Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 26-06-2018 and time 11:14:19 (UTC) in region 1 km W Piancastagnaio (SI)

A magnitude ML 2.1 earthquake occured in region: 1 km W Piancastagnaio (SI), on

  • 26-06-2018 11:14:19 (UTC)
  • 26-06-2018 13:14:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8470, 11.6850 at 7 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
Piancastagnaio SI 1 4230 4230
Abbadia San Salvatore SI 4 6444 10674
Santa Fiora GR 8 2622 13296
Castell'Azzara GR 8 1476 14772
Radicofani SI 9 1097 15869
Arcidosso GR 12 4285 20154
Castel del Piano GR 13 4690 24844
Seggiano GR 14 961 25805
Proceno VT 16 557 26362
Roccalbegna GR 16 1044 27406
San Casciano dei Bagni SI 16 1632 29038
Semproniano GR 17 1059 30097
Castiglione d'Orcia SI 18 2346 32443
Sorano GR 19 3428 35871
Acquapendente VT 19 5506 41377

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km E of Grosseto (82087 inhabitants)
59 Km NW of Viterbo (67173 inhabitants)
60 Km SE of Siena (53903 inhabitants)
64 Km W of Perugia (166134 inhabitants)
71 Km S of Arezzo (99543 inhabitants)
84 Km W of Foligno (57155 inhabitants)
84 Km N of Civitavecchia (52991 inhabitants)
85 Km W of Terni (111501 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 2.1 2018-06-26
11:14:19		 42.8473 11.6847 7 2019-04-24
14:50:51		 Bollettino Sismico Italiano INGV 59515041
Reviewed
Rev100 		ML 2.1 2018-06-26
11:14:19		 42.8502 11.6847 7 2018-06-26
11:27:04		 Sala Sismica INGV-Roma 58152181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-06-26 11:14:19 ± 0.06
Latitude 42.8473 ± 0.0054
Longitude 11.6847 ± 0.0049
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 59515041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 549
Semi-minor axis of confidence ellipse (meter) 392
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 169
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 40
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.89662
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 25
Type of magnitude ML
Reference to an origin 59515041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-08-08 12:46:38

