Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 31-10-2016 and time 18:12:03 (UTC) in region 2 km W Accumoli (RI)

A magnitude ML 1.6 earthquake occured in region: 2 km W Accumoli (RI), on

  • 31-10-2016 18:12:03 (UTC)
  • 31-10-2016 19:12:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6990, 13.2270 at 13 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 2 667 667
Amatrice RI 9 2657 3324
Arquata del Tronto AP 10 1178 4502
Cittareale RI 11 482 4984
Norcia PG 15 4957 9941
Acquasanta Terme AP 17 2916 12857
Cascia PG 18 3217 16074
Montegallo AP 18 523 16597
Montereale AQ 19 2581 19178
Campotosto AQ 20 542 19720

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Teramo (54892 inhabitants)
41 Km NW of L'Aquila (69753 inhabitants)
50 Km E of Terni (111501 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
85 Km W of Pescara (121014 inhabitants)
86 Km W of Chieti (51815 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
97 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 1.6 2016-10-31
18:12:03		 42.6993 13.2273 13 2019-02-12
14:03:14		 Bollettino Sismico Italiano INGV 45065061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 18:12:03 ± 0.06
Latitude 42.6993 ± 0.0027
Longitude 13.2273 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 45065061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 356
Semi-minor axis of confidence ellipse (meter) 116
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.54499
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 45065061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-05-10 03:29:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VCEL.EHZ. 2016-10-31T18:12:22.72 0.3 undecidable manual S 124 60.495 92 0.32 64
IV.FAGN.HHZ. 2016-10-31T18:12:20.49 0.3 undecidable manual S 149 56.1993 92 -0.78 57
IV.FIAM.HHZ. 2016-10-31T18:12:19.39 0.1 undecidable manual S 191 48.7179 93 0.14 91
IV.OFFI.HHZ. 2016-10-31T18:12:18.81 0.3 undecidable manual S 55 45.5211 93 0.39 66
IV.T1220.EHN. 2016-10-31T18:12:18.94 0.6 undecidable manual S 346 46.9197 93 0.15 46
MN.AQU.HLZ. 2016-10-31T18:12:17.50 0.3 undecidable manual S 159 40.9257 93 0.3 67
IV.GIGS.HHZ. 2016-10-31T18:12:16.83 0.1 undecidable manual S 134 39.2274 94 0.08 93
IV.ARRO.EHZ. 2016-10-31T18:12:16.35 0.6 undecidable manual S 251 39.9267 93 -0.58 42
IV.VCEL.EHZ. 2016-10-31T18:12:15.10 0.1 negative manual P 124 60.495 92 0.57 80
XO.AM05.HNZ. 2016-10-31T18:12:15.21 0.1 undecidable manual S 18 32.5452 95 0.27 93
IV.T1211.EHZ. 2016-10-31T18:12:15.97 0.6 undecidable manual S 239 35.5422 94 0.21 46
IV.TERO.HHZ. 2016-10-31T18:12:14.57 0.1 undecidable manual S 105 31.8459 95 -0.21 94
IV.T1247.HHZ. 2016-10-31T18:12:14.36 0.3 undecidable manual S 169 29.1486 96 0.3 68
IV.FAGN.HHZ. 2016-10-31T18:12:13.92 1.0 undecidable manual P 149 56.1993 92 0.04 23
IV.OFFI.HHZ. 2016-10-31T18:12:13.12 0.1 positive manual P 55 45.5211 93 0.88 73
IV.FIAM.HHZ. 2016-10-31T18:12:12.66 0.1 positive manual P 191 48.7179 93 -0.06 94
IV.MMO1.EHZ. 2016-10-31T18:12:12.35 0.6 undecidable manual S 20 23.6541 99 -0.24 47
IV.RM33.EHZ. 2016-10-31T18:12:12.16 0.1 undecidable manual S 183 21.1677 101 0.23 94
IV.CAMP.HHZ. 2016-10-31T18:12:12.33 0.1 undecidable manual S 141 23.4543 99 -0.21 95
IV.T1246.HHN. 2016-10-31T18:12:12.74 0.6 undecidable manual S 121 25.1526 98 -0.27 47
IV.T1217.EHZ. 2016-10-31T18:12:12.59 0.1 undecidable manual S 273 24.1536 98 -0.14 96
IV.T1220.EHN. 2016-10-31T18:12:11.94 0.1 undecidable manual P 346 46.9197 93 -0.51 84
IV.ARRO.EHZ. 2016-10-31T18:12:11.11 0.1 undecidable manual P 251 39.9267 93 -0.27 91
IV.LNSS.HHZ. 2016-10-31T18:12:11.34 0.6 undecidable manual S 235 18.6702 104 0.06 49
MN.AQU.HLZ. 2016-10-31T18:12:11.47 1.0 undecidable manual P 159 40.9257 93 -0.06 24
IV.T1243.HNZ. 2016-10-31T18:12:10.64 0.6 undecidable manual S 91 18.0708 106 -0.49 45
IV.T1211.EHZ. 2016-10-31T18:12:10.86 1.0 undecidable manual P 239 35.5422 94 0.16 23
