Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 23-04-2013 and time 01:08:15 (Italy) in region 6 km W Sellano (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km W Sellano (PG), on

  • 22-04-2013 23:08:15 (UTC)
  • 23-04-2013 01:08:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9060, 12.8570 at 10 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
Sellano PG 6 1079 1079
Trevi PG 9 8469 9548
Cerreto di Spoleto PG 11 1075 10623
Campello sul Clitunno PG 11 2442 13065
Foligno PG 14 57155 70220
Vallo di Nera PG 15 364 70584
Preci PG 15 724 71308
Monte Cavallo MC 15 145 71453
Montefalco PG 17 5679 77132
Castel Ritaldi PG 18 3278 80410
Spello PG 18 8645 89055
Valtopina PG 19 1398 90453
Sant'Anatolia di Narco PG 19 564 91017
Visso MC 19 1107 92124

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
44 Km SE of Perugia (166134 inhabitants)
74 Km W of Teramo (54892 inhabitants)
76 Km NW of L'Aquila (69753 inhabitants)
82 Km NE of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 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 1.1 2013-04-22
23:08:15		 42.9055 12.8572 10 2015-01-20
11:25:07		 Bollettino Sismico Italiano INGV 3714611
Reviewed
Rev100 		ML 1.2 2013-04-22
23:08:16		 42.906 12.8583 13 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 3301351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-04-22 23:08:15 ± 0.07
Latitude 42.9055 ± 0.0036
Longitude 12.8572 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 3714611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 344
Semi-minor axis of confidence ellipse (meter) 335
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 47
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.10522
Epicentral distance of station farthest from the epicenter (degree) 0.53060
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 5
Type of magnitude ML
Reference to an origin 3301351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-04-22 23:13:21

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 5
Type of magnitude ML
Reference to an origin 3714611
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:24:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HHZ. 2013-04-22T23:08:34.70 0.3 undecidable manual S 28 58.8966 50 0.34 66
IV.EL6.EHZ. 2013-04-22T23:08:32.42 0.6 undecidable manual S 23 51.0156 50 0.16 46
IV.ATCC.EHZ. 2013-04-22T23:08:28.28 0.3 undecidable manual S 330 35.6421 50 0.12 72
IV.LNSS.HHZ. 2013-04-22T23:08:28.55 0.3 undecidable manual S 156 36.741 50 0.1 72
IV.CSP1.EHZ. 2013-04-22T23:08:27.98 0.3 undecidable manual S 54 34.9428 50 0 74
IV.CING.HHZ. 2013-04-22T23:08:26.46 0.6 negative manual P 28 58.8966 50 -0.13 46
IV.MOMA.HHZ. 2013-04-22T23:08:25.61 0.6 undecidable manual S 244 26.1516 50 -0.03 50
IV.EL6.EHZ. 2013-04-22T23:08:25.21 0.6 undecidable manual P 23 51.0156 50 -0.17 46
IV.ASSB.HHZ. 2013-04-22T23:08:24.33 0.3 undecidable manual S 313 22.1556 115 -0.12 74
IV.NRCA.HHZ. 2013-04-22T23:08:24.56 0.3 undecidable manual S 111 22.3554 114 0.05 75
IV.FDMO.HHZ. 2013-04-22T23:08:24.51 0.3 undecidable manual S 52 23.6541 113 -0.42 69
IV.LNSS.HHZ. 2013-04-22T23:08:23.18 0.3 undecidable manual P 156 36.741 50 0 74
IV.SNTG.HHZ. 2013-04-22T23:08:23.07 0.3 undecidable manual P 10 39.3273 50 -0.51 66
IV.CSP1.EHZ. 2013-04-22T23:08:22.83 1.0 negative manual P 54 34.9428 50 -0.08 24
IV.ATCC.EHZ. 2013-04-22T23:08:22.97 0.6 positive manual P 330 35.6421 50 -0.05 49
IV.CESI.HHZ. 2013-04-22T23:08:21.77 0.3 undecidable manual S 19 11.6772 131 0.41 70
IV.FDMO.HHZ. 2013-04-22T23:08:21.01 0.6 positive manual P 52 23.6541 113 -0.14 49
IV.MOMA.HHZ. 2013-04-22T23:08:21.62 0.3 negative manual P 244 26.1516 50 0.06 74
IV.ASSB.HHZ. 2013-04-22T23:08:20.82 0.3 undecidable manual P 313 22.1556 115 -0.05 75
IV.NRCA.HHZ. 2013-04-22T23:08:20.94 0.1 positive manual P 111 22.3554 114 0.03 100
IV.CESI.HHZ. 2013-04-22T23:08:19.47 0.6 undecidable manual P 19 11.6772 131 0.38 47
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.2 0.00011125000000000002 0.38 AML other m 2013-04-22T23:08:24.69
IV.ASSB.HHE. ML:1.2 0.00009425 0.32 AML other m 2013-04-22T23:08:25.11
IV.CESI.HHE. ML:0.5 0.0000351 0.58 AML other m 2013-04-22T23:08:22.27
IV.CESI.HHN. ML:0.8 0.00007465 0.32 AML other m 2013-04-22T23:08:22.17
IV.FDMO.HHN. ML:1.1 0.00007569999999999998 0.12 AML other m 2013-04-22T23:08:24.98
IV.FDMO.HHE. ML:1.0 0.00006309999999999999 0.88 AML other m 2013-04-22T23:08:24.80
IV.MOMA.HHN. ML:1.4 0.000157 0.2 AML other m 2013-04-22T23:08:26.45
IV.MOMA.HHE. ML:1.5 0.000184 0.16 AML other m 2013-04-22T23:08:26.41
IV.NRCA.HHN. ML:1.3 0.0001245 0.14 AML other m 2013-04-22T23:08:24.71
IV.NRCA.HHE. ML:1.1 0.00007815 0.16 AML other m 2013-04-22T23:08:25.94
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