Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 31-12-2016 and time 18:03:00 (UTC) in region 6 km NW Accumoli (RI)

A magnitude ML 1.6 earthquake occured in region: 6 km NW Accumoli (RI), on

  • 31-12-2016 18:03:00 (UTC)
  • 31-12-2016 19:03:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7290, 13.1920 at 11 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
Accumoli RI 6 667 667
Arquata del Tronto AP 10 1178 1845
Norcia PG 11 4957 6802
Cittareale RI 13 482 7284
Amatrice RI 14 2657 9941
Cascia PG 15 3217 13158
Montegallo AP 17 523 13681
Acquasanta Terme AP 18 2916 16597
Castelsantangelo sul Nera MC 19 281 16878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
48 Km E of Terni (111501 inhabitants)
78 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km W of Chieti (51815 inhabitants)
91 Km NE of Tivoli (56533 inhabitants)
95 Km E of Viterbo (67173 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 1.6 2016-12-31
18:03:00		 42.7288 13.192 11 2016-12-31
18:27:13		 Sala Sismica INGV-Roma 38159851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-12-31 18:03:00 ± 0.04
Latitude 42.7288 ± 0.0027
Longitude 13.1920 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 38159851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 353
Semi-minor axis of confidence ellipse (meter) 216
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 49
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) 0.60344
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 25
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 13
Type of magnitude ML
Reference to an origin 38159851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-12-31 18:27:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2016-12-31T18:03:32.87 3.0 undecidable manual S -2.44 0
IV.SNTG.HHZ. 2016-12-31T18:03:20.40 0.1 undecidable manual S 341 61.7937 50 0.56 80
IV.ASSB.HHZ. 2016-12-31T18:03:18.55 0.1 undecidable manual S 309 55.5999 50 0.38 85
IV.T1220.EHZ. 2016-12-31T18:03:15.08 0.1 undecidable manual S 349 43.1235 50 0.24 89
IV.GIGS.HHZ. 2016-12-31T18:03:14.79 0.1 undecidable manual S 134 43.623 50 -0.19 89
IV.CESI.HHZ. 2016-12-31T18:03:13.84 0.1 undecidable manual S 323 38.5281 50 0.23 90
IV.T1219.EHZ. 2016-12-31T18:03:13.74 0.1 undecidable manual S 337 39.3273 50 -0.09 92
IV.FDMO.HHZ. 2016-12-31T18:03:12.83 0.1 undecidable manual S 346 35.1426 50 0.11 93
IV.TERO.HHZ. 2016-12-31T18:03:12.72 0.1 undecidable manual S 109 35.6421 50 -0.11 92
IV.EL6.EHZ. 2016-12-31T18:03:12.83 0.1 undecidable manual P 354 66.9774 50 0.23 85
IV.T1256.HHZ. 2016-12-31T18:03:12.00 0.1 undecidable manual S 5 30.9468 50 0.42 88
IV.T1211.EHZ. 2016-12-31T18:03:12.97 0.1 undecidable manual S 232 35.0427 50 0.28 90
IV.ASSB.HHZ. 2016-12-31T18:03:11.76 0.1 undecidable manual P 309 55.5999 50 0.93 69
IV.SNTG.HHZ. 2016-12-31T18:03:11.76 0.1 undecidable manual P 341 61.7937 50 -0.03 90
