Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 31-12-2016 and time 19:12:52 (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 19:12:52 (UTC)
  • 31-12-2016 20:12:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7270, 13.1870 at 10 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 12 482 7284
Amatrice RI 14 2657 9941
Cascia PG 14 3217 13158
Montegallo AP 18 523 13681
Acquasanta Terme AP 19 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)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
91 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
19:12:52		 42.727 13.1872 10 2016-12-31
19:21:18		 Sala Sismica INGV-Roma 38162461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-12-31 19:12:52 ± 0.04
Latitude 42.7270 ± 0.0027
Longitude 13.1872 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 38162461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 299
Semi-minor axis of confidence ellipse (meter) 194
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39390
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 23
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 38162461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-12-31 19:21:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIAM.HHZ. 2016-12-31T19:13:09.02 3.0 undecidable manual S -0.56 0
IV.GIGS.HHZ. 2016-12-31T19:13:06.58 0.1 undecidable manual S 134 43.7229 50 -0.02 94
IV.T1219.EHZ. 2016-12-31T19:13:05.67 1.0 undecidable manual S 338 39.3273 50 0.25 23
IV.T1211.EHZ. 2016-12-31T19:13:04.58 0.1 undecidable manual S 232 34.6431 50 0.43 88
IV.TERO.HHZ. 2016-12-31T19:13:04.19 0.1 undecidable manual S 109 35.9418 50 -0.31 90
IV.T1215.EHZ. 2016-12-31T19:13:02.06 0.1 undecidable manual S 288 27.2505 50 -0.12 95
IV.T1256.HHZ. 2016-12-31T19:13:02.93 0.1 undecidable manual S 6 31.1466 50 -0.3 91
IV.CAMP.HHZ. 2016-12-31T19:13:02.19 0.1 undecidable manual S 139 27.8499 50 -0.17 94
IV.T1241.EHZ. 2016-12-31T19:13:01.38 0.1 undecidable manual S 54 24.5532 50 -0.07 96
IV.T1216.EHZ. 2016-12-31T19:13:01.03 0.1 undecidable manual S 323 22.755 50 0.05 97
IV.RM33.EHZ. 2016-12-31T19:13:01.30 0.1 undecidable manual S 175 24.2535 50 -0.1 96
IV.MC2.EHZ. 2016-12-31T19:13:00.75 0.1 undecidable manual S 0 20.4684 117 0.47 89
IV.GIGS.HHZ. 2016-12-31T19:13:00.64 0.1 undecidable manual P 134 43.7229 50 0.08 93
IV.MMO1.EHZ. 2016-12-31T19:13:00.62 0.1 undecidable manual S 31 22.2555 115 -0.22 94
IV.T1219.EHZ. 2016-12-31T19:13:00.30 0.1 undecidable manual P 338 39.3273 50 0.41 87
IV.T1220.EHZ. 2016-12-31T19:13:00.67 0.1 undecidable manual P 349 43.2234 50 0.19 91
IV.T1243.HHZ. 2016-12-31T19:13:00.30 0.1 undecidable manual S 99 21.5673 116 -0.33 92
