Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 14-02-2019 and time 15:33:48 (Italy) in region 4 km W Arcidosso (GR)

A magnitude ML 1.8 earthquake occured in region: 4 km W Arcidosso (GR), on

  • 14-02-2019 14:33:48 (UTC)
  • 14-02-2019 15:33:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8710, 11.4920 at 8 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
Arcidosso GR 4 4285 4285
Castel del Piano GR 5 4690 8975
Cinigiano GR 8 2618 11593
Seggiano GR 8 961 12554
Santa Fiora GR 9 2622 15176
Roccalbegna GR 10 1044 16220
Abbadia San Salvatore SI 15 6444 22664
Semproniano GR 16 1059 23723
Piancastagnaio SI 17 4230 27953
Campagnatico GR 18 2412 30365
Castiglione d'Orcia SI 18 2346 32711
Castell'Azzara GR 20 1476 34187

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Grosseto (82087 inhabitants)
52 Km S of Siena (53903 inhabitants)
71 Km NW of Viterbo (67173 inhabitants)
74 Km SW of Arezzo (99543 inhabitants)
78 Km W of Perugia (166134 inhabitants)
90 Km N of Civitavecchia (52991 inhabitants)
99 Km W of Foligno (57155 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 2019-02-14
14:33:48		 42.8712 11.4922 8 2019-08-22
08:25:14		 Bollettino Sismico Italiano INGV 71272681
Reviewed
Rev100 		ML 1.6 2019-02-14
14:33:48		 42.8713 11.5035 8 2019-02-14
15:16:36		 Sala Sismica INGV-Roma 65540901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-14 14:33:48 ± 0.11
Latitude 42.8712 ± 0.0117
Longitude 11.4922 ± 0.0110
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 71272681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1144
Semi-minor axis of confidence ellipse (meter) 1018
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 152
Circular confidence region, given by single value of horizontal uncertainty (meter) 1140.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.57377
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 65540901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-14 15:16:36