IV.T1215.EHZ. 2016-12-31T18:03:10.27 0.1 undecidable manual S 287 27.5502 50 -0.42 87
IV.RM33.EHZ. 2016-12-31T18:03:09.61 0.1 undecidable manual S 176 24.4533 50 -0.25 91
IV.MC2.EHZ. 2016-12-31T18:03:09.25 0.1 undecidable manual S 359 20.2686 50 0.51 87
IV.MMO1.EHZ. 2016-12-31T18:03:09.00 0.1 undecidable manual S 30 21.867 50 -0.17 94
IV.T1216.EHZ. 2016-12-31T18:03:09.13 0.1 undecidable manual S 322 22.8549 50 -0.29 91
IV.CESI.HHZ. 2016-12-31T18:03:08.12 0.1 undecidable manual P 323 38.5281 50 -0.08 92
IV.T1219.EHZ. 2016-12-31T18:03:08.21 0.1 undecidable manual P 337 39.3273 50 -0.12 92
IV.T1243.HHZ. 2016-12-31T18:03:08.61 0.1 undecidable manual S 100 21.1677 50 -0.38 89
IV.GIGS.HHZ. 2016-12-31T18:03:08.87 0.1 undecidable manual P 134 43.623 50 -0.12 91
IV.SMA1.EHZ. 2016-12-31T18:03:08.02 0.1 undecidable manual S 133 15.9729 124 0.52 87
IV.T1220.EHZ. 2016-12-31T18:03:08.89 0.1 undecidable manual P 349 43.1235 50 -0.02 93
IV.LNSS.HHZ. 2016-12-31T18:03:08.38 0.1 undecidable manual S 222 18.6702 120 0.09 96
IV.T1211.EHZ. 2016-12-31T18:03:07.53 0.1 undecidable manual P 232 35.0427 50 -0.14 92
IV.FDMO.HHZ. 2016-12-31T18:03:07.44 0.1 undecidable manual P 346 35.1426 50 -0.24 90
IV.TERO.HHZ. 2016-12-31T18:03:07.54 0.1 undecidable manual P 109 35.6421 50 -0.21 90
IV.T1256.HHZ. 2016-12-31T18:03:06.84 0.1 undecidable manual P 5 30.9468 50 -0.19 92
IV.T1245.HHZ. 2016-12-31T18:03:06.88 0.1 undecidable manual S 359 14.1747 127 -0.11 97
IV.T1299.EHZ. 2016-12-31T18:03:06.95 0.1 undecidable manual S 145 12.7761 130 0.33 92
IV.T1212.EHZ. 2016-12-31T18:03:06.09 0.1 undecidable manual S 282 12.2766 131 -0.39 92
IV.T1215.EHZ. 2016-12-31T18:03:06.39 0.1 undecidable manual P 287 27.5502 50 -0.12 93
IV.NRCA.HNZ. 2016-12-31T18:03:06.20 0.1 undecidable manual S 331 13.1757 129 -0.53 89
IV.MMO1.EHZ. 2016-12-31T18:03:05.55 0.1 undecidable manual P 30 21.867 50 -0.08 95
IV.T1216.EHZ. 2016-12-31T18:03:05.69 0.1 undecidable manual P 322 22.8549 50 -0.09 95
IV.LNSS.HHZ. 2016-12-31T18:03:05.07 0.1 undecidable manual P 222 18.6702 120 -0.06 96
IV.T1218.EHZ. 2016-12-31T18:03:05.78 0.1 undecidable manual S 224 9.0798 140 0.09 97
IV.RM33.EHZ. 2016-12-31T18:03:05.95 0.1 undecidable manual P 176 24.4533 50 -0.09 94
IV.MC2.EHZ. 2016-12-31T18:03:05.42 0.1 positive manual P 359 20.2686 50 0.04 96
IV.T1243.HHZ. 2016-12-31T18:03:05.45 0.1 undecidable manual P 100 21.1677 50 -0.08 95
IV.T1212.EHZ. 2016-12-31T18:03:04.03 0.1 undecidable manual P 282 12.2766 131 -0.05 98
IV.SMA1.EHZ. 2016-12-31T18:03:04.98 0.1 undecidable manual P 133 15.9729 124 0.31 92
IV.T1214.EHZ. 2016-12-31T18:03:04.26 0.1 undecidable manual S 22 3.6963 161 -0.5 91
IV.NRCA.HNZ. 2016-12-31T18:03:04.16 0.1 positive manual P 331 13.1757 129 -0.07 98
IV.T1245.HHZ. 2016-12-31T18:03:04.35 0.1 undecidable manual P 359 14.1747 127 -0.02 98
