Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 16-08-2006 and time 18:13:10 (UTC) in region 6 km SE Viareggio (LU)

A magnitude ML 1.7 earthquake occured in region: 6 km SE Viareggio (LU), on

  • 16-08-2006 18:13:10 (UTC)
  • 16-08-2006 20:13:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8200, 10.2920 at 3 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
Viareggio LU 6 62467 62467
Massarosa LU 7 22471 84938
Vecchiano PI 9 12189 97127
Camaiore LU 13 32513 129640
San Giuliano Terme PI 14 31399 161039
Pisa PI 15 89158 250197
Pietrasanta LU 16 24007 274204
Lucca LU 17 89046 363250
Forte dei Marmi LU 19 7510 370760
Pescaglia LU 19 3526 374286
Stazzema LU 20 3193 377479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km SE of Viareggio (62467 inhabitants)
15 Km NW of Pisa (89158 inhabitants)
17 Km W of Lucca (89046 inhabitants)
27 Km SE of Massa (69479 inhabitants)
30 Km N of Livorno (159219 inhabitants)
33 Km SE of Carrara (63133 inhabitants)
49 Km SE of La Spezia (93959 inhabitants)
52 Km W of Pistoia (90315 inhabitants)
65 Km W of Prato (191150 inhabitants)
72 Km W of Scandicci (50609 inhabitants)
78 Km W of Firenze (382808 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 2.2
ML 1.7 		2006-08-16
18:13:10		 43.82 10.292 3 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 586749
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2006-08-16 18:13:10 ± 0.51
Latitude 43.8200 ± 0.0171
Longitude 10.2920 ± 0.0337
Depth (km) 3 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 586749

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2531
Semi-minor axis of confidence ellipse (meter) 2392
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 337
Circular confidence region, given by single value of horizontal uncertainty (meter) 3301.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 208
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.84
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.12325
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 586749
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 11:13:58

Md:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 586749
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 11:13:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ORI.EHE. 2006-08-16T18:14:08.56 10.0 undecidable manual Pg 0 0 0
IV.SEST.EHE. 2006-08-16T18:13:37.68 10.0 undecidable manual Pg 0 0 0
IV.FNVD.HHN. 2006-08-16T18:13:36.22 10.0 undecidable manual Pg 0 0 0
IV.BOB.SHZ. 2006-08-16T18:13:32.98 0.1 undecidable manual Pg 328 124.6863 0.66 72
IV.GSCL.SHZ. 2006-08-16T18:13:31.75 0.1 undecidable manual Sg 22 63.3921 -0.072 48
IV.PZZT.HHE. 2006-08-16T18:13:29.59 0.1 undecidable manual Sg 53 57.0984 -0.548 43
IV.SEI.SHZ. 2006-08-16T18:13:28.27 0.1 undecidable manual Pg 73 89.0442 1.448 53
IV.ZCCA.SHZ. 2006-08-16T18:13:27.15 0.1 undecidable manual Pg 43 80.2641 1.679 47
IV.CSNT.SHZ. 2006-08-16T18:13:26.14 0.1 undecidable manual Pg 115 88.8444 -0.654 78
IV.BDI.HHZ. 2006-08-16T18:13:23.44 0.1 undecidable manual Sg 42 36.3414 0.156 49
IV.ERBM.EHZ. 2006-08-16T18:13:23.02 0.1 undecidable manual Pg 8 67.1772 -0.431 88
IV.GSCL.SHZ. 2006-08-16T18:13:22.47 0.1 undecidable manual Pg 22 63.3921 -0.402 89
IV.PZZT.HHE. 2006-08-16T18:13:21.53 0.1 undecidable manual Pg 53 57.0984 -0.368 90
IV.PII.SHZ. 2006-08-16T18:13:18.46 0.1 undecidable manual Sg 120 21.5673 0.254 49
IV.BDI.HHZ. 2006-08-16T18:13:18.19 0.1 undecidable manual Pg 42 36.3414 0.249 96
MN.VLC.HHZ. 2006-08-16T18:13:17.86 0.1 undecidable manual Pg 11 38.4282 -0.495 91
IV.PII.SHZ. 2006-08-16T18:13:14.81 0.1 undecidable manual Pg 120 21.5673 -0.196 100
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