Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 01-03-2013 and time 16:29:25 (UTC) in region 3 km NW Firenzuola (FI)

A magnitude ML 1.6 earthquake occured in region: 3 km NW Firenzuola (FI), on

  • 01-03-2013 16:29:25 (UTC)
  • 01-03-2013 17:29:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1430, 11.3580 at 22 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
Firenzuola FI 3 4726 4726
Monghidoro BO 9 3749 8475
San Benedetto Val di Sambro BO 13 4315 12790
Castel del Rio BO 14 1246 14036
Loiano BO 15 4294 18330
Palazzuolo sul Senio FI 16 1154 19484
Castiglione dei Pepoli BO 16 5648 25132
Monzuno BO 17 6328 31460
Barberino di Mugello FI 18 10836 42296
Vernio PO 19 6060 48356

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NE of Prato (191150 inhabitants)
37 Km SW of Imola (69797 inhabitants)
39 Km S of Bologna (386663 inhabitants)
42 Km NE of Pistoia (90315 inhabitants)
42 Km N of Firenze (382808 inhabitants)
45 Km W of Faenza (58541 inhabitants)
45 Km NE of Scandicci (50609 inhabitants)
55 Km W of Forlì (117913 inhabitants)
66 Km SE of Modena (184973 inhabitants)
71 Km W of Cesena (96758 inhabitants)
74 Km W of Ravenna (159116 inhabitants)
76 Km E of Lucca (89046 inhabitants)
80 Km S of Ferrara (133155 inhabitants)
81 Km SE of Carpi (70699 inhabitants)
85 Km SE of Reggio nell'Emilia (171345 inhabitants)
86 Km NW of Arezzo (99543 inhabitants)
90 Km NE of Pisa (89158 inhabitants)
92 Km N of Siena (53903 inhabitants)
94 Km E of Viareggio (62467 inhabitants)
97 Km W of Rimini (147750 inhabitants)
98 Km E of Massa (69479 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 2013-03-01
16:29:25		 44.1427 11.358 22 2015-01-20
11:23:56		 Bollettino Sismico Italiano INGV 5189911
Reviewed
Rev100 		ML 1.6 2013-03-01
16:29:25		 44.1427 11.358 22 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 3008791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-03-01 16:29:25 ± 0.4
Latitude 44.1427 ± 0.0072
Longitude 11.3580 ± 0.0564
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 5189911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4451
Semi-minor axis of confidence ellipse (meter) 430
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 269
Circular confidence region, given by single value of horizontal uncertainty (meter) 4450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 196
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.08813
Epicentral distance of station farthest from the epicenter (degree) 0.46405
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:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 5189911
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:26:46

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 3008791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-03-01 17:31:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2013-03-01T16:29:41.68 0.1 undecidable manual S 138 51.5151 106 -0.03 93
IV.RUFI.EHZ. 2013-03-01T16:29:38.02 0.1 undecidable manual S 160 35.9418 114 0.26 91
IV.ASQU.HHZ. 2013-03-01T16:29:34.35 0.1 undecidable manual P 138 51.5151 106 -0.33 87
IV.MTRZ.HHZ. 2013-03-01T16:29:34.32 0.1 undecidable manual S 16 19.5693 133 0.23 94
IV.RUFI.EHZ. 2013-03-01T16:29:32.69 0.1 undecidable manual P 160 35.9418 114 0.29 91
IV.SEI.HHZ. 2013-03-01T16:29:32.29 0.1 undecidable manual S 180 9.7791 153 -0.2 98
IV.MTRZ.HHZ. 2013-03-01T16:29:30.11 0.1 undecidable manual P 16 19.5693 133 -0.17 95
IV.SEI.HHZ. 2013-03-01T16:29:29.37 0.1 positive manual P 180 9.7791 153 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRZ.HHN. ML:1.5 0.00018099999999999998 0.5 AML other m 2013-03-01T16:29:34.51
IV.MTRZ.HHE. ML:1.5 0.0001565 0.34 AML other m 2013-03-01T16:29:35.91
IV.MTRZ.HNE. ML:1.5 0.000167 0.38 AML other m 2013-03-01T16:29:35.91
IV.MTRZ.HNN. ML:1.5 0.000175 0.24 AML other m 2013-03-01T16:29:36.13
IV.SEI.HHN. ML:2.1 0.0008414999999999999 0.26 AML other m 2013-03-01T16:29:32.62
IV.SEI.HHE. ML:1.6 0.00027649999999999994 1.54 AML other m 2013-03-01T16:29:32.85
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