Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 31-10-2016 and time 00:37:44 (Italy) in region 4 km W Accumoli (RI)

A magnitude ML 2.5 earthquake occured in region: 4 km W Accumoli (RI), on

  • 30-10-2016 23:37:44 (UTC)
  • 31-10-2016 00:37:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6800, 13.2080 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 4 667 667
Cittareale RI 8 482 1149
Amatrice RI 9 2657 3806
Arquata del Tronto AP 13 1178 4984
Norcia PG 16 4957 9941
Cascia PG 16 3217 13158
Montereale AQ 18 2581 15739
Campotosto AQ 19 542 16281
Acquasanta Terme AP 19 2916 19197
Capitignano AQ 19 665 19862
Borbona RI 20 617 20479
Posta RI 20 694 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of L'Aquila (69753 inhabitants)
41 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km W of Pescara (121014 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
87 Km W of Chieti (51815 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
Bulletin
Rev1000 		ML 2.5 2016-10-30
23:37:44		 42.6802 13.2082 13 2019-02-12
14:03:25		 Bollettino Sismico Italiano INGV 48768181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-30 23:37:44 ± 0.07
Latitude 42.6802 ± 0.0036
Longitude 13.2082 ± 0.0037
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 48768181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 356
Semi-minor axis of confidence ellipse (meter) 249
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
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) 60
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.03867
Epicentral distance of station farthest from the epicenter (degree) 0.43347
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 48768181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-08-07 08:30:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1215.EHZ. 2016-10-30T23:37:55.37 0.6 undecidable manual S 296 30.747 96 -0.19 47
IV.TERO.HHZ. 2016-10-30T23:37:55.76 0.6 undecidable manual S 101 32.9448 96 -0.37 45
IV.MMO1.HNZ. 2016-10-30T23:37:54.29 0.6 undecidable manual S 22 26.1516 98 -0.05 49
IV.T1241.HNZ. 2016-10-30T23:37:54.49 0.6 undecidable manual S 43 26.6511 98 0.02 49
IV.OFFI.HHE. 2016-10-30T23:37:54.59 0.1 undecidable manual P 54 48.1185 93 0.9 73
IV.T1246.HHN. 2016-10-30T23:37:53.97 0.6 undecidable manual S 115 25.6521 99 -0.22 47
IV.T1217.EHZ. 2016-10-30T23:37:53.30 0.6 undecidable manual S 279 22.8549 101 -0.17 48
IV.CAMP.HHE. 2016-10-30T23:37:53.40 0.6 undecidable manual S 134 22.9548 101 -0.09 49
IV.ARRO.EHZ. 2016-10-30T23:37:52.01 0.1 undecidable manual P 253 37.8288 94 -0.11 95
IV.T1243.HNZ. 2016-10-30T23:37:52.39 0.6 undecidable manual S 85 19.6692 105 -0.25 48
IV.RM33.HNZ. 2016-10-30T23:37:52.49 0.6 undecidable manual S 178 18.9699 106 0.03 50
IV.T1245.HNZ. 2016-10-30T23:37:52.66 0.6 undecidable manual S 355 19.6692 105 0.03 50
IV.LNSS.HHZ. 2016-10-30T23:37:51.92 0.6 undecidable manual S 238 16.1727 112 0.18 49
XO.AM05.EHZ. 2016-10-30T23:37:51.02 0.3 undecidable manual P 20 35.0427 95 -0.66 62
IV.TERO.HHZ. 2016-10-30T23:37:51.16 0.1 undecidable manual P 101 32.9448 96 -0.21 94
IV.T1241.HNZ. 2016-10-30T23:37:50.45 0.3 undecidable manual P 43 26.6511 98 0.04 74
IV.T1215.EHZ. 2016-10-30T23:37:50.89 0.1 undecidable manual P 296 30.747 96 -0.15 96
IV.T1246.HHN. 2016-10-30T23:37:50.24 0.1 undecidable manual P 115 25.6521 99 0 99
IV.MMO1.HNZ. 2016-10-30T23:37:50.34 0.3 undecidable manual P 22 26.1516 98 0.01 74
IV.SMA1.EHZ. 2016-10-30T23:37:50.64 0.6 undecidable manual S 118 11.7771 125 -0.07 50
IV.RM33.HNZ. 2016-10-30T23:37:49.36 0.1 undecidable manual P 178 18.9699 106 0.11 98
