Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.1 on date 20-10-2013 and time 17:43:39 (Italy) in region 9 km E Foligno (PG)

A magnitude ML 0.1 earthquake occured in region: 9 km E Foligno (PG), on

  • 20-10-2013 15:43:39 (UTC)
  • 20-10-2013 17:43:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9600, 12.8100 at 12 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
Foligno PG 9 57155 57155
Trevi PG 10 8469 65624
Spello PG 12 8645 74269
Valtopina PG 12 1398 75667
Sellano PG 12 1079 76746
Montefalco PG 15 5679 82425
Campello sul Clitunno PG 16 2442 84867
Monte Cavallo MC 16 145 85012
Bevagna PG 17 5081 90093
Nocera Umbra PG 17 5839 95932
Serravalle di Chienti MC 17 1070 97002
Cerreto di Spoleto PG 18 1075 98077
Castel Ritaldi PG 19 3278 101355
Cannara PG 19 4305 105660

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of Foligno (57155 inhabitants)
38 Km E of Perugia (166134 inhabitants)
46 Km N of Terni (111501 inhabitants)
80 Km W of Teramo (54892 inhabitants)
83 Km NW of L'Aquila (69753 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
100 Km S of Fano (60888 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 0.1 2013-10-20
15:43:39		 42.9603 12.8103 12 2015-01-20
11:29:30		 Bollettino Sismico Italiano INGV 4919211
Reviewed
Rev100 		ML 0.1 2013-10-20
15:43:40		 42.9788 12.8143 11 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 4699051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-10-20 15:43:39 ± 0.1
Latitude 42.9603 ± 0.0063
Longitude 12.8103 ± 0.0061
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4919211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 615
Semi-minor axis of confidence ellipse (meter) 521
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 132
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.31656
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.1

Field Value
Value 0.1
Uncertainty 0.4
Num. used stations 1
Type of magnitude ML
Reference to an origin 4699051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-10-20 15:53:02

ML:0.1

Field Value
Value 0.1
Uncertainty 0.4
Num. used stations 1
Type of magnitude ML
Reference to an origin 4919211
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:05:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2013-10-20T15:43:51.93 0.3 undecidable manual S 65 35.1426 93 0.27 69
IV.MOMA.HHE. 2013-10-20T15:43:49.43 0.3 undecidable manual S 228 26.4513 94 0.09 74
IV.FDMO.HHZ. 2013-10-20T15:43:48.53 0.3 undecidable manual S 69 23.9538 95 -0.16 71
IV.CSP1.EHZ. 2013-10-20T15:43:46.72 0.3 undecidable manual P 65 35.1426 93 0.07 72
IV.ASSB.HHZ. 2013-10-20T15:43:46.31 0.3 undecidable manual S 307 15.2736 107 -0.1 74
IV.MOMA.HHE. 2013-10-20T15:43:45.21 0.3 undecidable manual P 228 26.4513 94 -0.1 71
IV.FDMO.HHZ. 2013-10-20T15:43:44.88 0.3 undecidable manual P 69 23.9538 95 -0.06 73
IV.CESI.HHZ. 2013-10-20T15:43:44.87 0.1 undecidable manual S 57 9.0798 131 -0.08 100
IV.ASSB.HHZ. 2013-10-20T15:43:43.68 0.1 undecidable manual P 307 15.2736 107 0.06 99
IV.CESI.HHZ. 2013-10-20T15:43:42.89 0.1 undecidable manual P 57 9.0798 131 0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.4 0.0000332 0.06 AML other m 2013-10-20T15:43:45.12
IV.CESI.HHE. ML:-0.2 0.000008074999999999998 0.6 AML other m 2013-10-20T15:43:45.05
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