Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 31-10-2016 and time 04:44:19 (UTC) in region 2 km W Arquata del Tronto (AP)

A magnitude ML 2.0 earthquake occured in region: 2 km W Arquata del Tronto (AP), on

  • 31-10-2016 04:44:19 (UTC)
  • 31-10-2016 05:44:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7700, 13.2690 at 8 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
Arquata del Tronto AP 2 1178 1178
Accumoli RI 8 667 1845
Montegallo AP 10 523 2368
Acquasanta Terme AP 12 2916 5284
Norcia PG 15 4957 10241
Montemonaco AP 15 604 10845
Amatrice RI 16 2657 13502
Castelsantangelo sul Nera MC 17 281 13783
Cittareale RI 19 482 14265
Valle Castellana TE 19 977 15242
Roccafluvione AP 20 2010 17252

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Teramo (54892 inhabitants)
48 Km N of L'Aquila (69753 inhabitants)
51 Km E of Foligno (57155 inhabitants)
56 Km E of Terni (111501 inhabitants)
77 Km W of Montesilvano (53738 inhabitants)
81 Km E of Perugia (166134 inhabitants)
84 Km W of Pescara (121014 inhabitants)
87 Km NW of Chieti (51815 inhabitants)
96 Km S of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 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 2.0 2016-10-31
04:44:19		 42.77 13.2693 8 2019-02-12
14:03:27		 Bollettino Sismico Italiano INGV 51156671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 04:44:19 ± 0.08
Latitude 42.7700 ± 0.0036
Longitude 13.2693 ± 0.0074
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 51156671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 431
Semi-minor axis of confidence ellipse (meter) 396
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 98
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.65650
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 18
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 33
Type of magnitude ML
Reference to an origin 51156671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-10-20 11:02:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2016-10-31T04:44:51.92 3.0 undecidable manual S 0
IV.LIK.EHZ.01 2016-10-31T04:44:46.65 3.0 negative manual P 2.66 0
IV.T0110.HHZ. 2016-10-31T04:44:43.10 0.6 undecidable manual S 145 72.8715 50 0.45 42
IV.EL6.EHZ. 2016-10-31T04:44:40.70 0.6 undecidable manual S 348 63.492 50 0.55 41
IV.GIUL.HHZ. 2016-10-31T04:44:40.16 3.0 positive manual P -2.8 0
IV.VCEL.EHZ. 2016-10-31T04:44:40.60 1.0 undecidable manual S 132 62.493 50 0.71 19
IV.ASSB.HHZ. 2016-10-31T04:44:38.43 3.0 undecidable manual P 0
IV.OFFI.HHZ. 2016-10-31T04:44:33.70 1.0 undecidable manual S 61 38.5281 50 0.23 23
IV.T0110.HHZ. 2016-10-31T04:44:32.73 0.3 undecidable manual P 145 72.8715 50 -0.33 64
IV.GUMA.HNN. 2016-10-31T04:44:32.00 0.6 undecidable manual S 9 32.9448 103 0.33 46
IV.VCEL.EHZ. 2016-10-31T04:44:31.45 0.3 undecidable manual P 132 62.493 50 -0.01 70
IV.MGAB.HHZ. 2016-10-31T04:44:31.21 3.0 undecidable manual P 0
IV.EL6.EHZ. 2016-10-31T04:44:31.08 0.3 undecidable manual P 348 63.492 50 -0.53 62
IV.CESX.HHZ. 2016-10-31T04:44:30.53 0.6 positive manual P 252 58.497 50 -0.31 44
IV.TERO.HHZ. 2016-10-31T04:44:30.90 0.3 undecidable manual S 121 31.746 103 -0.39 68
IV.T1215.EHZ. 2016-10-31T04:44:30.28 3.0 undecidable manual P 0
IV.T1246.HHZ. 2016-10-31T04:44:29.60 0.6 undecidable manual S 139 27.5502 105 -0.28 47
IV.LNSS.HHZ. 2016-10-31T04:44:29.50 0.6 undecidable manual S 225 26.3514 106 0.05 49
IV.OFFI.HHZ. 2016-10-31T04:44:28.05 0.3 undecidable manual P 61 38.5281 50 0.3 69
IV.MNTP.HNZ. 2016-10-31T04:44:28.70 0.6 undecidable manual P 22 43.8228 50 0.12 47
XO.AM05.HNZ. 2016-10-31T04:44:28.90 0.6 undecidable manual S 16 23.9538 107 0.22 48
IV.T1217.EHZ. 2016-10-31T04:44:27.04 3.0 undecidable manual P 0
IV.T1241.EHZ. 2016-10-31T04:44:26.30 0.3 undecidable manual S 54 16.2726 115 0.12 74
IV.GUMA.HNN. 2016-10-31T04:44:26.50 0.3 undecidable manual P 9 32.9448 103 -0.22 71
