Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (controlled explosion) with magnitude of ML 1.8 on date 08-11-2018 and time 11:46:25 (UTC) in region Isola Elba (Livorno)

A magnitude ML 1.8 (controlled explosion) earthquake occured in region: Isola Elba (Livorno), on

  • 08-11-2018 11:46:25 (UTC)
  • 08-11-2018 12:46:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7620, 10.4620 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.

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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
Porto Azzurro LI 5 3751 3751
Rio Marina LI 7 2198 5949
Capoliveri LI 7 4033 9982
Rio nell'Elba LI 8 1148 11130
Portoferraio LI 12 11992 23122
Piombino LI 19 34060 57182
Campo nell'Elba LI 19 4805 61987

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km W of Grosseto (82087 inhabitants)
89 Km S of Livorno (159219 inhabitants)
94 Km SW of Siena (53903 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 1.8 2018-11-08
11:46:25		 42.7617 10.4622 0 2019-06-04
09:16:07		 Bollettino Sismico Italiano INGV 64851631
Reviewed
Rev100 		ML 1.7 2018-11-08
11:46:27		 42.7563 10.5018 10 2018-11-08
11:56:17		 Sala Sismica INGV-Roma 62896661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-11-08 11:46:25 ± 0.14
Latitude 42.7617 ± 0.0099
Longitude 10.4622 ± 0.0110
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 64851631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1060
Semi-minor axis of confidence ellipse (meter) 900
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
Circular confidence region, given by single value of horizontal uncertainty (meter) 1060.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.29678
Epicentral distance of station farthest from the epicenter (degree) 1.09627
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 64851631
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-05-13 09:42:30

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 62896661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-11-08 11:56:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
RD.PGF.BHZ. 2018-11-08T11:46:47.55 0.1 undecidable manual P 259 121.6893 50 -0.01 85
IV.CSNT.HHZ. 2018-11-08T11:46:45.30 0.6 undecidable manual P 40 103.5186 50 0.53 39
TV.SF04.EHZ. 2018-11-08T11:46:44.17 0.1 undecidable manual P 85 97.8243 50 0.28 85
IV.MCIV.HHN. 2018-11-08T11:46:44.21 0.1 undecidable manual P 88 98.9232 50 0.16 87
TV.SF13.HHN. 2018-11-08T11:46:43.40 0.1 undecidable manual P 86 94.4388 50 0.04 90
TV.SF01.EHN. 2018-11-08T11:46:42.66 0.3 undecidable manual P 86 89.8434 50 0.01 68
IV.ARCI.HHZ. 2018-11-08T11:46:41.45 0.1 undecidable manual P 83 83.0502 50 -0.16 89
IV.FROS.HHZ. 2018-11-08T11:46:40.75 0.1 undecidable manual P 48 75.0693 50 0.36 87
IV.MAON.HHZ. 2018-11-08T11:46:38.70 0.1 undecidable manual P 124 65.9895 50 -0.28 90
IV.MAGO.HHZ. 2018-11-08T11:46:37.71 0.1 undecidable manual P 16 58.8966 90 -0.08 95
IV.TRIF.HHE. 2018-11-08T11:46:36.04 0.3 undecidable manual P 42 53.0025 90 -0.58 64
IV.RIBO.EHZ.01 2018-11-08T11:46:36.17 0.3 undecidable manual P 66 51.8037 90 -0.21 70
IV.CASP.HHZ. 2018-11-08T11:46:32.66 0.1 positive manual P 84 32.9448 90 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CASP.HHE. ML:1.4 0.0001193255 0.4992 AML other m 2018-11-08T11:46:45.78
IV.CASP.HHN. ML:1.5 0.00014550849999999998 0.3392 AML other m 2018-11-08T11:46:38.08
IV.RIBO.EHE.01 ML:2.0 0.00022582055 0.736 AML other m 2018-11-08T11:46:55.80
IV.MAGO.HHN. ML:2.0 0.00020696235000000003 0.1088 AML other m 2018-11-08T11:46:48.46
IV.MAGO.HHE. ML:1.8 0.00013202245000000002 0.192 AML other m 2018-11-08T11:46:49.30
IV.MAON.HHE. ML:1.8 0.000130880685 0.3776 AML other m 2018-11-08T11:46:49.01
IV.MAON.HHN. ML:1.8 0.00011579985 0.2368 AML other m 2018-11-08T11:46:49.10
IV.ARCI.HHN. ML:1.8 0.000073053705 0.4608 AML other m 2018-11-08T11:46:55.18
IV.ARCI.HHE. ML:1.6 0.000057378590000000006 0.2752 AML other m 2018-11-08T11:46:57.00
TV.SF04.EHE. ML:2.1 0.000122358165 0.2432 AML other m 2018-11-08T11:46:46.35
TV.SF04.EHN. ML:1.9 0.00008610435 0.2624 AML other m 2018-11-08T11:46:59.78
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