Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 30-12-2013 and time 14:50:20 (UTC) in region 5 km S Massa Martana (PG)

A magnitude ML 2.0 earthquake occured in region: 5 km S Massa Martana (PG), on

  • 30-12-2013 14:50:20 (UTC)
  • 30-12-2013 15:50:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7340, 12.5180 at 9 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
Massa Martana PG 5 3770 3770
Acquasparta TR 5 4778 8548
Montecastrilli TR 10 5022 13570
Todi PG 11 16851 30421
Avigliano Umbro TR 11 2558 32979
Giano dell'Umbria PG 12 3846 36825
San Gemini TR 14 5018 41843
Castel Ritaldi PG 16 3278 45121
Monte Castello di Vibio PG 18 1567 46688
Spoleto PG 18 38218 84906
Fratta Todina PG 19 1839 86745
Collazzone PG 19 3473 90218
Gualdo Cattaneo PG 20 6155 96373

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Terni (111501 inhabitants)
29 Km SW of Foligno (57155 inhabitants)
43 Km S of Perugia (166134 inhabitants)
49 Km NE of Viterbo (67173 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
89 Km N of Tivoli (56533 inhabitants)
93 Km NE of Civitavecchia (52991 inhabitants)
93 Km N of Roma (2864731 inhabitants)
97 Km SE of Arezzo (99543 inhabitants)
97 Km W of Teramo (54892 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 2013-12-30
14:50:20		 42.7337 12.5177 9 2015-01-20
11:30:48		 Bollettino Sismico Italiano INGV 8492111
Reviewed
Rev100 		ML 2.0 2013-12-30
14:50:20		 42.7337 12.5177 9 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 5120181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-12-30 14:50:20 ± 0.06
Latitude 42.7337 ± 0.0027
Longitude 12.5177 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 8492111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 302
Semi-minor axis of confidence ellipse (meter) 287
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 202
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.07644
Epicentral distance of station farthest from the epicenter (degree) 0.51531
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 8492111
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:09:40

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 1
Type of magnitude ML
Reference to an origin 5120181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-12-30 14:57:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2013-12-30T14:50:39.09 0.1 undecidable manual S 54 57.1983 50 0.08 93
IV.NRCA.HHZ. 2013-12-30T14:50:37.13 0.1 undecidable manual S 77 49.8168 50 0.09 94
IV.CESI.HHZ. 2013-12-30T14:50:35.23 0.1 undecidable manual S 46 43.5231 50 -0.13 94
IV.MGAB.HHZ. 2013-12-30T14:50:34.11 0.1 undecidable manual S 301 38.5281 50 0.09 95
IV.FDMO.HHZ. 2013-12-30T14:50:31.25 0.6 negative manual P 54 57.1983 50 -0.04 47
IV.ARRO.EHZ. 2013-12-30T14:50:30.56 0.1 undecidable manual S 130 26.5512 108 0.15 96
IV.NRCA.HHZ. 2013-12-30T14:50:30.01 0.1 negative manual P 77 49.8168 50 -0.14 93
IV.CESI.HHZ. 2013-12-30T14:50:29.17 0.3 positive manual P 46 43.5231 50 -0.01 72
IV.MGAB.HHZ. 2013-12-30T14:50:28.32 0.1 positive manual P 301 38.5281 50 -0.09 95
IV.CESX.HHZ. 2013-12-30T14:50:26.56 0.1 undecidable manual S 158 14.9739 120 -0.18 98
IV.ARRO.EHZ. 2013-12-30T14:50:26.27 0.6 positive manual P 130 26.5512 108 -0.05 49
IV.CESX.HHZ. 2013-12-30T14:50:24.37 0.6 positive manual P 158 14.9739 120 0.17 49
IV.MOMA.HNZ. 2013-12-30T14:50:24.83 0.1 undecidable manual S 29 8.4804 135 -0.12 100
IV.MOMA.HNZ. 2013-12-30T14:50:23.46 0.3 negative manual P 29 8.4804 135 0.29 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:1.8 0.000389 0.82 AML other m 2013-12-30T14:50:31.70
IV.ARRO.EHN. ML:1.9 0.0004865 0.16 AML other m 2013-12-30T14:50:32.58
IV.CESX.HHN. ML:2.0 0.0009255 0.26 AML other m 2013-12-30T14:50:26.90
IV.CESX.HHE. ML:2.0 0.0009875 0.32 AML other m 2013-12-30T14:50:28.65
IV.FDMO.HHN. ML:1.7 0.00010395 1.14 AML other m 2013-12-30T14:50:40.42
IV.FDMO.HHE. ML:1.6 0.00008665 0.52 AML other m 2013-12-30T14:50:40.70
IV.MGAB.HNN. ML:2.0 0.0003215 0.92 AML other m 2013-12-30T14:50:35.73
IV.MGAB.HNE. ML:2.0 0.0003745 0.54 AML other m 2013-12-30T14:50:35.50
IV.MGAB.HHE. ML:2.0 0.00040649999999999996 0.2 AML other m 2013-12-30T14:50:35.50
IV.MGAB.HHN. ML:2.0 0.00034899999999999997 0.92 AML other m 2013-12-30T14:50:35.73
IV.MOMA.HNE. ML:2.3 0.0031349999999999998 0.14 AML other m 2013-12-30T14:50:25.48
IV.MURB.HHE. ML:2.3 0.0003905 0.34 AML other m 2013-12-30T14:50:43.34
IV.MURB.HHN. ML:2.3 0.00041400000000000003 0.26 AML other m 2013-12-30T14:50:43.32
IV.NRCA.HHN. ML:2.0 0.00029400000000000004 0.12 AML other m 2013-12-30T14:50:37.78
IV.NRCA.HHE. ML:1.9 0.000201 1 AML other m 2013-12-30T14:50:38.46
IV.SMA1.EHN. ML:2.0 0.00016749999999999998 0.28 AML other m 2013-12-30T14:50:43.02
IV.SMA1.EHE. ML:2.2 0.0002825 0.44 AML other m 2013-12-30T14:50:44.09
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
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