Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 31-10-2016 and time 21:43:20 (UTC) in region 6 km W Accumoli (RI)

A magnitude ML 2.0 earthquake occured in region: 6 km W Accumoli (RI), on

  • 31-10-2016 21:43:20 (UTC)
  • 31-10-2016 22:43:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7170, 13.1840 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
Accumoli RI 6 667 667
Cittareale RI 11 482 1149
Arquata del Tronto AP 11 1178 2327
Norcia PG 11 4957 7284
Amatrice RI 13 2657 9941
Cascia PG 14 3217 13158
Montegallo AP 19 523 13681
Acquasanta Terme AP 19 2916 16597
Castelsantangelo sul Nera MC 20 281 16878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
44 Km NW of L'Aquila (69753 inhabitants)
47 Km E of Terni (111501 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
78 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
89 Km W of Pescara (121014 inhabitants)
90 Km NE of Tivoli (56533 inhabitants)
90 Km W of Chieti (51815 inhabitants)
94 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
Bulletin
Rev1000 		ML 2.0 2016-10-31
21:43:20		 42.7172 13.1842 11 2019-02-12
14:03:38		 Bollettino Sismico Italiano INGV 54107791
Reviewed
Rev100 		ML 2.0 2016-10-31
21:43:20		 42.7157 13.1832 10 2016-10-31
21:59:43		 Sala Sismica INGV-Roma 31336481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 21:43:20 ± 0.07
Latitude 42.7172 ± 0.0045
Longitude 13.1842 ± 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 54107791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 509
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 14
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.81029
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 31336481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-31 21:59:43

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 38
Type of magnitude ML
Reference to an origin 54107791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-02-23 10:17:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESX.HHZ. 2016-10-31T21:43:36.46 0.6 undecidable manual S 256 50.2164 50 0.47 42
IV.FIAM.HHZ. 2016-10-31T21:43:36.16 0.6 undecidable manual S 186 50.1165 50 0.18 45
IV.MGAB.HHZ. 2016-10-31T21:43:36.54 0.3 undecidable manual P 284 89.9433 50 1.14 44
IV.GIGS.HHZ. 2016-10-31T21:43:34.02 0.6 undecidable manual S 133 43.2234 50 -0.1 47
IV.T0110.HHZ. 2016-10-31T21:43:33.05 0.3 undecidable manual P 138 72.5718 50 0.31 63
IV.TERO.HHZ. 2016-10-31T21:43:32.00 0.3 undecidable manual S 107 35.8419 50 -0.15 70
IV.TRTR.HHZ. 2016-10-31T21:43:32.05 0.1 undecidable manual P 80 60.2952 50 1.21 60
IV.ARRO.EHZ. 2016-10-31T21:43:32.90 0.6 undecidable manual S 246 37.4292 50 0.31 45
IV.T1247.HHZ. 2016-10-31T21:43:31.12 0.6 undecidable manual S 163 31.9458 50 -0.01 48
IV.FAGN.HHZ. 2016-10-31T21:43:31.02 0.3 undecidable manual P 147 59.7957 50 0.26 65
IV.T1211.EHZ. 2016-10-31T21:43:31.84 0.6 undecidable manual S 233 33.744 50 0.24 46
IV.T1246.HHN. 2016-10-31T21:43:30.26 0.6 undecidable manual S 120 29.2485 50 -0.14 47
IV.T1221.HNE. 2016-10-31T21:43:30.98 0.6 undecidable manual S 300 31.746 50 -0.09 47
