Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 18-09-2012 and time 05:58:23 (UTC) in region 4 km SE Castel Giorgio (TR)

A magnitude ML 2.0 earthquake occured in region: 4 km SE Castel Giorgio (TR), on

  • 18-09-2012 05:58:23 (UTC)
  • 18-09-2012 07:58:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6790, 12.0000 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
Castel Giorgio TR 4 2131 2131
Bolsena VT 4 3991 6122
San Lorenzo Nuovo VT 8 2091 8213
Porano TR 9 1966 10179
Castel Viscardo TR 9 2938 13117
Orvieto TR 10 20630 33747
Bagnoregio VT 10 3650 37397
Lubriano VT 10 909 38306
Grotte di Castro VT 11 2683 40989
Gradoli VT 12 1353 42342
Acquapendente VT 13 5506 47848
Allerona TR 15 1794 49642
Onano VT 15 995 50637
Latera VT 15 836 51473
Montefiascone VT 16 13432 64905
Capodimonte VT 16 1731 66636
Proceno VT 16 557 67193
Celleno VT 17 1355 68548
Marta VT 17 3499 72047
Castiglione in Teverina VT 17 2329 74376
Civitella d'Agliano VT 17 1640 76016
Baschi TR 18 2722 78738
Ficulle TR 19 1669 80407
Valentano VT 19 2868 83275