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 71272681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-08-10 06:53:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CDRU.HHZ. 2019-02-14T14:35:44.80 3.0 undecidable manual Sg 9.63 0
IT.SLC1.HGZ. 2019-02-14T14:35:38.42 3.0 undecidable manual Sn -2.39 0
IV.MTGR.HHZ. 2019-02-14T14:35:19.45 3.0 negative manual Pg 12.18 0
IV.IOCA.HHZ. 2019-02-14T14:35:16.96 3.0 undecidable manual Sg 4.6 0
IV.AIO.HHZ. 2019-02-14T14:35:11.24 3.0 undecidable manual Pn -4.39 0
IV.VENL.HNZ. 2019-02-14T14:35:09.92 3.0 undecidable manual Sg 3.41 0
IV.VITU.HHZ. 2019-02-14T14:35:08.68 3.0 undecidable manual Sn -6.09 0
IT.SLC1.HGZ. 2019-02-14T14:35:03.35 3.0 undecidable manual Pg 11.3 0
IV.PTRJ.HHZ. 2019-02-14T14:34:40.74 3.0 undecidable manual Pg 5.63 0
IV.BRSN.EHZ. 2019-02-14T14:34:32.09 3.0 undecidable manual S -6.45 0
IT.VNF1.HGZ. 2019-02-14T14:34:32.97 3.0 undecidable manual Pg 2.8 0
IV.MSSA.HHZ. 2019-02-14T14:34:23.54 3.0 undecidable manual Pn -0.85 0
IV.TRIF.CHZ. 2019-02-14T14:34:05.46 0.6 undecidable manual S 300 54.9006 50 -0.63 41
IV.RIBO.EHZ.01 2019-02-14T14:34:00.43 0.3 undecidable manual S 284 37.2294 50 -0.94 55
IV.CAFI.HHZ. 2019-02-14T14:33:59.61 0.1 undecidable manual P 37 63.6918 50 -0.27 88
IV.MGAB.HHZ. 2019-02-14T14:33:58.00 0.3 undecidable manual P 85 50.616 50 0.14 70
IV.CASP.HHZ. 2019-02-14T14:33:58.09 0.1 undecidable manual P 260 51.8037 50 0.05 95
IV.TRIF.CHZ. 2019-02-14T14:33:58.82 0.3 undecidable manual P 300 54.9006 50 0.29 67
IV.FROS.CHZ. 2019-02-14T14:33:57.38 0.3 undecidable manual P 324 46.4202 50 0.16 70
IV.RIBO.EHZ.01 2019-02-14T14:33:56.00 0.1 undecidable manual P 284 37.2294 50 0.2 94
IV.LATE.HHZ. 2019-02-14T14:33:56.63 0.3 undecidable manual P 138 38.2284 50 0.67 62
TV.SF03.EHN. 2019-02-14T14:33:54.47 0.1 undecidable manual S 116 17.4714 113 -0.34 95
IV.MCIV.CHZ. 2019-02-14T14:33:54.59 0.3 undecidable manual S 124 18.1707 113 -0.44 69
TV.SF11.HHZ. 2019-02-14T14:33:54.02 0.6 undecidable manual S 91 15.1737 117 -0.07 50
TV.SF04.EHZ. 2019-02-14T14:33:53.46 0.1 undecidable manual S 106 14.2746 118 -0.34 95
TV.SF14.HHN. 2019-02-14T14:33:53.87 0.6 undecidable manual S 142 16.2726 115 -0.56 45
TV.SF03.EHN. 2019-02-14T14:33:52.21 0.1 undecidable manual P 116 17.4714 113 0.2 97
TV.SF13.HHN. 2019-02-14T14:33:52.97 0.1 undecidable manual S 119 11.877 123 -0.13 100
IV.MCIV.CHZ. 2019-02-14T14:33:52.40 0.1 undecidable manual P 124 18.1707 113 0.25 96
TV.SF01.EHZ. 2019-02-14T14:33:52.21 0.6 undecidable manual S 139 8.7801 131 -0.01 51
TV.SF13.HHN. 2019-02-14T14:33:51.41 0.1 undecidable manual P 119 11.877 123 0.38 95
TV.SF11.HHZ. 2019-02-14T14:33:51.75 0.1 undecidable manual P 91 15.1737 117 0.15 99
TV.SF04.EHZ. 2019-02-14T14:33:51.65 0.1 undecidable manual P 106 14.2746 118 0.22 98
TV.SF14.HHN. 2019-02-14T14:33:51.72 0.1 undecidable manual P 142 16.2726 115 -0.08 100
TV.SF01.EHZ. 2019-02-14T14:33:50.81 0.1 undecidable manual P 139 8.7801 131 0.29 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF01.EHE. ML:2.0 0.001645 0.2 AML other m 2019-02-14T14:33:52.36
TV.SF01.EHN. ML:2.0 0.0016500000000000002 0.46 AML other m 2019-02-14T14:33:52.36
TV.SF04.EHE. ML:2.5 0.0038250000000000003 0.22 AML other m 2019-02-14T14:33:54.31
TV.SF04.EHN. ML:2.4 0.002745 0.56 AML other m 2019-02-14T14:33:55.48
IV.MCIV.CHE. ML:1.9 0.0007915 1 AML other m 2019-02-14T14:33:55.96
IV.MCIV.CHN. ML:2.0 0.000985 0.24 AML other m 2019-02-14T14:33:55.59
IV.LATE.HHE. ML:1.6 0.0001565 1.8 AML other m 2019-02-14T14:34:03.98
IV.LATE.HHN. ML:1.7 0.00017999999999999998 0.3 AML other m 2019-02-14T14:34:04.63
IV.TRIF.CHE. ML:1.6 0.00010290000000000001 0.14 AML other m 2019-02-14T14:34:06.24
IV.CASP.HHN. ML:1.3 0.0000563 0.66 AML other m 2019-02-14T14:34:06.74
IV.CASP.HHE. ML:1.4 0.0000593 0.68 AML other m 2019-02-14T14:34:06.91
IV.TRIF.CHN. ML:1.6 0.00008599999999999999 0.14 AML other m 2019-02-14T14:34:07.14
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