Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 16-03-2014 and time 19:37:57 (UTC) in region 2 km SW Piancastagnaio (SI)

A magnitude ML 2.5 earthquake occured in region: 2 km SW Piancastagnaio (SI), on

  • 16-03-2014 19:37:57 (UTC)
  • 16-03-2014 20:37:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8380, 11.6830 at 6 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 2 4230 4230
Abbadia San Salvatore SI 5 6444 10674
Castell'Azzara GR 7 1476 12150
Santa Fiora GR 8 2622 14772
Radicofani SI 10 1097 15869
Arcidosso GR 12 4285 20154
Castel del Piano GR 13 4690 24844
Seggiano GR 14 961 25805
Proceno VT 15 557 26362
Roccalbegna GR 15 1044 27406
San Casciano dei Bagni SI 16 1632 29038
Semproniano GR 17 1059 30097
Sorano GR 18 3428 33525
Acquapendente VT 18 5506 39031
Onano VT 19 995 40026
Castiglione d'Orcia SI 19 2346 42372

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km E of Grosseto (82087 inhabitants)
58 Km NW of Viterbo (67173 inhabitants)
61 Km SE of Siena (53903 inhabitants)
65 Km W of Perugia (166134 inhabitants)
72 Km S of Arezzo (99543 inhabitants)
83 Km N of Civitavecchia (52991 inhabitants)
84 Km W of Foligno (57155 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 2.5 2014-03-16
19:37:57		 42.838 11.6832 6 2015-09-21
09:35:11		 Bollettino Sismico Italiano INGV 16453191
Reviewed
Rev100 		ML 2.5 2014-03-16
19:37:57		 42.8495 11.6803 1 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 5766801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2014-03-16 19:37:57 ± 0.09
Latitude 42.8380 ± 0.0054
Longitude 11.6832 ± 0.0049
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 16453191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 411
Semi-minor axis of confidence ellipse (meter) 398
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 13
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 51
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.15288
Epicentral distance of station farthest from the epicenter (degree) 1.45510
Number of stations at which the event was observed 44
Number of stations from which data was used for origin computation 44
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 1
Type of magnitude ML
Reference to an origin 16453191
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-02-17 15:36:55

