Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 21-05-2014 and time 20:16:59 (UTC) in region 4 km N Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km N Norcia (PG), on

  • 21-05-2014 20:16:59 (UTC)
  • 21-05-2014 22:16:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8330, 13.0950 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Norcia PG 4 4957 4957
Preci PG 7 724 5681
Castelsantangelo sul Nera MC 8 281 5962
Visso MC 11 1107 7069
Ussita MC 13 444 7513
Cascia PG 14 3217 10730
Cerreto di Spoleto PG 15 1075 11805
Sellano PG 15 1079 12884
Arquata del Tronto AP 18 1178 14062
Poggiodomo PG 19 117 14179
Montegallo AP 20 523 14702
Monte Cavallo MC 20 145 14847
Accumoli RI 20 667 15514

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
65 Km E of Perugia (166134 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
100 Km N of Tivoli (56533 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
Reviewed
Rev100 		ML 1.2 2014-05-21
20:16:59		 42.8332 13.0947 10 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 6556461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2014-05-21 20:16:59 ± 0.11
Latitude 42.8332 ± 0.0045
Longitude 13.0947 ± 0.0110
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 6556461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 916
Semi-minor axis of confidence ellipse (meter) 441
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 89
Circular confidence region, given by single value of horizontal uncertainty (meter) 920.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 22
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54679
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 3
Type of magnitude ML
Reference to an origin 6556461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2014-05-21 20:28:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2014-05-21T20:17:55.97 3.0 positive manual Pn 2.27 0
IV.T0702.EHZ. 2014-05-21T20:17:53.72 3.0 positive manual Pn 3.56 0
IV.CET2.HHZ. 2014-05-21T20:17:51.95 3.0 undecidable manual Pn 0.39 0
IV.LTRZ.EHZ. 2014-05-21T20:17:45.49 3.0 undecidable manual Pn -1.32 0
IV.CDRU.HHZ. 2014-05-21T20:17:41.85 3.0 undecidable manual Pn 5.04 0
IV.MNTV.HNZ. 2014-05-21T20:17:40.30 3.0 negative manual Pn -1.85 0
IV.APEC.HHZ. 2014-05-21T20:17:30.99 3.0 undecidable manual S 0.1 0
IV.CING.HHZ. 2014-05-21T20:17:18.51 0.3 undecidable manual S 8 60.6948 50 0.32 66
IV.EL6.EHZ. 2014-05-21T20:17:16.83 0.3 undecidable manual S 1 55.1004 50 0.15 69
IV.ATCC.EHZ. 2014-05-21T20:17:16.97 0.3 undecidable manual S 317 53.7018 50 0.65 61
IV.SNTG.HHZ. 2014-05-21T20:17:14.35 0.3 undecidable manual S 345 48.4182 50 -0.56 63
IV.ASSB.HHZ. 2014-05-21T20:17:13.24 0.3 undecidable manual S 303 42.3243 50 -0.04 72
IV.CING.HHZ. 2014-05-21T20:17:10.71 0.6 undecidable manual P 8 60.6948 50 0.56 41
IV.ATCC.EHZ. 2014-05-21T20:17:09.40 0.3 undecidable manual P 317 53.7018 50 0.33 67
IV.EL6.EHZ. 2014-05-21T20:17:09.44 0.3 undecidable manual P 1 55.1004 50 0.16 69
IV.CSP1.EHE. 2014-05-21T20:17:09.49 0.3 undecidable manual S 17 30.0477 50 -0.51 67
IV.CESI.HHE. 2014-05-21T20:17:08.08 0.1 undecidable manual S 321 24.5532 111 -0.22 96
IV.SNTG.HHZ. 2014-05-21T20:17:08.53 1.0 undecidable manual P 345 48.4182 50 0.27 23
IV.LNSS.HHE. 2014-05-21T20:17:08.30 0.1 undecidable manual S 190 25.9518 110 -0.45 91
IV.FDMO.HHE. 2014-05-21T20:17:07.16 0.1 undecidable manual S 358 22.5552 113 -0.51 90
IV.ASSB.HHZ. 2014-05-21T20:17:07.28 0.3 undecidable manual P 303 42.3243 50 -0.04 72
IV.FEMA.HNE. 2014-05-21T20:17:05.28 0.3 undecidable manual S 346 14.7741 123 0.02 76
IV.CSP1.EHE. 2014-05-21T20:17:05.18 0.1 undecidable manual P 17 30.0477 50 -0.25 94
IV.GUMA.HNZ. 2014-05-21T20:17:04.94 3.0 undecidable manual P -0.04 0
IV.CESI.HHE. 2014-05-21T20:17:04.46 0.1 undecidable manual P 321 24.5532 111 0.02 100
IV.LNSS.HHE. 2014-05-21T20:17:04.64 0.1 undecidable manual P 190 25.9518 110 -0.06 99
IV.FDMO.HHE. 2014-05-21T20:17:04.04 0.1 undecidable manual P 358 22.5552 113 -0.04 100
IV.NRCA.HHE. 2014-05-21T20:17:02.77 0.1 undecidable manual S 88 1.5984 170 0.26 99
IV.FEMA.HNE. 2014-05-21T20:17:02.98 0.3 undecidable manual P 346 14.7741 123 0.29 72
IV.NRCA.HHE. 2014-05-21T20:17:01.48 0.1 undecidable manual P 88 1.5984 170 0.38 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.1 0.000041349999999999995 0.18 AML other m 2014-05-21T20:17:13.59
IV.ASSB.HHE. ML:1.3 0.00006385000000000001 0.18 AML other m 2014-05-21T20:17:13.74
IV.GUMA.HHN. ML:1.4 0.00011 1.1 AML other m 2014-05-21T20:17:11.72
IV.GUMA.HHE. ML:1.4 0.00012395 1.06 AML other m 2014-05-21T20:17:12.62
IV.SNTG.HHE. ML:0.6 0.00001193 0.84 AML other m 2014-05-21T20:17:15.01
IV.SNTG.HHN. ML:0.7 0.00001265 1.24 AML other m 2014-05-21T20:17:20.18
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