ML:2.1

Field Value
Value 2.1
Uncertainty 0.5
Num. used stations 33
Type of magnitude ML
Reference to an origin 58152181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-06-26 11:27:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HNZ. 2018-06-26T11:14:45.15 3.0 undecidable manual P 0.17 0
IV.CSNT.HHZ. 2018-06-26T11:14:43.20 0.6 undecidable manual S 335 76.368 50 -0.18 44
IV.ATMI.HHE. 2018-06-26T11:14:42.90 0.6 undecidable manual S 41 71.7726 50 0.76 37
IV.MAON.HHZ. 2018-06-26T11:14:41.10 0.6 undecidable manual S 224 64.7907 50 0.82 37
IV.SRES.HHZ. 2018-06-26T11:14:38.63 3.0 positive manual P 1.66 0
IV.FROS.HHZ. 2018-06-26T11:14:38.60 0.3 undecidable manual S 313 58.7967 50 -0.06 69
IV.PARC.HHZ. 2018-06-26T11:14:37.31 0.6 undecidable manual P 27 99.5226 50 0.38 40
IV.RIBO.EHZ. 2018-06-26T11:14:35.80 0.3 undecidable manual S 282 53.1024 50 -1.35 43
IV.CRE.HHE. 2018-06-26T11:14:35.76 0.1 undecidable manual P 14 88.245 50 0.57 77
IV.BADI.EHE. 2018-06-26T11:14:34.79 0.1 undecidable manual P 31 86.3469 50 -0.1 87
IV.MURB.HHZ. 2018-06-26T11:14:34.32 0.3 undecidable manual P 56 82.251 50 0.06 66
IV.ATMI.HHE. 2018-06-26T11:14:33.07 0.1 undecidable manual P 41 71.7726 50 0.43 83
IV.CSNT.HHZ. 2018-06-26T11:14:33.15 0.3 positive manual P 335 76.368 50 -0.21 65
IV.MAON.HHZ. 2018-06-26T11:14:31.54 0.1 positive manual P 224 64.7907 50 -0.04 92
IV.ATTE.HHN. 2018-06-26T11:14:31.41 0.3 undecidable manual P 54 66.7776 50 -0.46 63
IV.CASP.HHZ. 2018-06-26T11:14:31.92 0.3 undecidable manual P 265 66.9774 50 0.02 69
IV.MGAB.HHZ. 2018-06-26T11:14:31.70 0.6 undecidable manual S 78 35.5422 102 -0.56 43
IV.ATVA.EHE. 2018-06-26T11:14:31.61 0.3 undecidable manual P 45 68.2761 50 -0.5 62
IV.CAFI.HHZ. 2018-06-26T11:14:30.12 0.3 undecidable manual P 23 58.0974 50 -0.42 64
IV.FROS.HHZ. 2018-06-26T11:14:30.70 0.3 negative manual P 313 58.7967 50 0.06 69
IV.LATE.HHZ. 2018-06-26T11:14:29.40 0.6 undecidable manual S 159 27.6501 105 -0.21 47
IV.RIBO.EHZ. 2018-06-26T11:14:29.84 0.3 undecidable manual P 282 53.1024 50 0.08 70
IV.ARCI.HHZ. 2018-06-26T11:14:26.20 0.3 undecidable manual S 272 17.0718 113 0.1 74
IV.MGAB.HHZ. 2018-06-26T11:14:26.44 0.3 undecidable manual P 78 35.5422 102 -0.5 66
IV.SACS.HHZ. 2018-06-26T11:14:26.80 0.6 undecidable manual S 89 18.2706 112 0.29 47
IV.LATE.HHZ. 2018-06-26T11:14:25.56 0.3 positive manual P 159 27.6501 105 0.14 72
TV.SF14.HHN. 2018-06-26T11:14:24.00 0.3 undecidable manual S 209 11.6772 122 -0.46 69
TV.SF01.EHZ. 2018-06-26T11:14:24.20 0.6 undecidable manual S 248 10.5783 124 0.05 50
TV.SF13.HHN. 2018-06-26T11:14:23.00 0.3 undecidable manual S 239 6.1938 140 0 77
IV.SACS.HHZ. 2018-06-26T11:14:23.82 0.1 positive manual P 89 18.2706 112 0.19 97
IV.ARCI.HHZ. 2018-06-26T11:14:23.64 0.1 undecidable manual P 272 17.0718 113 0.25 96
IV.MCIV.HHZ. 2018-06-26T11:14:23.20 0.6 undecidable manual S 185 7.6812 134 -0.14 50
TV.SF01.EHZ. 2018-06-26T11:14:22.56 0.6 undecidable manual P 248 10.5783 124 0.3 48
TV.SF04.EHZ. 2018-06-26T11:14:22.10 0.6 undecidable manual S 237 2.3976 162 -0.23 49
TV.SF14.HHN. 2018-06-26T11:14:22.27 0.1 undecidable manual P 209 11.6772 122 -0.17 98
TV.SF03.EHN. 2018-06-26T11:14:22.60 0.3 undecidable manual S 179 4.995 146 -0.13 75
TV.SF11.HHZ. 2018-06-26T11:14:22.00 0.3 undecidable manual S 349 2.3976 162 -0.34 72
TV.SF11.HHZ. 2018-06-26T11:14:21.37 0.1 undecidable manual P 349 2.3976 162 0.16 100
TV.SF13.HHN. 2018-06-26T11:14:21.94 0.1 undecidable manual P 239 6.1938 140 0.35 95
IV.MCIV.HHZ. 2018-06-26T11:14:21.98 1.0 undecidable manual P 185 7.6812 134 0.19 25
TV.SF04.EHZ. 2018-06-26T11:14:21.40 0.1 undecidable manual P 237 2.3976 162 0.19 99
TV.SF03.EHN. 2018-06-26T11:14:21.68 0.1 undecidable manual P 179 4.995 146 0.24 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MURB.HHE. ML:0.0 0.00026847395000000003 0.2624 AML other m 2018-06-26T11:14:49.72
IV.MCIV.HHE. ML:0.0 0.008499919 0.224 AML other m 2018-06-26T11:14:23.37
IV.MCIV.HHN. ML:0.0 0.0077794105 0.1472 AML other m 2018-06-26T11:14:23.58
TV.SF01.EHE. ML:0.0 0.0069638805 0.2432 AML other m 2018-06-26T11:14:24.34
TV.SF01.EHN. ML:0.0 0.0055739385 0.32 AML other m 2018-06-26T11:14:24.78
IV.SACS.HNN. ML:0.0 0.0008727406 0.1984 AML other m 2018-06-26T11:14:27.24
IV.SACS.HNE. ML:0.0 0.0010146124000000002 1.776 AML other m 2018-06-26T11:14:27.02
IV.SACS.HHE. ML:0.0 0.0009760288 1.776 AML other m 2018-06-26T11:14:27.02
IV.SACS.HHN. ML:0.0 0.0008467545999999999 0.1984 AML other m 2018-06-26T11:14:27.24
IV.LATE.HHE. ML:0.0 0.0021280665000000002 0.16 AML other m 2018-06-26T11:14:30.41
IV.LATE.HHN. ML:0.0 0.0022005055000000003 1.744 AML other m 2018-06-26T11:14:31.89
IV.MGAB.HHN. ML:0.0 0.00041408785 0.1984 AML other m 2018-06-26T11:14:33.98
IV.MGAB.HNN. ML:0.0 0.00037798840000000003 0.1984 AML other m 2018-06-26T11:14:33.88
IV.MGAB.HHE. ML:0.0 0.00040815335 0.2816 AML other m 2018-06-26T11:14:34.10
IV.MGAB.HNE. ML:0.0 0.00032430610000000004 0.2816 AML other m 2018-06-26T11:14:34.24
IV.FROS.HHE. ML:0.0 0.00017116090000000002 0.352 AML other m 2018-06-26T11:14:42.22
IV.FROS.HHN. ML:0.0 0.000125654865 0.416 AML other m 2018-06-26T11:14:42.37
IV.MAON.HHE. ML:0.0 0.000092659745 0.3584 AML other m 2018-06-26T11:14:44.54
IV.CSNT.HHN. ML:0.0 0.00003548698 0.2752 AML other m 2018-06-26T11:14:46.70
IV.CSNT.HHE. ML:0.0 0.000028023794999999997 0.4608 AML other m 2018-06-26T11:14:48.50
IV.MURB.HNN. ML:0.0 0.0002428278 0.1984 AML other m 2018-06-26T11:14:49.61
IV.MURB.HHN. ML:0.0 0.00022855439999999998 0.256 AML other m 2018-06-26T11:14:49.63
IV.MAON.HHN. ML:0.0 0.00003778825 0.3008 AML other m 2018-06-26T11:14:46.62
IV.CASP.HHN. ML:0.0 0.00004286516 1.344 AML other m 2018-06-26T11:14:48.14
IV.MURB.HNE. ML:0.0 0.0002591025 0.2752 AML other m 2018-06-26T11:14:50.04
TV.SF04.EHE. ML:0.0 0.07973472499999999 0.1024 AML other m 2018-06-26T11:14:22.31
TV.SF04.EHN. ML:0.0 0.12203405 0.1408 AML other m 2018-06-26T11:14:22.29
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
Waveforms Seismic signals in miniseed + resp format Download