IV.OFFI.HHZ. 2016-10-31T21:43:29.66 0.1 undecidable manual P 59 47.4192 50 0.8 75
IV.CESX.HHZ. 2016-10-31T21:43:29.12 0.1 undecidable manual P 256 50.2164 50 -0.17 90
IV.T1241.HNN. 2016-10-31T21:43:29.12 0.6 undecidable manual S 52 25.3524 50 -0.24 47
IV.CAMP.HHZ. 2016-10-31T21:43:29.70 0.6 undecidable manual S 138 27.2505 50 -0.16 47
IV.FIAM.HHZ. 2016-10-31T21:43:29.26 0.3 undecidable manual P 186 50.1165 50 -0.01 70
IV.T1215.EHZ. 2016-10-31T21:43:29.76 0.3 undecidable manual S 290 27.3504 50 -0.14 71
IV.RM33.EHZ. 2016-10-31T21:43:28.55 0.6 undecidable manual S 174 23.2545 50 -0.25 47
IV.ARRO.EHZ. 2016-10-31T21:43:27.21 0.1 undecidable manual P 246 37.4292 50 -0.1 94
IV.T1243.HHZ. 2016-10-31T21:43:27.92 0.6 undecidable manual S 96 21.6672 50 -0.45 45
IV.GIGS.HHZ. 2016-10-31T21:43:27.99 0.3 undecidable manual P 133 43.2234 50 -0.21 68
IV.LNSS.HHZ. 2016-10-31T21:43:27.09 0.6 undecidable manual S 223 17.2716 50 -0.11 49
IV.T1247.HHZ. 2016-10-31T21:43:27.00 0.6 undecidable manual P 163 31.9458 50 0.53 43
IV.T1217.EHZ. 2016-10-31T21:43:27.83 0.3 undecidable manual S 268 20.6682 50 -0.27 70
IV.T1211.EHZ. 2016-10-31T21:43:26.61 0.1 undecidable manual P 233 33.744 50 -0.14 94
IV.SMA1.EHZ. 2016-10-31T21:43:26.89 0.6 undecidable manual S 128 15.6732 125 0.14 48
IV.TERO.HHZ. 2016-10-31T21:43:26.75 0.1 undecidable manual P 107 35.8419 50 -0.31 90
IV.T1221.HNE. 2016-10-31T21:43:26.29 0.3 undecidable manual P 300 31.746 50 -0.15 70
IV.CAMP.HHZ. 2016-10-31T21:43:25.77 0.1 undecidable manual P 138 27.2505 50 0.03 97
IV.T1299.HNN. 2016-10-31T21:43:25.97 0.6 undecidable manual S 139 12.1767 132 0.16 49
IV.T1204.EHZ. 2016-10-31T21:43:25.47 0.6 undecidable manual S 113 11.6772 133 -0.22 48
IV.T1215.EHZ. 2016-10-31T21:43:25.52 0.3 undecidable manual P 290 27.3504 50 -0.24 69
IV.T1246.HHN. 2016-10-31T21:43:25.84 0.1 undecidable manual P 120 29.2485 50 -0.21 93
IV.RM33.EHZ. 2016-10-31T21:43:25.00 0.1 undecidable manual P 174 23.2545 50 -0.13 96
IV.T1244.EHZ. 2016-10-31T21:43:25.13 0.6 undecidable manual S 64 10.2786 137 -0.2 48
IV.T1241.HNN. 2016-10-31T21:43:25.22 0.3 undecidable manual P 52 25.3524 50 -0.23 70
IV.LNSS.HHZ. 2016-10-31T21:43:24.15 0.1 undecidable manual P 223 17.2716 50 -0.06 98
IV.T1217.EHZ. 2016-10-31T21:43:24.48 0.1 undecidable manual P 268 20.6682 50 -0.25 94
IV.T1201.HNN. 2016-10-31T21:43:24.91 0.6 undecidable manual S 141 8.5803 142 -0.05 50
IV.T1243.HHZ. 2016-10-31T21:43:24.64 0.1 undecidable manual P 96 21.6672 50 -0.24 94
IV.SMA1.EHZ. 2016-10-31T21:43:24.21 0.1 undecidable manual P 128 15.6732 125 0.27 94
IV.T1244.EHZ. 2016-10-31T21:43:23.08 0.1 undecidable manual P 64 10.2786 137 -0.05 99
IV.T1299.HNN. 2016-10-31T21:43:23.49 0.1 undecidable manual P 139 12.1767 132 0.09 98
IV.T1204.EHZ. 2016-10-31T21:43:23.28 0.1 undecidable manual P 113 11.6772 133 -0.05 99
IV.T1201.HNN. 2016-10-31T21:43:22.95 0.1 undecidable manual P 141 8.5803 142 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1204.EHN. ML:2.0 0.0010922411 0.1792 AML other m 2016-10-31T21:43:25.63