IV.CAMP.HHE. 2016-10-30T23:37:49.99 0.3 undecidable manual P 134 22.9548 101 0.15 72
IV.T1245.HNZ. 2016-10-30T23:37:49.49 0.3 undecidable manual P 355 19.6692 105 0.15 73
IV.T1299.HNN. 2016-10-30T23:37:49.78 0.6 undecidable manual S 130 7.881 140 -0.17 49
IV.T1217.EHZ. 2016-10-30T23:37:49.76 0.1 undecidable manual P 279 22.8549 101 -0.07 99
IV.T1201.HNN. 2016-10-30T23:37:49.33 0.3 undecidable manual S 126 4.2957 157 -0.12 75
IV.T1204.EHZ. 2016-10-30T23:37:49.95 0.6 undecidable manual S 93 8.88 136 -0.17 49
IV.T1243.HNZ. 2016-10-30T23:37:49.28 0.1 undecidable manual P 85 19.6692 105 -0.07 99
IV.T1204.EHZ. 2016-10-30T23:37:48.03 0.1 negative manual P 93 8.88 136 0.13 100
IV.SMA1.EHZ. 2016-10-30T23:37:48.51 0.1 undecidable manual P 118 11.7771 125 0.27 96
IV.LNSS.HHZ. 2016-10-30T23:37:48.87 0.1 undecidable manual P 238 16.1727 112 0.03 100
IV.T1299.HNN. 2016-10-30T23:37:47.93 0.1 undecidable manual P 130 7.881 140 0.13 100
IV.T1201.HNN. 2016-10-30T23:37:47.67 0.1 undecidable manual P 126 4.2957 157 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
XO.AM05.HNE. ML:2.1 0.0004988465 0.0768 AML other m 2016-10-30T23:37:57.75
XO.AM05.EHN. ML:1.6 0.0001605811 0.0896 AML other m 2016-10-30T23:37:57.66
XO.AM05.HNN. ML:2.1 0.00046135555 0.0896 AML other m 2016-10-30T23:37:57.59
XO.AM05.EHE. ML:2.7 0.0021504320000000003 0.1024 AML other m 2016-10-30T23:37:57.77
IV.ARRO.EHE. ML:2.3 0.00065810425 0.1792 AML other m 2016-10-30T23:37:59.75
IV.ARRO.EHN. ML:2.3 0.0006769503500000001 0.1792 AML other m 2016-10-30T23:38:00.30
IV.LNSS.HHE. ML:2.2 0.0012098289 0.1536 AML other m 2016-10-30T23:37:52.99
IV.LNSS.HHN. ML:2.7 0.004024179 0.128 AML other m 2016-10-30T23:37:52.27
IV.RM33.EHN. ML:2.6 0.002659727 0.1792 AML other m 2016-10-30T23:37:52.70
IV.RM33.HNN. ML:2.6 0.002663147 0.1792 AML other m 2016-10-30T23:37:52.69
IV.RM33.HNE. ML:2.6 0.0025033810000000003 0.192 AML other m 2016-10-30T23:37:53.27
IV.RM33.EHE. ML:2.5 0.0024883155 0.2048 AML other m 2016-10-30T23:37:53.27
IV.SMA1.EHN. ML:2.7 0.004848014 0.3456 AML other m 2016-10-30T23:37:52.02
IV.SMA1.EHE. ML:3.0 0.010482098499999998 0.1536 AML other m 2016-10-30T23:37:51.23
IV.T1204.EHN. ML:2.6 0.003980087 0.0896 AML other m 2016-10-30T23:37:50.34
IV.T1204.EHE. ML:2.8 0.0079138305 0.2304 AML other m 2016-10-30T23:37:50.59
IV.T1217.HNE. ML:2.4 0.0015152045 0.1408 AML other m 2016-10-30T23:37:53.52
IV.T1217.HNN. ML:2.5 0.0019233760000000003 0.2432 AML other m 2016-10-30T23:37:53.41
IV.T1217.EHE. ML:2.4 0.0015024372 0.128 AML other m 2016-10-30T23:37:53.45
IV.T1217.EHN. ML:2.5 0.0018519768999999998 0.2432 AML other m 2016-10-30T23:37:53.41
IV.T1241.HNN. ML:2.2 0.00075087 0.192 AML other m 2016-10-30T23:37:54.76
IV.T1241.EHE. ML:2.6 0.0021797080000000003 0.2048 AML other m 2016-10-30T23:37:54.69
IV.T1241.HNE. ML:2.6 0.002184828 0.2048 AML other m 2016-10-30T23:37:54.59
IV.T1241.EHN. ML:2.2 0.00083530395 0.2944 AML other m 2016-10-30T23:37:55.34
IV.T1245.HNE. ML:2.9 0.0061755665 0.1664 AML other m 2016-10-30T23:37:53.21
IV.T1245.HNN. ML:3.2 0.010253411 0.3456 AML other m 2016-10-30T23:37:53.50
IV.T1245.HHE. ML:2.9 0.005436163 0.1536 AML other m 2016-10-30T23:37:53.12
IV.T1245.HHN. ML:3.2 0.010152625 0.3328 AML other m 2016-10-30T23:37:53.48
IV.TERO.HHE. ML:2.3 0.0008889920499999999 0.1152 AML other m 2016-10-30T23:37:57.79
IV.TERO.HNN. ML:2.3 0.00093178025 0.384 AML other m 2016-10-30T23:37:58.94
IV.TERO.HNE. ML:2.3 0.0008219227499999999 0.128 AML other m 2016-10-30T23:37:57.79
IV.TERO.HHN. ML:2.4 0.0009569681 0.2304 AML other m 2016-10-30T23:37:58.94
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