Earthquake (controlled explosion) with magnitude of ML 1.6 on date 26-08-2017 and time 12:48:50 (Italy) in region Costa Toscana livornese (Livorno)

A magnitude ML 1.6 (controlled explosion) earthquake occured in region: Costa Toscana livornese (Livorno), on

  • 26-08-2017 10:48:50 (UTC)
  • 26-08-2017 12:48:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.33, 10.3 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: controlled explosion.

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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Rosignano Marittimo LI 16 31394 31394
Cecina LI 18 28046 59440

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km S of Livorno (159219 inhabitants)
44 Km S of Pisa (89158 inhabitants)
60 Km S of Lucca (89046 inhabitants)
60 Km S of Viareggio (62467 inhabitants)
80 Km S of Massa (69479 inhabitants)
83 Km W of Siena (53903 inhabitants)
84 Km SW of Pistoia (90315 inhabitants)
85 Km S of Carrara (63133 inhabitants)
86 Km SW of Scandicci (50609 inhabitants)
89 Km SW of Prato (191150 inhabitants)
91 Km NW of Grosseto (82087 inhabitants)
91 Km SW of Firenze (382808 inhabitants)
95 Km SE of La Spezia (93959 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
Rev 1000 ML 1.6 2017-08-26
10:48:50
43.33 10.3 0 2018-07-06
15:40:36
Bollettino Sismico Italiano INGV 53490351
Rev 100 ML 1.6 2017-08-26
10:48:51
43.32 10.28 9 2017-08-26
11:03:14
Sala Sismica INGV-Roma 49383481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-08-26 10:48:50 ± 0.07
Latitude 43.33 ± 0.00
Longitude 10.30 ± 0.01
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type controlled explosion
Origin ID 53490351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 630
Semi-minor axis of confidence ellipse (meter) 500
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.23207
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 53490351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-02-05 09:38:19

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 14
Type of magnitude ML
Reference to an origin 49383481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-08-26 11:03:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.CLTB.HHZ. 2017-08-26T10:50:40.97 3.0 positive manual Pg 18.98 0
IV.CRAC.EHZ. 2017-08-26T10:50:13.46 3.0 positive manual Pn 1.3 0
IV.VITU.HHZ. 2017-08-26T10:50:05.40 3.0 undecidable manual Pg 15.01 0
IV.TEOL.HHZ. 2017-08-26T10:50:00.11 3.0 undecidable manual Sn 2.29 0
IV.VIVA.HHZ. 2017-08-26T10:49:59.48 3.0 undecidable manual Sn -2.02 0
IV.CESX.HHZ. 2017-08-26T10:49:53.72 3.0 undecidable manual Sg 6.62 0
IV.T1299.EHZ. 2017-08-26T10:49:28.28 3.0 undecidable manual Pn -0.55 0
RD.PGF.BHN. 2017-08-26T10:49:13.73 0.3 undecidable manual P 231 1.2321 50 -0.55 57
TV.SF01.EHZ. 2017-08-26T10:49:11.45 0.3 undecidable manual P 119 1.054 50 0.2 65
IV.ARCI.HHZ. 2017-08-26T10:49:10.19 0.1 undecidable manual P 119 0.9785 50 0.24 87
IV.MOCL.EHZ. 2017-08-26T10:49:09.14 0.3 undecidable manual P 43 0.9272 50 0.06 68
GU.SARM.EHZ. 2017-08-26T10:49:07.76 0.3 undecidable manual P 5 0.8589 50 -0.14 68
GU.EQUI.HHZ. 2017-08-26T10:49:07.77 0.3 undecidable manual P 353 0.8445 50 0.1 69
IV.MTCR.EHZ. 2017-08-26T10:49:07.89 0.1 undecidable manual P 36 0.8633 50 -0.09 92
IV.PLMA.HHE. 2017-08-26T10:49:06.37 0.3 undecidable manual P 336 0.7914 50 -0.39 66
GU.POPM.HHZ. 2017-08-26T10:49:06.49 0.1 positive manual P 24 0.7887 50 -0.21 91
IV.OSSC.HNN. 2017-08-26T10:49:05.55 0.3 undecidable manual P 74 0.7114 50 0.17 70
IV.CSNT.HHE. 2017-08-26T10:49:05.94 0.3 undecidable manual P 78 0.7311 50 0.22 69
IV.CASP.HHZ. 2017-08-26T10:49:04.68 0.1 positive manual P 142 0.6754 50 -0.09 96
IV.RIBO.EHZ.01 2017-08-26T10:49:04.75 0.3 undecidable manual P 125 0.661 50 0.23 70
IV.CRMI.HHZ. 2017-08-26T10:49:04.68 0.1 positive manual P 46 0.6772 50 -0.12 95
IV.FROS.HHE. 2017-08-26T10:49:03.86 0.6 undecidable manual P 100 0.6313 50 -0.16 48
IV.CELB.HHE. 2017-08-26T10:49:03.22 0.3 undecidable manual P 187 0.5846 50 0 75
IV.TRIF.HHZ. 2017-08-26T10:49:00.95 0.1 undecidable manual P 116 0.4856 90 -0.24 97
IV.PII.HHZ. 2017-08-26T10:48:59.99 0.1 undecidable manual P 22 0.4254 90 0.14 100
IV.GROG.HHZ. 2017-08-26T10:48:57.83 0.1 positive manual P 288 0.3148 90 0.44 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GROG.HHN. ML:1.6 0.000176 0.4 AML other m 2017-08-26T10:49:04.68
IV.GROG.HHE. ML:1.7 0.000232 0.66 AML other m 2017-08-26T10:49:06.92
GU.POPM.HHE. ML:1.4 2.76E-5 1.14 AML other m 2017-08-26T10:49:08.93
IV.PII.HHN. ML:1.4 7.47E-5 0.32 AML other m 2017-08-26T10:49:09.35
IV.PII.HHE. ML:1.5 9.275E-5 0.78 AML other m 2017-08-26T10:49:09.43
GU.POPM.HHN. ML:1.5 3.48E-5 1.16 AML other m 2017-08-26T10:49:09.83
IV.ARCI.HHE. ML:1.5 2.545E-5 0.86 AML other m 2017-08-26T10:49:12.29
IV.CASP.HHN. ML:1.7 8.115E-5 1.06 AML other m 2017-08-26T10:49:17.80
IV.CASP.HHE. ML:1.6 6.335E-5 1.06 AML other m 2017-08-26T10:49:18.07
IV.TRIF.HHE. ML:1.7 0.0001075 0.58 AML other m 2017-08-26T10:49:18.90
IV.TRIF.HHN. ML:1.5 7.375E-5 1.32 AML other m 2017-08-26T10:49:19.32
IV.CRE.HHN. ML:0 3.855E-5 0.06 AML other m 2017-08-26T10:49:33.10
IV.CRE.HHE. ML:0 3.715E-5 0.06 AML other m 2017-08-26T10:49:33.16
IV.ARCI.HHN. ML:1.7 3.76E-5 0.84 AML other m 2017-08-26T10:49:35.99
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download