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 35
Type of magnitude ML
Reference to an origin 5766801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2014-03-16 19:51:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BDI.HHZ. 2014-03-16T19:38:24.49 0.1 undecidable manual P 328 161.5161 50 0.15 74
IV.LMD.HHZ. 2014-03-16T19:38:21.03 0.1 undecidable manual P 1 137.5623 50 0.4 76
IV.ATMI.HHZ. 2014-03-16T19:38:21.00 0.6 undecidable manual S 41 72.6717 50 0.62 41
IV.MOMA.HHZ. 2014-03-16T19:38:20.50 0.6 undecidable manual S 93 72.1722 50 0.25 45
IV.FIAM.HHZ. 2014-03-16T19:38:20.32 0.1 undecidable manual P 118 133.1667 50 0.36 78
IV.SMA1.EHZ. 2014-03-16T19:38:20.70 0.1 undecidable manual P 99 136.5633 50 0.21 79
IV.MTCE.HHZ. 2014-03-16T19:38:19.20 0.1 undecidable manual P 136 125.2746 50 0.45 77
IV.MPAG.EHZ. 2014-03-16T19:38:18.84 0.1 undecidable manual P 44 123.5874 50 0.36 79
IV.CRMI.HHZ. 2014-03-16T19:38:18.31 0.1 undecidable manual P 332 120.4905 50 0.31 81
IV.ARVD.HHZ. 2014-03-16T19:38:18.85 0.1 undecidable manual P 54 125.3745 50 0.08 84
IV.SFI.EHZ. 2014-03-16T19:38:18.24 0.1 undecidable manual P 6 119.0919 50 0.45 78
IV.ATTE.HHE. 2014-03-16T19:38:18.80 0.6 undecidable manual S 53 67.4769 50 -0.21 46
IV.FEMA.HNE. 2014-03-16T19:38:17.35 0.1 undecidable manual P 82 111.8991 50 0.66 74
IV.LNSS.HHZ. 2014-03-16T19:38:17.15 0.1 undecidable manual P 103 113.5974 50 0.19 84
IV.NRCA.HHE. 2014-03-16T19:38:17.65 0.1 undecidable manual P 90 116.3946 50 0.26 82
IV.CELB.HHZ. 2014-03-16T19:38:17.93 0.1 undecidable manual P 266 120.2907 50 -0.05 85
IV.FDMO.HHZ. 2014-03-16T19:38:17.71 0.1 undecidable manual P 79 116.0949 50 0.37 80
IV.NARO.HHZ. 2014-03-16T19:38:16.85 0.1 undecidable manual P 40 112.2987 50 0.1 85
IV.ASQU.HHZ. 2014-03-16T19:38:16.24 0.1 undecidable manual P 5 106.7154 50 0.35 82
IV.RUFI.EHZ. 2014-03-16T19:38:16.90 0.1 undecidable manual P 353 111.7992 50 0.22 83
IV.PARC.HHZ. 2014-03-16T19:38:15.04 0.1 undecidable manual P 26 100.5216 50 0.11 87
IV.PIEI.HHZ. 2014-03-16T19:38:15.57 0.1 undecidable manual P 41 103.6185 50 0.16 86
IV.FOSV.EHZ. 2014-03-16T19:38:14.56 0.3 undecidable manual P 60 101.0211 50 -0.45 61
IV.SRES.HHZ. 2014-03-16T19:38:14.27 0.3 undecidable manual P 134 94.9383 50 0.2 65
IV.ATFO.HHZ. 2014-03-16T19:38:13.40 0.3 undecidable manual P 51 92.8404 50 -0.35 63
IV.CRE.HHZ. 2014-03-16T19:38:13.06 0.3 undecidable manual P 14 89.3439 50 -0.14 67
IV.SSP9.EHZ. 2014-03-16T19:38:13.67 0.3 undecidable manual P 24 89.3439 50 0.46 62
IV.ATCC.EHZ. 2014-03-16T19:38:12.51 0.1 undecidable manual P 63 86.6466 50 -0.29 87
IV.ATPI.EHZ. 2014-03-16T19:38:12.90 0.1 undecidable manual P 40 89.4438 50 -0.34 85
IV.ATVO.HHZ. 2014-03-16T19:38:12.01 0.1 undecidable manual P 44 84.1491 50 -0.4 85
IV.BADI.EHZ. 2014-03-16T19:38:12.41 0.3 undecidable manual P 31 87.246 50 -0.48 62
IV.TOLF.HHZ. 2014-03-16T19:38:12.83 0.3 undecidable manual P 163 89.6436 50 -0.44 62
IV.CESX.HHZ. 2014-03-16T19:38:11.69 0.3 undecidable manual P 109 77.8665 50 0.24 67
IV.ASSB.HHZ. 2014-03-16T19:38:11.67 0.1 undecidable manual P 74 82.4508 50 -0.47 84
IV.MURB.HHZ. 2014-03-16T19:38:11.89 0.1 undecidable manual P 55 82.9503 50 -0.33 86
IV.OSSC.HHZ. 2014-03-16T19:38:11.93 0.1 undecidable manual P 335 83.8494 50 -0.44 84
IV.MOMA.HHZ. 2014-03-16T19:38:10.50 0.1 undecidable manual P 93 72.1722 50 -0.06 93
IV.ATMI.HHZ. 2014-03-16T19:38:10.29 0.1 undecidable manual P 41 72.6717 50 -0.35 88
IV.TRIF.HHZ. 2014-03-16T19:38:10.31 0.1 undecidable manual P 296 70.374 50 0.02 94
IV.CASP.HHZ. 2014-03-16T19:38:09.40 0.1 undecidable manual P 266 66.7776 50 -0.34 89
IV.MGAB.HHZ. 2014-03-16T19:38:09.60 0.6 undecidable manual S 76 35.8419 99 -0.31 47
IV.ATTE.HHE. 2014-03-16T19:38:09.19 0.1 undecidable manual P 53 67.4769 50 -0.65 81
IV.FROS.HHZ. 2014-03-16T19:38:08.34 0.1 positive manual P 314 59.3961 50 -0.25 92
IV.CAFI.HHZ. 2014-03-16T19:38:08.05 0.1 positive manual P 23 59.0964 50 -0.51 87
IV.LATE.HHZ. 2014-03-16T19:38:06.40 0.3 undecidable manual S 158 26.751 102 -0.41 71
IV.MGAB.HHZ. 2014-03-16T19:38:04.16 0.1 positive manual P 76 35.8419 99 -0.43 92
IV.SACS.HHZ. 2014-03-16T19:38:04.60 0.6 undecidable manual S 86 18.4704 107 0.59 45
IV.ARCI.HHE. 2014-03-16T19:38:03.70 0.3 undecidable manual S 275 16.9719 108 0.18 75
IV.LATE.HHZ. 2014-03-16T19:38:02.67 0.1 positive manual P 158 26.751 102 -0.12 100
IV.ARCI.HHE. 2014-03-16T19:38:01.12 0.1 undecidable manual P 275 16.9719 108 0.22 100
IV.SACS.HHZ. 2014-03-16T19:38:01.49 0.1 undecidable manual P 86 18.4704 107 0.31 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGAB.HNN. ML:2.3 0.0030999999999999995 0.6 AML other m 2014-03-16T19:38:10.72
IV.MGAB.HHN. ML:2.9 0.003195 0.28 AML other m 2014-03-16T19:38:14.45
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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