IV.FDMO.HHZ. 2016-12-31T19:12:59.32 0.1 undecidable manual P 347 35.2425 50 0.07 94
IV.TERO.HHZ. 2016-12-31T19:12:59.05 0.1 undecidable manual P 109 35.9418 50 -0.3 90
IV.SMA1.EHZ. 2016-12-31T19:12:59.55 0.1 undecidable manual S 131 16.1727 123 0.57 87
IV.T1211.EHZ. 2016-12-31T19:12:59.04 0.1 undecidable manual P 232 34.6431 50 -0.11 94
IV.LNSS.HHZ. 2016-12-31T19:12:59.52 0.1 undecidable manual S 221 18.2706 120 -0.08 97
IV.CAMP.HHZ. 2016-12-31T19:12:58.42 0.1 undecidable manual P 139 27.8499 50 0.31 91
IV.T1245.HHZ. 2016-12-31T19:12:58.87 0.1 undecidable manual S 0 14.3745 126 0.39 92
IV.T1299.EHZ. 2016-12-31T19:12:58.47 0.1 undecidable manual S 143 12.876 129 0.41 92
IV.T1256.HHZ. 2016-12-31T19:12:58.68 0.1 undecidable manual P 6 31.1466 50 0.06 95
IV.NRCA.HHZ. 2016-12-31T19:12:58.13 0.1 undecidable manual S 333 13.2756 128 -0.02 99
IV.T1216.EHZ. 2016-12-31T19:12:57.26 0.1 undecidable manual P 323 22.755 50 -0.06 97
IV.T1243.HHZ. 2016-12-31T19:12:57.00 0.1 negative manual P 99 21.5673 116 -0.11 96
IV.RM33.EHZ. 2016-12-31T19:12:57.47 0.1 undecidable manual P 175 24.2535 50 -0.09 96
IV.MC2.EHZ. 2016-12-31T19:12:57.08 0.1 undecidable manual P 0 20.4684 117 0.16 95
IV.T1241.EHZ. 2016-12-31T19:12:57.55 0.1 positive manual P 54 24.5532 50 -0.05 97
IV.T1212.EHZ. 2016-12-31T19:12:57.44 0.1 undecidable manual S 283 11.877 131 -0.37 92
IV.T1215.EHZ. 2016-12-31T19:12:57.94 0.1 undecidable manual P 288 27.2505 50 -0.08 96
IV.LNSS.HHZ. 2016-12-31T19:12:56.60 0.1 positive manual P 221 18.2706 120 0.08 97
IV.T1218.EHZ. 2016-12-31T19:12:56.55 0.1 undecidable manual S 223 8.5803 140 -0.46 91
IV.T1245.HHZ. 2016-12-31T19:12:56.08 0.1 undecidable manual P 0 14.3745 126 0.21 95
IV.SMA1.EHZ. 2016-12-31T19:12:56.41 0.1 undecidable manual P 131 16.1727 123 0.24 94
IV.MMO1.EHZ. 2016-12-31T19:12:56.99 0.1 undecidable manual P 31 22.2555 115 -0.24 93
IV.T1212.EHZ. 2016-12-31T19:12:55.46 0.1 undecidable manual P 283 11.877 131 -0.03 99
IV.NRCA.HHZ. 2016-12-31T19:12:55.64 0.1 positive manual P 333 13.2756 128 -0.05 99
IV.T1218.EHZ. 2016-12-31T19:12:55.01 0.1 positive manual P 223 8.5803 140 -0.01 100
IV.T1299.EHZ. 2016-12-31T19:12:55.91 0.1 undecidable manual P 143 12.876 129 0.27 94
IV.T1214.EHZ. 2016-12-31T19:12:55.48 0.3 undecidable manual S 26 3.996 159 -0.71 63
IV.T1214.EHZ. 2016-12-31T19:12:54.21 1.0 undecidable manual P 26 3.996 159 -0.34 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.7 0.000406 0.52 AML other m 2016-12-31T19:12:59.99
IV.LNSS.HHN. ML:1.7 0.00041749999999999996 1.52 AML other m 2016-12-31T19:13:00.92
IV.NRCA.HNE. ML:1.6 0.0004595 0.58 AML other m 2016-12-31T19:12:58.58
