Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.2 on date 16-04-2017 and time 19:47:59 (UTC) in region 5 km SE Norcia (PG)

A magnitude ML 0.2 earthquake occured in region: 5 km SE Norcia (PG), on

  • 16-04-2017 19:47:59 (UTC)
  • 16-04-2017 21:47:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7720, 13.1410 at 8 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 5 4957 4957
Cascia PG 12 3217 8174
Accumoli RI 12 667 8841
Arquata del Tronto AP 13 1178 10019
Castelsantangelo sul Nera MC 14 281 10300
Preci PG 15 724 11024
Cittareale RI 17 482 11506
Montegallo AP 18 523 12029
Poggiodomo PG 18 117 12146
Visso MC 18 1107 13253
Cerreto di Spoleto PG 19 1075 14328
Ussita MC 19 444 14772
Amatrice RI 20 2657 17429

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km SE of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
72 Km SE of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
94 Km W of Pescara (121014 inhabitants)
96 Km W of Chieti (51815 inhabitants)
99 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
Reviewed
Rev100 		ML 0.2 2017-04-16
19:47:59		 42.7723 13.1412 8 2017-04-16
20:33:37		 Sala Sismica INGV-Roma 43979621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-04-16 19:47:59 ± 0.12
Latitude 42.7723 ± 0.0018
Longitude 13.1412 ± 0.0037
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 43979621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 280
Semi-minor axis of confidence ellipse (meter) 44
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
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 20
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.10432
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.2

Field Value
Value 0.2
Uncertainty 0.3
Num. used stations 3
Type of magnitude ML
Reference to an origin 43979621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-04-16 20:33:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AGLI.HHZ. 2017-04-16T19:49:38.61 3.0 undecidable manual Sg 19.67 0
GU.RORO.HHZ. 2017-04-16T19:49:36.58 3.0 undecidable manual Sn 0.58 0
IV.ZCCA.HHZ. 2017-04-16T19:49:09.17 3.0 undecidable manual Sg 12.26 0
GU.MGRO.HHZ. 2017-04-16T19:49:05.63 3.0 undecidable manual Pg 16.84 0
IV.VARE.HHZ. 2017-04-16T19:48:56.89 3.0 undecidable manual Pn 3.49 0
IV.MSAG.HHZ. 2017-04-16T19:48:47.13 3.0 undecidable manual Sn 1.03 0
GU.RNCA.HHZ. 2017-04-16T19:48:40.35 3.0 positive manual Pn -0.63 0
IV.COR1.EHZ. 2017-04-16T19:48:28.50 3.0 undecidable manual Sg 0.61 0
IV.PTQR.HHZ. 2017-04-16T19:48:20.40 3.0 undecidable manual Sg 0.69 0
IV.LAV9.HHZ. 2017-04-16T19:48:08.28 3.0 negative manual P 0.59 0
IV.T1218.EHZ. 2017-04-16T19:48:04.48 0.3 undecidable manual S 191 11.5773 123 -0.08 73
IV.T1245.HHZ. 2017-04-16T19:48:04.21 0.3 undecidable manual S 22 10.0788 127 0.08 73
IV.T1214.EHZ. 2017-04-16T19:48:03.04 0.1 undecidable manual S 104 5.6943 143 0 100
IV.T1212.EHZ. 2017-04-16T19:48:03.65 0.1 undecidable manual S 254 8.1807 132 0.02 99
IV.NRCA.HHE. 2017-04-16T19:48:03.29 0.1 undecidable manual S 342 7.0929 136 -0.07 98
IV.T1218.EHZ. 2017-04-16T19:48:02.49 0.1 undecidable manual P 191 11.5773 123 -0.05 98
IV.T1245.HHZ. 2017-04-16T19:48:02.11 0.3 undecidable manual P 22 10.0788 127 -0.19 72
IV.T1212.EHZ. 2017-04-16T19:48:02.09 0.1 undecidable manual P 254 8.1807 132 0.09 98
IV.T1214.EHZ. 2017-04-16T19:48:01.77 0.1 undecidable manual P 104 5.6943 143 0.11 98
IV.NRCA.HHE. 2017-04-16T19:48:01.91 0.1 undecidable manual P 342 7.0929 136 0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1212.EHE. ML:0.1 0.000019337161999999998 0.1408 AML other m 2017-04-16T19:48:03.72
IV.T1212.HNE. ML:0.7 0.00008579394 0.6656 AML other m 2017-04-16T19:48:03.39
IV.T1214.EHN. ML:0.0 0.000050831535 0.1024 AML other m 2017-04-16T19:48:03.14
IV.T1245.HHN. ML:0.1 0.000018925870000000002 0.1792 AML other m 2017-04-16T19:48:05.63
IV.T1245.HHE. ML:0.1 0.000021514629 0.1408 AML other m 2017-04-16T19:48:05.34
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