Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 18-10-2016 and time 09:32:55 (UTC) in region 4 km NW Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 4 km NW Norcia (PG), on

  • 18-10-2016 09:32:55 (UTC)
  • 18-10-2016 11:32:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8220, 13.0620 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 4 4957 4957
Preci PG 7 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cerreto di Spoleto PG 12 1075 7037
Cascia PG 12 3217 10254
Visso MC 12 1107 11361
Sellano PG 13 1079 12440
Ussita MC 15 444 12884
Poggiodomo PG 16 117 13001
Vallo di Nera PG 17 364 13365
Monte Cavallo MC 20 145 13510
Arquata del Tronto AP 20 1178 14688

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
56 Km W of Teramo (54892 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
63 Km SE of Perugia (166134 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
98 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 0.9 2016-10-18
09:32:55		 42.8225 13.0623 8 2016-10-18
09:42:05		 Sala Sismica INGV-Roma 30328041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-18 09:32:55 ± 0.22
Latitude 42.8225 ± 0.0126
Longitude 13.0623 ± 0.0135
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 30328041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1577
Semi-minor axis of confidence ellipse (meter) 719
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 328
Circular confidence region, given by single value of horizontal uncertainty (meter) 1580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.44516
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 30328041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-18 09:42:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2016-10-18T09:33:12.07 0.3 undecidable manual S 116 49.4172 50 0.08 70
IV.T1243.HHZ. 2016-10-18T09:33:07.52 0.1 undecidable manual S 114 34.4433 50 -0.47 88
IV.TERO.HHZ. 2016-10-18T09:33:05.86 1.0 negative manual P 116 49.4172 50 0.73 19
IV.T1217.EHZ. 2016-10-18T09:33:02.24 0.1 undecidable manual S 221 16.2726 117 0.12 98
IV.T1243.HHZ. 2016-10-18T09:33:02.73 1.0 negative manual P 114 34.4433 50 -0.09 24
IV.T1202.EHZ. 2016-10-18T09:33:00.26 0.3 undecidable manual P 135 18.6702 114 0.39 69
IV.T1245.HHZ. 2016-10-18T09:33:00.98 0.1 undecidable manual S 70 10.878 128 0.44 92
IV.T1217.EHZ. 2016-10-18T09:32:59.42 0.1 undecidable manual P 221 16.2726 117 -0.01 100
IV.MC2.EHZ. 2016-10-18T09:32:59.92 0.6 negative manual P 46 14.2746 121 0.84 39
IV.NRCA.HHZ. 2016-10-18T09:32:58.46 0.1 undecidable manual S 74 4.3956 152 -0.6 88
IV.T1245.HHZ. 2016-10-18T09:32:58.57 0.1 undecidable manual P 70 10.878 128 0.05 100
IV.T1216.EHZ. 2016-10-18T09:32:57.99 0.1 undecidable manual P 335 8.3805 135 -0.15 98
IV.NRCA.HHZ. 2016-10-18T09:32:57.41 0.1 positive manual P 74 4.3956 152 -0.26 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1216.EHN. ML:1.0 0.00015375 0.44 AML other m 2016-10-18T09:33:00.66
IV.T1216.EHE. ML:0.9 0.000131 1.14 AML other m 2016-10-18T09:33:02.70
IV.T1245.HHN. ML:0.9 0.0001175 1.14 AML other m 2016-10-18T09:33:02.22
IV.T1245.HHE. ML:0.8 0.00008669999999999999 0.22 AML other m 2016-10-18T09:33:01.69
IV.TERO.HHE. ML:0.8 0.000014999999999999999 1.34 AML other m 2016-10-18T09:33:59.83
IV.TERO.HHN. ML:1.0 0.00002845 0.08 AML other m 2016-10-18T09:33:59.78
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