Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 1.3 on date 04-03-2017 and time 22:45:33 (Italy) in region 4 km E Norcia (PG)

A magnitude Md 1.3 earthquake occured in region: 4 km E Norcia (PG), on

  • 04-03-2017 21:45:33 (UTC)
  • 04-03-2017 22:45:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7970, 13.1420 at 12 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
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 13 1178 7140
Cascia PG 14 3217 10357
Accumoli RI 14 667 11024
Visso MC 16 1107 12131
Montegallo AP 17 523 12654
Ussita MC 17 444 13098
Cerreto di Spoleto PG 19 1075 14173
Montemonaco AP 19 604 14777
Poggiodomo PG 19 117 14894
Cittareale RI 20 482 15376

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km W of Pescara (121014 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km NW of Chieti (51815 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 		Md 1.3 2017-03-04
21:45:33		 42.7967 13.1418 12 2017-03-04
22:00:54		 Sala Sismica INGV-Roma 41973271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-04 21:45:33 ± 0.06
Latitude 42.7967 ± 0.0018
Longitude 13.1418 ± 0.0025
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 41973271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 216
Semi-minor axis of confidence ellipse (meter) 100
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 316
Circular confidence region, given by single value of horizontal uncertainty (meter) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.05
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.20055
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 6
Magnitude information

Md:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 5
Type of magnitude Md
Reference to an origin 41973271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-04 22:00:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.RISI.HHZ. 2017-03-04T21:46:56.52 3.0 undecidable manual Sn -5.59 0
IV.CAFE.HHZ. 2017-03-04T21:46:56.73 3.0 undecidable manual Sg 11.17 0
IV.SACR.HHZ. 2017-03-04T21:46:40.66 3.0 undecidable manual Sg 7.86 0
IV.SGTA.HHZ. 2017-03-04T21:46:36.74 3.0 undecidable manual Sn -8.73 0
IV.TRIV.HHZ. 2017-03-04T21:46:32.11 3.0 undecidable manual Sg 7.04 0
IV.MSSA.HHZ. 2017-03-04T21:46:24.90 3.0 undecidable manual Sn -2.07 0
IV.MCRV.HHZ. 2017-03-04T21:46:16.74 3.0 undecidable manual Pg 6.34 0
OX.MPRI.HHZ. 2017-03-04T21:46:16.56 3.0 undecidable manual Pg 7.63 0
IV.APEC.HHZ. 2017-03-04T21:46:00.94 3.0 undecidable manual Sg 9.92 0
IV.MNTV.HNZ. 2017-03-04T21:45:59.98 3.0 positive manual Pn 2.51 0
IV.PTRJ.HNZ. 2017-03-04T21:45:58.04 3.0 undecidable manual Pn -2.4 0
IV.T1101.EHZ. 2017-03-04T21:45:51.35 3.0 undecidable manual Pn -8.1 0
IV.ATTE.HHZ. 2017-03-04T21:45:49.41 3.0 undecidable manual Sn 0.4 0
IV.T1215.EHZ. 2017-03-04T21:45:41.83 0.6 undecidable manual S 272 22.2555 97 -0.08 96
IV.MC2.EHZ. 2017-03-04T21:45:39.70 0.6 undecidable manual S 17 13.2756 114 0.11 97
IV.T1218.EHZ. 2017-03-04T21:45:39.84 0.6 undecidable manual S 189 14.1747 111 0.03 98
IV.T1245.HHZ. 2017-03-04T21:45:38.32 0.6 undecidable manual S 29 7.5813 138 -0.05 99
IV.T1212.EHZ. 2017-03-04T21:45:38.80 0.6 undecidable manual S 238 9.3795 130 0.1 98
IV.T1215.EHZ. 2017-03-04T21:45:38.39 1.0 undecidable manual P 272 22.2555 97 0.03 49
IV.CPGN.EHZ. 2017-03-04T21:45:38.57 3.0 undecidable manual P -0.8 0
IV.T1214.EHZ. 2017-03-04T21:45:38.20 0.6 undecidable manual S 127 6.7932 142 -0.03 100
IV.T1218.EHZ. 2017-03-04T21:45:37.04 1.0 undecidable manual P 189 14.1747 111 -0.11 48
IV.MC2.EHZ. 2017-03-04T21:45:36.96 0.6 undecidable manual P 17 13.2756 114 -0.06 98
IV.T1214.EHZ. 2017-03-04T21:45:36.24 1.0 negative manual P 127 6.7932 142 0.01 50
IV.T1245.HHZ. 2017-03-04T21:45:36.28 0.6 positive manual P 29 7.5813 138 -0.03 99
IV.T1212.EHZ. 2017-03-04T21:45:36.54 0.6 negative manual P 238 9.3795 130 0.04 99
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