Earthquake with magnitude of Md 1.1 on date 17-09-2016 and time 04:33:31 (Italy) in region 5 km SW Norcia (PG)

A magnitude Md 1.1 earthquake occured in region: 5 km SW Norcia (PG), on

  • 17-09-2016 02:33:31 (UTC)
  • 17-09-2016 04:33:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.76, 13.05 at 0 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.

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 6 3217 8174
Poggiodomo PG 11 117 8291
Cerreto di Spoleto PG 12 1075 9366
Preci PG 13 724 10090
Monteleone di Spoleto PG 15 599 10689
Vallo di Nera PG 15 364 11053
Sellano PG 17 1079 12132
Castelsantangelo sul Nera MC 17 281 12413
Sant'Anatolia di Narco PG 18 564 12977
Accumoli RI 18 667 13644
Scheggino PG 19 461 14105
Cittareale RI 19 482 14587
Visso MC 19 1107 15694

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
55 Km W of Teramo (54892 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
86 Km E of Viterbo (67173 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km N of Tivoli (56533 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 Md 1.1 2016-09-17
02:33:31
42.76 13.05 0 2016-09-17
02:45:14
Sala Sismica INGV-Roma 29123131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-09-17 02:33:31 ± 0.47
Latitude 42.76 ± 0.03
Longitude 13.05 ± 0.02
Depth (km) 0 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 29123131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2910
Semi-minor axis of confidence ellipse (meter) 1580
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 170
Circular confidence region, given by single value of horizontal uncertainty (meter) 2910
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 2.7879
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 6
Magnitude information

Md:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 2
Type of magnitude Md
Reference to an origin 29123131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-09-17 02:45:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2016-09-17T02:34:14.99 3.0 undecidable manual Sg 7.98 0
IV.PTRJ.HNZ. 2016-09-17T02:34:13.78 3.0 undecidable manual Pg 17.51 0
IV.PAOL.HHZ. 2016-09-17T02:34:11.30 3.0 undecidable manual Pg 10.44 0
IV.MMUR.HNZ. 2016-09-17T02:34:06.99 3.0 undecidable manual Sg 2.7879 1.96 0
IV.APEC.HHZ. 2016-09-17T02:33:57.99 3.0 undecidable manual Sn -6.51 0
IV.LAV9.HHZ. 2016-09-17T02:33:52.70 3.0 negative manual Pn 0 0
IV.TRIV.HHZ. 2016-09-17T02:33:47.73 3.0 undecidable manual Pn -3.08 0
IV.MC2.EHZ. 2016-09-17T02:33:38.65 0.6 undecidable manual S 35 0.1799 91 0.38 57
IV.T1215.EHZ. 2016-09-17T02:33:36.86 0.6 undecidable manual S 286 0.1358 91 0.28 58
IV.T1242.HHZ. 2016-09-17T02:33:36.97 0.6 undecidable manual S 61 0.1322 92 0.54 55
IV.MC2.EHZ. 2016-09-17T02:33:36.68 0.3 positive manual P 35 0.1799 91 1.34 56
IV.MMO1.EHZ. 2016-09-17T02:33:36.40 0.3 undecidable manual P 57 0.2455 91 -0.39 84
IV.T1242.HHZ. 2016-09-17T02:33:34.71 0.3 undecidable manual P 61 0.1322 92 0.43 85
IV.ARVD.HHZ. 2016-09-17T02:33:34.10 3.0 negative manual Pg 6.34 0
IV.T1202.EHZ. 2016-09-17T02:33:34.35 0.6 undecidable manual P 115 0.1439 91 -0.19 59
CR.ZAG.BHZ. 2016-09-17T02:33:33.99 3.0 undecidable manual S -0.03 0
IV.T1215.EHZ. 2016-09-17T02:33:33.91 1.0 undecidable manual P 286 0.1358 91 -0.46 28
IV.NRCA.HHZ. 2016-09-17T02:33:33.66 0.6 undecidable manual S 35 0.0845 92 -0.94 47
IV.NRCA.HHZ. 2016-09-17T02:33:32.43 0.1 negative manual P 35 0.0845 92 -0.79 100
IV.CSP1.EHZ. 2016-09-17T02:33:32.92 3.0 undecidable manual Pn 0.19 0
IV.MMUR.HNZ. 2016-09-17T02:33:29.85 3.0 undecidable manual Pg 2.7879 1.47 0
IV.CPGN.EHZ. 2016-09-17T02:33:27.27 3.0 undecidable manual Pn 1.46 0
IV.BRES.EHZ. 2016-09-17T02:33:11.61 3.0 undecidable manual Pn 0.02 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHZ. Md:0.8 6 END duration s
IV.T1242.HHZ. Md:1.4 12 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download