IV.T1204.EHE. ML:2.4 0.002750114 0.128 AML other m 2016-10-31T21:43:26.01
IV.LNSS.HHE. ML:2.1 0.0010200386 0.192 AML other m 2016-10-31T21:43:27.28
IV.LNSS.HHN. ML:2.5 0.002599836 0.256 AML other m 2016-10-31T21:43:28.18
IV.T1217.EHE. ML:2.0 0.0007689535 0.1408 AML other m 2016-10-31T21:43:28.74
IV.T1217.EHN. ML:2.0 0.0007690350000000002 0.2688 AML other m 2016-10-31T21:43:29.59
IV.T1217.HNE. ML:2.0 0.0007822247 0.1408 AML other m 2016-10-31T21:43:28.74
IV.T1217.HNN. ML:2.0 0.0007598984 0.256 AML other m 2016-10-31T21:43:29.59
IV.RM33.HNE. ML:2.0 0.00069236665 0.1664 AML other m 2016-10-31T21:43:29.43
IV.RM33.EHE. ML:2.0 0.0006328711 0.1664 AML other m 2016-10-31T21:43:29.35
IV.RM33.EHN. ML:2.0 0.0006318121 0.2816 AML other m 2016-10-31T21:43:29.51
IV.RM33.HNN. ML:2.0 0.0006576317 0.2944 AML other m 2016-10-31T21:43:29.51
IV.CAMP.HHE. ML:1.7 0.00024538174999999996 0.32 AML other m 2016-10-31T21:43:29.86
IV.CAMP.HHN. ML:1.6 0.00022207930000000002 0.576 AML other m 2016-10-31T21:43:35.69
IV.T1211.EHN. ML:2.2 0.0007397696 0.2944 AML other m 2016-10-31T21:43:32.59
IV.T1211.HNN. ML:2.2 0.00068895615 0.2176 AML other m 2016-10-31T21:43:33.32
IV.T1211.HNE. ML:2.2 0.0006300576500000001 0.1792 AML other m 2016-10-31T21:43:32.96
IV.T1211.EHE. ML:2.2 0.0006067587 0.1664 AML other m 2016-10-31T21:43:33.05
IV.TERO.HNE. ML:2.0 0.0003565683 0.2048 AML other m 2016-10-31T21:43:32.17
IV.TERO.HHE. ML:2.0 0.0003702185 0.2048 AML other m 2016-10-31T21:43:32.06
IV.TERO.HNN. ML:2.2 0.000705615 0.1408 AML other m 2016-10-31T21:43:32.24
IV.TERO.HHN. ML:2.3 0.00078351125 0.1408 AML other m 2016-10-31T21:43:32.24
IV.T1247.HHE. ML:1.9 0.0003586335 0.3456 AML other m 2016-10-31T21:43:40.36
IV.T1247.HHN. ML:1.9 0.0003288854 0.1408 AML other m 2016-10-31T21:43:34.52
IV.ARRO.EHE. ML:2.0 0.0003746871 0.192 AML other m 2016-10-31T21:43:35.93
IV.ARRO.EHN. ML:2.0 0.00033494285000000004 0.1536 AML other m 2016-10-31T21:43:34.98
IV.GIGS.HHN. ML:1.4 0.00007149388 0.0768 AML other m 2016-10-31T21:43:34.86
IV.GIGS.HHE. ML:1.4 0.00007379458 0.1408 AML other m 2016-10-31T21:43:34.15
IV.CESX.HHN. ML:1.9 0.00020350404999999998 0.2432 AML other m 2016-10-31T21:43:39.44
IV.CESX.HHE. ML:1.9 0.00022685094999999998 0.32 AML other m 2016-10-31T21:43:37.33
IV.FIAM.HHN. ML:1.5 0.00007709791499999999 0.5248 AML other m 2016-10-31T21:43:47.11
IV.FIAM.HHE. ML:1.5 0.00008936044500000001 0.5632 AML other m 2016-10-31T21:43:42.62
IV.FAGN.HHE. ML:2.0 0.00023205115000000002 0.3584 AML other m 2016-10-31T21:43:44.12
IV.FAGN.HHN. ML:2.0 0.00018743595 0.512 AML other m 2016-10-31T21:43:41.40
IV.VCEL.EHN. ML:2.0 0.00020640275 0.4992 AML other m 2016-10-31T21:43:47.30
IV.VCEL.EHE. ML:2.1 0.00022189094999999998 0.4608 AML other m 2016-10-31T21:43:46.20
IV.T0110.HHN. ML:2.0 0.00016490865 0.2816 AML other m 2016-10-31T21:43:46.85
IV.T0110.HHE. ML:2.0 0.00017155615 0.3072 AML other m 2016-10-31T21:43:47.43
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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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