Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 31-10-2016 and time 08:15:03 (UTC) in region 8 km E Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 8 km E Norcia (PG), on

  • 31-10-2016 08:15:03 (UTC)
  • 31-10-2016 09:15:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8200, 13.1830 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 8 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Arquata del Tronto AP 11 1178 6416
Montegallo AP 13 523 6939
Preci PG 13 724 7663
Ussita MC 14 444 8107
Visso MC 15 1107 9214
Accumoli RI 15 667 9881
Montemonaco AP 15 604 10485
Cascia PG 18 3217 13702
Montefortino FM 19 1178 14880
Acquasanta Terme AP 19 2916 17796
Bolognola MC 20 142 17938

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
52 Km NE of Terni (111501 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
93 Km W of Pescara (121014 inhabitants)
96 Km NW of Chieti (51815 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km E of Viterbo (67173 inhabitants)
100 Km NE 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
Bulletin
Rev1000 		ML 1.6 2016-10-31
08:15:03		 42.8197 13.1828 11 2019-02-12
14:03:38		 Bollettino Sismico Italiano INGV 54107741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 08:15:03 ± 0.05
Latitude 42.8197 ± 0.0018
Longitude 13.1828 ± 0.0037
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 54107741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 370
Semi-minor axis of confidence ellipse (meter) 130
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 245
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.46495
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 11
Type of magnitude ML
Reference to an origin 54107741
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-02-23 10:14:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHZ. 2016-10-31T08:15:43.99 3.0 undecidable manual S 0.64 0
IV.LAV9.HHZ. 2016-10-31T08:15:28.11 3.0 positive manual P 3.81 0
IV.PP3.HNZ. 2016-10-31T08:15:23.99 3.0 undecidable manual S -0.2 0
IV.GIGS.HHZ. 2016-10-31T08:15:19.26 0.6 undecidable manual S 142 51.6039 90 -0.52 44
IV.TERO.HHZ. 2016-10-31T08:15:16.76 0.6 undecidable manual S 122 40.626 90 -0.09 50
IV.CAMP.HHE. 2016-10-31T08:15:15.17 0.6 undecidable manual S 150 36.4413 90 -0.57 44
IV.T1215.HNZ. 2016-10-31T08:15:12.49 0.3 undecidable manual S 266 25.6521 90 -0.36 74
IV.T1217.HNZ. 2016-10-31T08:15:12.32 0.3 undecidable manual S 240 23.754 90 -0.01 79
IV.T1243.HHZ. 2016-10-31T08:15:12.69 0.3 undecidable manual S 122 25.5522 90 -0.14 76
IV.LNSS.HHZ. 2016-10-31T08:15:12.99 0.6 undecidable manual S 206 26.751 90 -0.14 51
IV.GIGS.HHZ. 2016-10-31T08:15:12.73 0.3 undecidable manual P 142 51.6039 90 -0.19 72
IV.T1241.HNZ. 2016-10-31T08:15:11.46 0.3 undecidable manual S 78 20.5683 90 -0.04 79
IV.ARRO.EHZ. 2016-10-31T08:15:11.97 0.3 undecidable manual P 232 43.2234 90 0.35 71
IV.T1256.HHZ. 2016-10-31T08:15:11.61 0.3 undecidable manual S 10 20.9679 90 0 78
IV.TERO.HHZ. 2016-10-31T08:15:11.13 0.1 negative manual P 122 40.626 90 -0.1 100
IV.CAMP.HHE. 2016-10-31T08:15:10.49 0.6 undecidable manual P 150 36.4413 90 -0.09 50
IV.T1204.EHZ. 2016-10-31T08:15:10.77 0.3 undecidable manual S 146 19.2696 90 -0.38 73
IV.RM33.HNE. 2016-10-31T08:15:10.64 0.1 undecidable manual P 176 34.5432 90 0.35 96
IV.LNSS.HHZ. 2016-10-31T08:15:09.07 0.3 undecidable manual P 206 26.751 90 -0.01 78
IV.T1215.HNZ. 2016-10-31T08:15:09.18 0.3 undecidable manual P 266 25.6521 90 0.26 74
IV.MMO1.HNZ. 2016-10-31T08:15:09.84 0.3 undecidable manual S 53 14.6742 90 -0.08 80
IV.T1243.HHZ. 2016-10-31T08:15:08.78 0.6 negative manual P 122 25.5522 90 -0.12 51
IV.T1201.HNN. 2016-10-31T08:15:08.22 0.1 undecidable manual P 163 18.87 90 0.36 99
IV.T1204.EHZ. 2016-10-31T08:15:08.14 0.3 undecidable manual P 146 19.2696 90 0.2 76
XO.AM05.HNZ. 2016-10-31T08:15:08.34 0.6 undecidable manual P 38 22.2555 90 -0.06 53
IV.T1241.HNZ. 2016-10-31T08:15:08.17 0.3 undecidable manual P 78 20.5683 90 0.03 79
IV.T1299.EHN. 2016-10-31T08:15:08.58 0.6 undecidable manual P 158 22.0668 90 0.21 51
IV.T1217.HNZ. 2016-10-31T08:15:08.63 0.3 undecidable manual P 240 23.754 90 0.01 79
IV.MMO1.HNZ. 2016-10-31T08:15:07.35 0.3 undecidable manual P 53 14.6742 90 0.13 78
IV.T1256.HHZ. 2016-10-31T08:15:07.94 0.6 undecidable manual P 10 20.9679 90 -0.26 51
IV.T1216.EHZ. 2016-10-31T08:15:07.35 0.6 undecidable manual P 301 15.4734 90 0 53
IV.T1245.HHZ. 2016-10-31T08:15:07.65 0.3 undecidable manual S 6 4.0959 153 0 81
IV.T1245.HHZ. 2016-10-31T08:15:06.05 0.3 undecidable manual P 6 4.0959 153 0.14 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:1.7 0.00015982599999999998 0.48 AML other m 2016-10-31T08:15:16.93
IV.T1204.EHN. ML:1.6 0.00026178565000000006 0.0832 AML other m 2016-10-31T08:15:10.84
IV.T1204.EHE. ML:1.7 0.00037887999999999995 0.0768 AML other m 2016-10-31T08:15:11.15
IV.T1217.EHE. ML:1.6 0.00025595899999999983 0.0832 AML other m 2016-10-31T08:15:12.70
IV.T1217.EHN. ML:1.5 0.00018095649999999997 0.128 AML other m 2016-10-31T08:15:13.71
IV.LNSS.HHE. ML:1.4 0.00011928365000000001 0.256 AML other m 2016-10-31T08:15:13.54
IV.LNSS.HHN. ML:1.8 0.0003761673 0.16 AML other m 2016-10-31T08:15:13.63
IV.T1215.EHN. ML:1.6 0.00020090425000000002 0.7872 AML other m 2016-10-31T08:15:12.54
IV.T1215.EHE. ML:1.4 0.00013993750000000006 2.88 AML other m 2016-10-31T08:15:13.39
IV.TERO.HNE. ML:1.6 0.00012640265000000002 3.1232 AML other m 2016-10-31T08:15:16.06
IV.TERO.HNN. ML:1.7 0.00016004390000000002 1.9392 AML other m 2016-10-31T08:15:15.96
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
Waveforms Seismic signals in miniseed + resp format Download