Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 31-10-2016 and time 23:20:41 (UTC) in region 4 km SE Preci (PG)

A magnitude ML 2.0 earthquake occured in region: 4 km SE Preci (PG), on

  • 31-10-2016 23:20:41 (UTC)
  • 01-11-2016 00:20:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8560, 13.0840 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
Preci PG 5 724 724
Norcia PG 7 4957 5681
Castelsantangelo sul Nera MC 7 281 5962
Visso MC 9 1107 7069
Ussita MC 11 444 7513
Sellano PG 13 1079 8592
Cerreto di Spoleto PG 14 1075 9667
Cascia PG 16 3217 12884
Monte Cavallo MC 17 145 13029
Bolognola MC 20 142 13171
Arquata del Tronto AP 20 1178 14349
Poggiodomo PG 20 117 14466

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
63 Km E of Perugia (166134 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
99 Km NE of Guidonia Montecelio (88673 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 2.0 2016-10-31
23:20:41		 42.8557 13.0835 11 2019-02-12
14:03:42		 Bollettino Sismico Italiano INGV 55873171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 23:20:41 ± 0.04
Latitude 42.8557 ± 0.0027
Longitude 13.0835 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 55873171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 321
Semi-minor axis of confidence ellipse (meter) 227
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 330
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.4
Num. used stations 16
Type of magnitude ML
Reference to an origin 55873171
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-04-20 14:25:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHN. 2016-10-31T23:20:54.40 0.6 undecidable manual S 301 40.2264 50 0.05 48
IV.T1243.HHZ. 2016-10-31T23:20:52.78 0.6 undecidable manual S 121 34.5432 50 -0.05 48
IV.GUMA.HNN. 2016-10-31T23:20:52.33 0.3 undecidable manual S 42 30.747 50 0.51 66
IV.T1241.HNN. 2016-10-31T23:20:51.11 0.6 undecidable manual S 90 28.2495 50 -0.05 49
XO.AM05.EHZ. 2016-10-31T23:20:50.29 0.6 undecidable manual S 58 25.752 50 -0.18 48
IV.MMO1.EHZ. 2016-10-31T23:20:48.72 0.6 undecidable manual S 76 20.3685 117 -0.27 47
IV.T1256.HHZ. 2016-10-31T23:20:48.81 0.6 undecidable manual S 35 20.3685 117 -0.17 48
IV.T1217.HNZ. 2016-10-31T23:20:48.87 0.6 undecidable manual S 218 20.1687 118 -0.07 49
IV.ASSB.HHN. 2016-10-31T23:20:48.57 0.3 undecidable manual P 301 40.2264 50 -0.15 70
IV.T1215.EHZ. 2016-10-31T23:20:48.26 0.6 undecidable manual S 251 18.4704 120 -0.16 49
IV.FDMO.HHN. 2016-10-31T23:20:48.50 0.6 undecidable manual S 1 20.0688 118 -0.4 46
IV.GUMA.HNN. 2016-10-31T23:20:47.39 0.1 undecidable manual P 42 30.747 50 0.13 96
IV.T1243.HHZ. 2016-10-31T23:20:47.77 0.3 undecidable manual P 121 34.5432 50 -0.07 72
IV.FEMA.HNZ. 2016-10-31T23:20:46.54 0.6 undecidable manual S 347 12.1767 131 -0.07 50
XO.AM05.EHZ. 2016-10-31T23:20:46.41 0.3 undecidable manual P 58 25.752 50 -0.08 73
IV.T1241.HNN. 2016-10-31T23:20:46.68 0.1 undecidable manual P 90 28.2495 50 -0.2 95
IV.T1216.EHZ. 2016-10-31T23:20:45.30 0.6 undecidable manual S 307 6.4935 148 -0.04 51
IV.T1215.EHZ. 2016-10-31T23:20:45.31 0.1 undecidable manual P 251 18.4704 120 0.02 100
IV.FDMO.HHN. 2016-10-31T23:20:45.50 0.3 undecidable manual P 1 20.0688 118 -0.07 74
IV.T1245.HNZ. 2016-10-31T23:20:45.93 0.6 undecidable manual S 89 8.4804 141 0.2 49
IV.MMO1.EHZ. 2016-10-31T23:20:45.55 0.1 positive manual P 76 20.3685 117 -0.08 98
IV.T1256.HHZ. 2016-10-31T23:20:45.65 0.3 undecidable manual P 35 20.3685 117 0.03 75
IV.T1217.HNZ. 2016-10-31T23:20:45.65 0.3 undecidable manual P 218 20.1687 118 0.05 74
IV.T1245.HNZ. 2016-10-31T23:20:44.01 0.1 undecidable manual P 89 8.4804 141 0.26 97
IV.FEMA.HNZ. 2016-10-31T23:20:44.39 0.1 undecidable manual P 347 12.1767 131 0.14 99
IV.T1216.EHZ. 2016-10-31T23:20:43.70 0.1 positive manual P 307 6.4935 148 0.19 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1216.EHN. ML:2.4 0.003724488 0.1792 AML other m 2016-10-31T23:20:45.41
IV.T1216.EHE. ML:2.2 0.00222400915 0.1536 AML other m 2016-10-31T23:20:45.69
IV.T1245.HHE. ML:2.2 0.0020942945 0.1408 AML other m 2016-10-31T23:20:46.06
IV.T1245.HHN. ML:2.3 0.0029971424999999997 0.1664 AML other m 2016-10-31T23:20:46.43
IV.T1245.HNE. ML:2.2 0.0021605455 0.1408 AML other m 2016-10-31T23:20:46.06
IV.T1245.HNN. ML:2.4 0.003155242 0.1536 AML other m 2016-10-31T23:20:46.42
IV.FEMA.HNE. ML:2.2 0.001764779 0.1408 AML other m 2016-10-31T23:20:46.74
IV.FEMA.HNN. ML:2.2 0.0019313960000000002 0.1152 AML other m 2016-10-31T23:20:46.91
IV.T1215.EHE. ML:1.4 0.00019683099999999999 0.1024 AML other m 2016-10-31T23:20:48.59
IV.T1215.EHN. ML:1.6 0.0002855445 0.0896 AML other m 2016-10-31T23:20:48.51
IV.T1215.HNE. ML:1.4 0.00019330322 0.1024 AML other m 2016-10-31T23:20:48.59
IV.T1215.HNN. ML:1.6 0.00030018754999999996 0.0896 AML other m 2016-10-31T23:20:48.51
XO.AM05.HNE. ML:1.5 0.000193135995 0.1024 AML other m 2016-10-31T23:20:51.44
XO.AM05.HNN. ML:1.8 0.00032169210000000003 0.0768 AML other m 2016-10-31T23:20:50.64
XO.AM05.EHN. ML:1.4 0.00013028197 0.0768 AML other m 2016-10-31T23:20:50.62
XO.AM05.EHE. ML:2.2 0.0008822322499999999 0.0768 AML other m 2016-10-31T23:20:50.47
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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