IV.NRCA.HHN. ML:1.5 0.00033899999999999995 1 AML other m 2016-12-31T19:12:58.68
IV.NRCA.HHE. ML:1.7 0.00048699999999999997 0.12 AML other m 2016-12-31T19:13:00.52
IV.NRCA.HNN. ML:1.6 0.000374 1.02 AML other m 2016-12-31T19:12:58.18
IV.RM33.EHN. ML:1.4 0.000148 0.16 AML other m 2016-12-31T19:13:01.58
IV.RM33.EHE. ML:1.4 0.00015 0.16 AML other m 2016-12-31T19:13:01.99
IV.SMA1.EHN. ML:1.5 0.000296 0.36 AML other m 2016-12-31T19:12:59.62
IV.SMA1.EHE. ML:1.4 0.00022600000000000002 0.16 AML other m 2016-12-31T19:13:00.01
IV.T1211.EHE. ML:1.3 0.00008465 0.62 AML other m 2016-12-31T19:13:05.41
IV.T1211.EHN. ML:1.5 0.00012215000000000001 0.26 AML other m 2016-12-31T19:13:06.09
IV.T1212.EHE. ML:1.2 0.00019499999999999997 1.2 AML other m 2016-12-31T19:12:58.90
IV.T1212.EHN. ML:1.4 0.0002525 1.16 AML other m 2016-12-31T19:12:58.35
IV.T1214.EHN. ML:2.2 0.002895 0.6 AML other m 2016-12-31T19:12:55.27
IV.T1214.HNN. ML:2.2 0.003035 0.6 AML other m 2016-12-31T19:12:55.27
IV.T1214.EHE. ML:2.1 0.002005 0.9 AML other m 2016-12-31T19:12:55.95
IV.T1214.HNE. ML:2.1 0.00219 0.88 AML other m 2016-12-31T19:12:55.94
IV.T1216.EHE. ML:1.2 0.0000988 0.96 AML other m 2016-12-31T19:13:02.33
IV.T1216.EHN. ML:1.3 0.000129 1.4 AML other m 2016-12-31T19:13:03.16
IV.T1218.EHE. ML:1.9 0.0011725 0.18 AML other m 2016-12-31T19:12:56.89
IV.T1218.HNE. ML:2.0 0.0011995 0.18 AML other m 2016-12-31T19:12:56.89
IV.T1218.HNN. ML:1.8 0.0008375 0.6 AML other m 2016-12-31T19:12:57.58
IV.T1218.EHN. ML:1.8 0.000833 0.18 AML other m 2016-12-31T19:12:57.59
IV.T1220.EHN. ML:1.6 0.00011700000000000001 0.68 AML other m 2016-12-31T19:13:09.35
IV.T1220.EHE. ML:1.4 0.00008075 0.62 AML other m 2016-12-31T19:13:14.35
IV.T1241.EHN. ML:1.4 0.00013700000000000002 0.38 AML other m 2016-12-31T19:13:01.60
IV.T1241.EHE. ML:1.4 0.000139 1.22 AML other m 2016-12-31T19:13:02.74
IV.T1245.HNE. ML:1.5 0.000307 0.56 AML other m 2016-12-31T19:13:00.59
IV.T1245.HNN. ML:1.7 0.0004380000000000001 1.44 AML other m 2016-12-31T19:12:59.84
IV.T1245.HHN. ML:1.6 0.0003465 1.06 AML other m 2016-12-31T19:12:59.84
IV.T1245.HHE. ML:1.4 0.000261 0.54 AML other m 2016-12-31T19:13:00.59
IV.T1299.HNN. ML:2.7 0.005949999999999996 1.58 AML other m 2016-12-31T19:13:02.79
IV.T1299.EHE. ML:1.2 0.00015200000000000004 0.28 AML other m 2016-12-31T19:12:58.64
IV.T1299.EHN. ML:1.5 0.000313 0.3 AML other m 2016-12-31T19:12:58.57
IV.T1299.HNE. ML:2.7 0.005549999999999997 0.42 AML other m 2016-12-31T19:13:01.14
IV.TERO.HHE. ML:1.3 0.00007280000000000001 1.52 AML other m 2016-12-31T19:13:05.76
IV.TERO.HHN. ML:1.5 0.000113 0.46 AML other m 2016-12-31T19:13:06.84
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