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km N of Viterbo (67173 inhabitants)
55 Km W of Terni (111501 inhabitants)
57 Km SW of Perugia (166134 inhabitants)
65 Km W of Foligno (57155 inhabitants)
67 Km N of Civitavecchia (52991 inhabitants)
73 Km E of Grosseto (82087 inhabitants)
88 Km S of Arezzo (99543 inhabitants)
90 Km SE of Siena (53903 inhabitants)
96 Km NW of Roma (2864731 inhabitants)
96 Km NW of Guidonia Montecelio (88673 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 2.0 2012-09-18
05:58:23		 42.6787 11.9998 6 2014-09-19
08:14:18		 Bollettino Sismico Italiano INGV 2957151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2012-09-18 05:58:23 ± 0.2
Latitude 42.6787 ± 0.0090
Longitude 11.9998 ± 0.0122
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 2957151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 962
Semi-minor axis of confidence ellipse (meter) 808
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 960.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.98476
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 2957151
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2014-09-18 12:44:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T0819.EHZ. 2012-09-18T05:59:01.05 3.0 negative manual Pn -3.09 0
IV.MAON.HHZ. 2012-09-18T05:58:48.84 0.3 undecidable manual S 249 76.2681 50 1.15 47
IV.ATVA.EHZ. 2012-09-18T05:58:46.28 0.6 undecidable manual S 19 70.4739 50 0.13 46
IV.CAFI.HHZ. 2012-09-18T05:58:46.64 0.6 undecidable manual S 358 72.1722 50 0.03 46
IV.TOLF.HHZ. 2012-09-18T05:58:44.88 0.6 undecidable manual S 180 68.1762 50 -0.65 40
IV.PARC.HHZ. 2012-09-18T05:58:43.20 0.3 undecidable manual P 10 109.3128 50 0.53 58
IV.FDMO.HHZ. 2012-09-18T05:58:41.71 0.3 undecidable manual P 65 96.9252 50 0.95 50
IV.CASP.HHZ. 2012-09-18T05:58:40.65 0.1 negative manual P 278 93.24 50 0.45 82
IV.ARCI.HHZ. 2012-09-18T05:58:38.43 0.6 undecidable manual S 294 46.8198 50 -1.41 29
IV.MAON.HHZ. 2012-09-18T05:58:38.25 0.6 undecidable manual P 249 76.2681 50 0.68 39
IV.ATVO.HHZ. 2012-09-18T05:58:38.81 0.3 undecidable manual P 23 84.7485 50 -0.07 68
IV.ATMI.HHZ. 2012-09-18T05:58:37.60 0.3 undecidable manual P 17 75.8685 50 0.08 68
IV.ATVA.EHZ. 2012-09-18T05:58:36.39 0.3 undecidable manual P 19 70.4739 50 -0.29 66
IV.CAFI.HHZ. 2012-09-18T05:58:36.55 0.3 undecidable manual P 358 72.1722 50 -0.4 65
IV.ARRO.EHZ. 2012-09-18T05:58:36.48 0.6 undecidable manual P 100 63.492 50 0.88 37
IV.ATTE.HHZ. 2012-09-18T05:58:35.87 0.1 undecidable manual P 26 64.3911 50 0.13 92
IV.TOLF.HHZ. 2012-09-18T05:58:35.51 0.3 undecidable manual P 180 68.1762 50 -0.82 56
IV.MGAB.HHZ. 2012-09-18T05:58:33.70 0.6 undecidable manual S 19 27.5502 102 0.18 49
IV.MCIV.HHZ. 2012-09-18T05:58:33.42 0.6 undecidable manual S 293 28.5492 102 -0.47 46
IV.ARCI.HHZ. 2012-09-18T05:58:32.59 0.3 undecidable manual P 294 46.8198 50 -0.45 67
IV.CESX.HHZ. 2012-09-18T05:58:32.30 0.3 undecidable manual P 99 48.5181 50 -1 54
IV.LATE.HHZ. 2012-09-18T05:58:30.32 0.3 undecidable manual S 246 17.5713 109 0.14 75
IV.MGAB.HHZ. 2012-09-18T05:58:29.32 0.1 positive manual P 19 27.5502 102 -0.07 100
IV.MCIV.HHZ. 2012-09-18T05:58:29.32 0.1 undecidable manual P 293 28.5492 102 -0.28 96
IV.LATE.HHZ. 2012-09-18T05:58:27.74 0.1 positive manual P 246 17.5713 109 0.28 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATMI.HHE. ML:2.4 0.00035499999999999996 0.44 AML other m 2012-09-18T05:58:52.79
IV.ATMI.HHN. ML:2.6 0.0005250000000000001 0.52 AML other m 2012-09-18T05:58:54.90
IV.ATTE.HHN. ML:2.0 0.0001955 0.3 AML other m 2012-09-18T05:58:45.82
IV.ATTE.HHE. ML:2.1 0.00023349999999999998 1.02 AML other m 2012-09-18T05:58:48.16
IV.ATVA.EHE. ML:1.8 0.00010755000000000001 0.46 AML other m 2012-09-18T05:58:53.95
IV.ATVA.EHN. ML:1.7 0.00008455 0.56 AML other m 2012-09-18T05:58:51.68
IV.ATVO.HHE. ML:2.0 0.000127 0.8 AML other m 2012-09-18T05:58:53.79
IV.ATVO.HHN. ML:1.9 0.00009735 0.46 AML other m 2012-09-18T05:58:58.78
IV.CAFI.HHN. ML:1.9 0.00011649999999999999 0.44 AML other m 2012-09-18T05:58:49.98
IV.CAFI.HHE. ML:2.0 0.0001525 0.56 AML other m 2012-09-18T05:58:50.48
IV.CASP.HHN. ML:2.2 0.0001825 0.44 AML other m 2012-09-18T05:58:55.30
IV.CASP.HHE. ML:1.9 0.00007985 0.44 AML other m 2012-09-18T05:58:55.34
IV.CSNT.HHN. ML:1.4 0.0000234 0.46 AML other m 2012-09-18T05:58:59.72
IV.CSNT.HHE. ML:1.4 0.00002385 0.7 AML other m 2012-09-18T05:59:01.84
IV.FDMO.HHN. ML:1.9 0.0000807 1.06 AML other m 2012-09-18T05:59:01.51
IV.FDMO.HHE. ML:2.0 0.00009970000000000001 1.12 AML other m 2012-09-18T05:59:02.55
IV.LATE.HHE. ML:2.6 0.0037 1.58 AML other m 2012-09-18T05:58:33.24
IV.LATE.HHN. ML:2.7 0.00468 0.26 AML other m 2012-09-18T05:58:34.10
IV.MCIV.HHE. ML:2.0 0.0004875 0.68 AML other m 2012-09-18T05:58:34.14
IV.MCIV.HHN. ML:2.1 0.0006730000000000001 0.22 AML other m 2012-09-18T05:59:04.19
IV.MGAB.HNN. ML:2.1 0.000669 1.46 AML other m 2012-09-18T05:58:35.50
IV.MGAB.HHE. ML:2.2 0.000891 0.38 AML other m 2012-09-18T05:58:38.60
IV.MGAB.HNE. ML:2.2 0.000822 1.22 AML other m 2012-09-18T05:58:37.99
IV.MGAB.HHN. ML:2.1 0.0007115 1.48 AML other m 2012-09-18T05:58:35.50
IV.PARC.HHE. ML:2.0 0.000093 1.06 AML other m 2012-09-18T05:58:59.30
IV.PARC.HHN. ML:2.0 0.0000837 0.72 AML other m 2012-09-18T05:59:01.29
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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