IV.T1299.EHZ. 2016-12-31T18:03:04.44 0.1 undecidable manual P 145 12.7761 130 0.28 93
IV.T1214.EHZ. 2016-12-31T18:03:03.06 0.1 undecidable manual P 22 3.6963 161 -0.03 100
IV.T1218.EHZ. 2016-12-31T18:03:03.77 0.1 undecidable manual P 224 9.0798 140 0.14 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.4 0.0000889 0.58 AML other m 2016-12-31T18:03:14.17
IV.CESI.HHE. ML:1.2 0.00004885 0.42 AML other m 2016-12-31T18:03:14.46
IV.FDMO.HHE. ML:1.1 0.000052 0.42 AML other m 2016-12-31T18:03:14.29
IV.FDMO.HHN. ML:1.2 0.0000579 0.84 AML other m 2016-12-31T18:03:14.68
IV.LNSS.HHN. ML:1.8 0.0004515 0.1 AML other m 2016-12-31T18:03:08.78
IV.LNSS.HHE. ML:1.5 0.000232 0.98 AML other m 2016-12-31T18:03:10.69
IV.NRCA.HNE. ML:2.4 0.0025 0.14 AML other m 2016-12-31T18:03:06.49
IV.NRCA.HHE. ML:2.4 0.00269 0.14 AML other m 2016-12-31T18:03:06.49
IV.NRCA.HNN. ML:2.0 0.000988 0.08 AML other m 2016-12-31T18:03:06.28
IV.NRCA.HHN. ML:2.0 0.001125 0.1 AML other m 2016-12-31T18:03:06.27
IV.RM33.EHN. ML:1.1 0.00008135000000000001 0.92 AML other m 2016-12-31T18:03:10.72
IV.RM33.EHE. ML:1.2 0.0000896 0.42 AML other m 2016-12-31T18:03:11.47
IV.SMA1.EHE. ML:1.3 0.0001785 0.7 AML other m 2016-12-31T18:03:09.07
IV.SMA1.EHN. ML:1.3 0.0001655 0.6 AML other m 2016-12-31T18:03:12.24
IV.T1211.EHE. ML:1.3 0.00007875 0.56 AML other m 2016-12-31T18:03:13.03
IV.T1211.EHN. ML:1.4 0.00010630000000000001 0.4 AML other m 2016-12-31T18:03:14.04
IV.T1212.EHN. ML:1.4 0.00024 0.48 AML other m 2016-12-31T18:03:06.53
IV.T1212.EHE. ML:1.3 0.00022349999999999998 0.26 AML other m 2016-12-31T18:03:06.47
IV.T1214.EHE. ML:1.6 0.0006274999999999999 0.16 AML other m 2016-12-31T18:03:04.62
IV.T1214.HNE. ML:1.6 0.0006795 0.78 AML other m 2016-12-31T18:03:04.62
IV.T1214.EHN. ML:1.7 0.0009270000000000001 0.22 AML other m 2016-12-31T18:03:04.39
IV.T1214.HNN. ML:1.8 0.0009795000000000001 0.22 AML other m 2016-12-31T18:03:04.39
IV.T1218.EHN. ML:2.6 0.00557 0.16 AML other m 2016-12-31T18:03:05.87
IV.T1218.HNN. ML:2.6 0.005625 0.18 AML other m 2016-12-31T18:03:05.86
IV.T1218.EHE. ML:2.2 0.002165 0.18 AML other m 2016-12-31T18:03:05.81
IV.T1218.HNE. ML:2.3 0.0023 0.16 AML other m 2016-12-31T18:03:05.81
IV.T1219.EHN. ML:1.6 0.0001225 0.26 AML other m 2016-12-31T18:03:14.13
IV.T1219.EHE. ML:1.4 0.00008085 0.52 AML other m 2016-12-31T18:03:14.08
IV.T1245.HNN. ML:1.9 0.000751 0.9 AML other m 2016-12-31T18:03:07.91
IV.T1245.HHE. ML:1.6 0.00042699999999999997 0.7 AML other m 2016-12-31T18:03:08.91
IV.T1245.HNE. ML:1.6 0.00040649999999999996 0.4 AML other m 2016-12-31T18:03:07.20
IV.T1245.HHN. ML:1.8 0.000676 0.88 AML other m 2016-12-31T18:03:07.90
IV.T1299.EHE. ML:1.0 0.00010635 1.36 AML other m 2016-12-31T18:03:07.29
IV.T1299.EHN. ML:1.1 0.00014399999999999998 0.66 AML other m 2016-12-31T18:03:07.01
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