 0.60344
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 9
Type of magnitude Md
Reference to an origin 21719721
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-10-06 13:30:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BDI.HHZ. 2015-01-23T07:20:46.19 0.6 undecidable manual S 259 43.5231 50 -0.09 48
IV.PII.HHZ. 2015-01-23T07:20:43.78 0.3 undecidable manual P 227 66.9774 50 -0.01 70
GU.POPM.HHZ. 2015-01-23T07:20:42.89 0.6 undecidable manual S 251 31.6461 50 -0.21 48
GU.MAIM.HHZ. 2015-01-23T07:20:42.12 0.3 undecidable manual P 244 56.7987 50 -0.11 70
IV.RUFI.EHE. 2015-01-23T07:20:40.42 0.3 undecidable manual P 138 44.9217 50 0.03 73
IV.PTF.SHZ. 2015-01-23T07:20:40.07 0.6 undecidable manual S 194 20.3685 115 0.42 47
IV.BDI.HHZ. 2015-01-23T07:20:39.97 0.3 undecidable manual P 259 43.5231 50 -0.21 70
IV.ZCCA.HHZ. 2015-01-23T07:20:38.09 0.1 positive manual P 332 26.6511 110 0.57 88
IV.MTCR.EHZ. 2015-01-23T07:20:38.74 0.3 undecidable manual S 220 15.9729 121 0.43 71
IV.MTRZ.HHZ. 2015-01-23T07:20:38.48 0.3 undecidable manual P 50 30.2475 50 0.34 70
GU.POPM.HHZ. 2015-01-23T07:20:38.20 0.1 undecidable manual P 251 31.6461 50 -0.14 97
IV.MTCR.EHZ. 2015-01-23T07:20:35.95 0.1 undecidable manual P 220 15.9729 121 0.37 95
IV.PTF.SHZ. 2015-01-23T07:20:35.75 0.1 undecidable manual P 194 20.3685 115 -0.6 88
IV.FNVD.HHZ. 2015-01-23T07:20:34.89 0.3 undecidable manual S 348 3.3966 161 -0.46 72
IV.FNVD.HHZ. 2015-01-23T07:20:33.63 0.1 undecidable manual P 348 3.3966 161 -0.24 100
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