INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.6 on date 14-02-2019 and time 15:33:48 (Italy) in region 3 km W Arcidosso (GR)

A magnitude ML 1.6 earthquake occured in region: 3 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) 42.87, 11.5 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Arcidosso GR 3 4285 4285
Castel del Piano GR 4 4690 8975
Seggiano GR 8 961 9936
Santa Fiora GR 8 2622 12558
Cinigiano GR 9 2618 15176
Roccalbegna GR 10 1044 16220
Abbadia San Salvatore SI 14 6444 22664
Piancastagnaio SI 16 4230 26894
Semproniano GR 16 1059 27953
Castiglione d'Orcia SI 18 2346 30299
Campagnatico GR 19 2412 32711
Castell'Azzara GR 19 1476 34187

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Grosseto (82087 inhabitants)
52 Km S of Siena (53903 inhabitants)
70 Km NW of Viterbo (67173 inhabitants)
73 Km SW of Arezzo (99543 inhabitants)
77 Km W of Perugia (166134 inhabitants)
90 Km N of Civitavecchia (52991 inhabitants)
98 Km W of Foligno (57155 inhabitants)
100 Km W of Terni (111501 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.6 2019-02-14
14:33:48
42.87 11.5 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 ± 0.15
Latitude 42.87 ± 0.01
Longitude 11.50 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 65540901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1198
Semi-minor axis of confidence ellipse (meter) 997
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 172
Circular confidence region, given by single value of horizontal uncertainty (meter) 1200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.56837
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 10
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance 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
IT.VNF1.HGZ. 2019-02-14T14:34:32.97 3.0 undecidable manual Pg 2.8 0
IV.BRSN.EHZ. 2019-02-14T14:34:32.09 3.0 undecidable manual S -6.45 0
IV.MSSA.HHZ. 2019-02-14T14:34:23.54 3.0 undecidable manual Pn -0.85 0
IV.CAFI.HHZ. 2019-02-14T14:34:08.35 0.3 undecidable manual S 36 0.5684 50 0.05 69
IV.CASP.HHZ. 2019-02-14T14:34:06.18 0.3 undecidable manual S 260 0.4748 50 0.66 60
IV.TRIF.CHZ. 2019-02-14T14:34:05.82 0.3 undecidable manual S 299 0.5018 50 -0.51 63
IV.LATE.HHZ. 2019-02-14T14:34:01.11 0.3 undecidable manual S 139 0.339 50 -0.39 67
IV.RIBO.EHZ.01 2019-02-14T14:34:00.59 0.3 undecidable manual S 283 0.3435 50 -1.04 52
IV.CAFI.HHZ. 2019-02-14T14:33:59.67 0.6 negative manual P 36 0.5684 50 -0.21 44
IV.TRIF.CHZ. 2019-02-14T14:33:59.22 0.3 positive manual P 299 0.5018 50 0.47 64
IV.CASP.HHZ. 2019-02-14T14:33:58.17 0.6 undecidable manual P 260 0.4748 50 -0.11 46
IV.MGAB.HHZ. 2019-02-14T14:33:58.06 0.6 negative manual P 85 0.4479 50 0.25 45
IV.LATE.HHZ. 2019-02-14T14:33:57.64 0.6 negative manual P 139 0.339 50 1.68 24
IV.FROS.CHZ. 2019-02-14T14:33:57.71 0.6 positive manual P 323 0.4227 50 0.32 45
IV.RIBO.EHZ.01 2019-02-14T14:33:56.01 1.0 undecidable manual P 283 0.3435 50 -0.02 24
IV.MCIV.CHZ. 2019-02-14T14:33:54.63 0.3 undecidable manual S 126 0.1574 115 -0.45 68
TV.SF04.EHZ. 2019-02-14T14:33:53.47 0.6 undecidable manual S 107 0.1205 122 -0.37 47
IV.MCIV.CHZ. 2019-02-14T14:33:52.50 0.1 positive manual P 126 0.1574 115 0.25 95
TV.SF01.EHZ. 2019-02-14T14:33:52.23 0.6 undecidable manual S 144 0.0737 135 -0.2 49
TV.SF04.EHZ. 2019-02-14T14:33:51.69 0.1 undecidable manual P 107 0.1205 122 0.16 98
TV.SF01.EHZ. 2019-02-14T14:33:50.81 0.1 positive manual P 144 0.0737 135 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF01.EHN. ML:2 0.00165 0.46 AML other m 2019-02-14T14:33:52.36
TV.SF01.EHE. ML:2 0.001645 0.2 AML other m 2019-02-14T14:33:52.36
TV.SF04.EHE. ML:2.5 0.003825 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 0.000985 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 0.00018 0.3 AML other m 2019-02-14T14:34:04.63
IV.TRIF.CHE. ML:1.7 0.0001029 0.14 AML other m 2019-02-14T14:34:06.24
IV.CASP.HHN. ML:1.4 5.63E-5 0.66 AML other m 2019-02-14T14:34:06.74
IV.CASP.HHE. ML:1.4 5.93E-5 0.68 AML other m 2019-02-14T14:34:06.91
IV.TRIF.CHN. ML:1.6 8.6E-5 0.14 AML other m 2019-02-14T14:34:07.14
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