XO.AM05.HNZ. 2016-10-31T18:12:10.13 0.1 positive manual P 18 32.5452 95 -0.1 95
IV.GIGS.HHZ. 2016-10-31T18:12:10.96 0.1 positive manual P 134 39.2274 94 -0.31 91
IV.T1217.EHZ. 2016-10-31T18:12:09.47 1.0 undecidable manual P 273 24.1536 98 0.51 22
IV.TERO.HHZ. 2016-10-31T18:12:09.89 0.1 negative manual P 105 31.8459 95 -0.24 93
IV.SMA1.EHZ. 2016-10-31T18:12:09.20 0.1 undecidable manual S 131 11.6772 124 -0.38 93
IV.T1247.HHZ. 2016-10-31T18:12:09.79 0.6 undecidable manual P 169 29.1486 96 0.07 48
IV.CAMP.HHZ. 2016-10-31T18:12:08.77 0.1 negative manual P 141 23.4543 99 -0.07 98
IV.MMO1.EHZ. 2016-10-31T18:12:08.68 1.0 undecidable manual P 20 23.6541 99 -0.19 24
IV.T1246.HHN. 2016-10-31T18:12:08.98 0.1 negative manual P 121 25.1526 98 -0.13 96
IV.T1204.EHZ. 2016-10-31T18:12:08.51 0.6 undecidable manual S 109 7.6812 140 -0.28 48
IV.T1201.HNN. 2016-10-31T18:12:08.55 0.1 undecidable manual S 158 4.995 153 0.16 99
IV.T1299.HNN. 2016-10-31T18:12:08.91 0.6 undecidable manual S 148 8.4804 136 -0.02 50
IV.RM33.EHZ. 2016-10-31T18:12:08.57 0.1 positive manual P 183 21.1677 101 0.08 97
IV.LNSS.HHZ. 2016-10-31T18:12:08.28 0.6 undecidable manual P 235 18.6702 104 0.16 48
IV.SMA1.EHZ. 2016-10-31T18:12:07.16 0.1 negative manual P 131 11.6772 124 0.03 100
IV.T1243.HNZ. 2016-10-31T18:12:07.90 0.1 negative manual P 91 18.0708 106 -0.13 97
IV.T1204.EHZ. 2016-10-31T18:12:06.78 0.1 negative manual P 109 7.6812 140 0.1 100
IV.T1201.HNN. 2016-10-31T18:12:06.62 0.1 negative manual P 158 4.995 153 0.17 99
IV.T1299.HNN. 2016-10-31T18:12:06.96 0.1 negative manual P 148 8.4804 136 0.2 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAMP.HHE. ML:1.6 0.00022487255 0.2176 AML other m 2016-10-31T18:12:12.61
IV.CAMP.HHN. ML:1.6 0.00020874429999999999 0.2176 AML other m 2016-10-31T18:12:12.65
IV.FAGN.HHE. ML:1.7 0.0001142494 0.768 AML other m 2016-10-31T18:12:24.00
IV.FAGN.HHN. ML:1.7 0.00010653446499999999 0.2304 AML other m 2016-10-31T18:12:24.68
IV.FIAM.HHN. ML:1.2 0.000045282205 0.7808 AML other m 2016-10-31T18:12:20.03
IV.FIAM.HHE. ML:1.2 0.000040266345 0.4992 AML other m 2016-10-31T18:12:21.02
IV.LNSS.HHE. ML:1.6 0.0003308132 0.3584 AML other m 2016-10-31T18:12:11.58
IV.LNSS.HHN. ML:1.9 0.00061126685 0.1408 AML other m 2016-10-31T18:12:11.86
IV.OFFI.HHN. ML:2.0 0.00025265075000000003 0.6656 AML other m 2016-10-31T18:12:21.27
IV.OFFI.HHE. ML:1.8 0.00016417868000000003 0.32 AML other m 2016-10-31T18:12:22.18
IV.RM33.EHN. ML:2.0 0.0006573481 0.1664 AML other m 2016-10-31T18:12:12.32
IV.RM33.HNN. ML:2.0 0.0006680299000000001 0.1536 AML other m 2016-10-31T18:12:12.39
IV.RM33.HNE. ML:1.9 0.0005415832000000001 0.1792 AML other m 2016-10-31T18:12:13.59
IV.RM33.EHE. ML:1.9 0.0005564446 0.1792 AML other m 2016-10-31T18:12:13.69
IV.SMA1.EHN. ML:1.6 0.00044635009999999996 0.192 AML other m 2016-10-31T18:12:10.04
IV.SMA1.EHE. ML:1.5 0.00031950405000000004 0.1792 AML other m 2016-10-31T18:12:10.82
IV.T1204.EHN. ML:1.6 0.0005256905 0.0896 AML other m 2016-10-31T18:12:08.77
IV.T1204.EHE. ML:1.9 0.00101084685 0.2048 AML other m 2016-10-31T18:12:09.26
IV.T1217.EHN. ML:1.4 0.00013651475000000003 0.2176 AML other m 2016-10-31T18:12:12.87
IV.T1217.HNE. ML:1.4 0.00014784664999999996 0.0896 AML other m 2016-10-31T18:12:12.81
IV.T1217.HNN. ML:1.6 0.00024207455 0.768 AML other m 2016-10-31T18:12:12.76
IV.T1217.EHE. ML:1.4 0.00015060399999999996 0.0896 AML other m 2016-10-31T18:12:12.81
IV.TERO.HHN. ML:1.6 0.00016712769999999998 0.1024 AML other m 2016-10-31T18:12:15.05
IV.TERO.HHE. ML:1.5 0.00012367893 0.32 AML other m 2016-10-31T18:12:15.20
IV.TERO.HNN. ML:1.6 0.0001525979999999999 0.1024 AML other m 2016-10-31T18:12:15.00
IV.TERO.HNE. ML:1.4 0.00011902184999999999 0.6016 AML other m 2016-10-31T18:12:15.13
IV.VCEL.EHN. ML:1.5 0.000071694385 0.2176 AML other m 2016-10-31T18:12:25.18
IV.VCEL.EHE. ML:1.8 0.00013060085 1.6384 AML other m 2016-10-31T18:12:25.64
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