IV.T1243.HHZ. 2016-10-31T04:44:26.40 0.6 undecidable manual S 119 16.6722 114 0.09 50
IV.TERO.HHZ. 2016-10-31T04:44:26.12 0.3 undecidable manual P 121 31.746 103 -0.38 68
IV.LNSS.HHZ. 2016-10-31T04:44:25.47 0.6 undecidable manual P 225 26.3514 106 0.03 50
IV.T1204.EHZ. 2016-10-31T04:44:25.20 0.3 undecidable manual S 160 11.0778 124 0.59 67
IV.T1299.HNZ. 2016-10-31T04:44:25.60 0.6 undecidable manual S 176 15.0738 117 -0.21 49
IV.RM33.EHZ. 2016-10-31T04:44:25.49 0.1 undecidable manual P 189 29.3484 104 -0.52 88
IV.MMO1.HNZ. 2016-10-31T04:44:25.50 0.3 undecidable manual S 18 15.0738 117 -0.31 72
IV.T1246.HHZ. 2016-10-31T04:44:24.93 0.3 undecidable manual P 139 27.5502 105 -0.75 61
XO.AM05.HNZ. 2016-10-31T04:44:24.84 0.6 undecidable manual P 16 23.9538 107 -0.15 49
IV.T1204.EHZ. 2016-10-31T04:44:23.01 0.1 positive manual P 160 11.0778 124 0.37 95
IV.T1243.HHZ. 2016-10-31T04:44:23.72 0.1 undecidable manual P 119 16.6722 114 0.1 99
IV.T1299.HNZ. 2016-10-31T04:44:23.64 0.3 undecidable manual P 176 15.0738 117 0.31 72
IV.MMO1.HNZ. 2016-10-31T04:44:23.25 0.1 undecidable manual P 18 15.0738 117 -0.08 100
IV.T1241.EHZ. 2016-10-31T04:44:23.70 0.3 undecidable manual P 54 16.2726 115 0.15 74
IV.T1201.HNZ. 2016-10-31T04:44:23.33 0.1 undecidable manual P 187 12.5763 121 0.44 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T0110.HHN. ML:2.1 0.00019428705 0.4 AML other m 2016-10-31T04:44:46.28
IV.T1204.EHE. ML:2.3 0.00255488405 0.1792 AML other m 2016-10-31T04:44:26.11
IV.T1241.HNE. ML:2.6 0.003787204 0.3392 AML other m 2016-10-31T04:44:26.91
IV.T1241.HNN. ML:2.2 0.0015566170000000002 0.2816 AML other m 2016-10-31T04:44:27.44
IV.T1241.EHE. ML:2.6 0.0037277965 0.3392 AML other m 2016-10-31T04:44:26.92
IV.T1241.EHN. ML:2.3 0.0017840935 0.2816 AML other m 2016-10-31T04:44:27.45
IV.RM33.HNE. ML:2.0 0.000544069 0.5408 AML other m 2016-10-31T04:44:36.93
IV.RM33.EHN. ML:1.9 0.0003918659 0.3776 AML other m 2016-10-31T04:44:31.07
IV.RM33.EHE. ML:2.0 0.000486442 0.4576 AML other m 2016-10-31T04:44:36.90
IV.RM33.HNN. ML:1.8 0.000353014405 0.3584 AML other m 2016-10-31T04:44:31.07
IV.LNSS.HHE. ML:1.9 0.0004727633 0.24 AML other m 2016-10-31T04:44:30.10
IV.LNSS.HHN. ML:2.2 0.00099793025 0.2784 AML other m 2016-10-31T04:44:30.02
IV.TERO.HNN. ML:2.1 0.00060288375 0.1184 AML other m 2016-10-31T04:44:31.32
IV.TERO.HHN. ML:2.2 0.0006734304 0.16 AML other m 2016-10-31T04:44:31.36
IV.TERO.HHE. ML:2.1 0.00056957435 0.0992 AML other m 2016-10-31T04:44:31.36
IV.TERO.HNE. ML:2.0 0.00049831325 0.1216 AML other m 2016-10-31T04:44:31.80
IV.T1217.EHE. ML:1.8 0.00031630730000000004 0.224 AML other m 2016-10-31T04:44:31.46
IV.T1217.HNE. ML:1.8 0.00036542605 0.208 AML other m 2016-10-31T04:44:31.46
IV.T1217.EHN. ML:1.9 0.00042852 0.224 AML other m 2016-10-31T04:44:31.47
IV.T1217.HNN. ML:2.0 0.00047044635 0.24 AML other m 2016-10-31T04:44:31.35
IV.OFFI.HHN. ML:2.2 0.00062972835 0.6624 AML other m 2016-10-31T04:44:43.27
IV.OFFI.HHE. ML:2.2 0.0006039915 0.4992 AML other m 2016-10-31T04:44:41.30
IV.CESX.HHE. ML:1.6 0.000129572285 0.1792 AML other m 2016-10-31T04:44:55.72
IV.CESX.HHN. ML:1.7 0.0001473582 0.4 AML other m 2016-10-31T04:44:48.40
IV.EL6.EHN. ML:2.0 0.00020088270000000001 0.4608 AML other m 2016-10-31T04:44:48.38
IV.VCEL.EHN. ML:2.0 0.00015834765 1.0176 AML other m 2016-10-31T04:45:01.60
IV.VCEL.EHE. ML:2.1 0.00024969685 0.3968 AML other m 2016-10-31T04:44:43.92
IV.T0110.HHE. ML:2.1 0.00019838355 0.3616 AML other m 2016-10-31T04:44:50.78
IV.MGAB.HHE. ML:1.9 0.000086548285 0.4384 AML other m 2016-10-31T04:44:56.14
IV.MGAB.HNE. ML:1.9 0.00008149987000000001 0.4576 AML other m 2016-10-31T04:44:53.38
IV.MGAB.HNN. ML:2.0 0.000121220215 0.3808 AML other m 2016-10-31T04:44:55.08
IV.MGAB.HHN. ML:2.1 0.0001316214 0.4 AML other m 2016-10-31T04:44:55.08
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