Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 31-10-2016 and time 08:05:31 (UTC) in region 4 km NE Accumoli (RI)

A magnitude ML 2.0 earthquake occured in region: 4 km NE Accumoli (RI), on

  • 31-10-2016 08:05:31 (UTC)
  • 31-10-2016 09:05:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7250, 13.2710 at 14 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
Arquata del Tronto AP 6 1178 1845
Amatrice RI 11 2657 4502
Acquasanta Terme AP 12 2916 7418
Montegallo AP 14 523 7941
Cittareale RI 15 482 8423
Norcia PG 16 4957 13380
Valle Castellana TE 19 977 14357
Montemonaco AP 20 604 14961

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km W of Teramo (54892 inhabitants)
43 Km N of L'Aquila (69753 inhabitants)
53 Km E of Foligno (57155 inhabitants)
54 Km E of Terni (111501 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
83 Km W of Pescara (121014 inhabitants)
84 Km SE of Perugia (166134 inhabitants)
84 Km NW of Chieti (51815 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km NE of Tivoli (56533 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
08:05:31		 42.7253 13.271 15 2019-02-12
14:03:37		 Bollettino Sismico Italiano INGV 54005801
Reviewed
Rev100 		ML 2.2 2016-10-31
08:05:31		 42.7323 13.2762 14 2016-10-31
08:12:58		 Sala Sismica INGV-Roma 31233721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 08:05:31 ± 0.07
Latitude 42.7253 ± 0.0027
Longitude 13.2710 ± 0.0049
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 54005801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 379
Semi-minor axis of confidence ellipse (meter) 131
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 70
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 49
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) 0.03687
Epicentral distance of station farthest from the epicenter (degree) 0.69697
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 62
Type of magnitude ML
Reference to an origin 54005801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-05-30 08:30:14

ML:2.2

Field Value
Value 2.2
Uncertainty 0.4
Num. used stations 16
Type of magnitude ML
Reference to an origin 31233721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-31 08:12:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.OFFI.HHZ. 2016-10-31T08:05:46.81 0.6 undecidable manual S 55 41.0256 97 2.21 15
IV.PP3.EHZ. 2016-10-31T08:05:45.66 0.3 undecidable manual P 21 77.367 93 1.15 45
IV.GUMA.HHZ. 2016-10-31T08:05:44.48 0.3 undecidable manual S 8 37.8288 98 0.72 59
IV.T1211.EHZ. 2016-10-31T08:05:44.38 0.3 undecidable manual S 238 40.1265 97 0.01 70
IV.GIGS.HHZ. 2016-10-31T08:05:43.91 0.6 undecidable manual S 141 38.9277 97 -0.16 46
IV.SNTG.HHZ. 2016-10-31T08:05:42.29 0.3 undecidable manual P 336 64.5909 94 -0.25 64
IV.EL6.EHZ. 2016-10-31T08:05:42.86 0.3 undecidable manual P 348 68.376 94 -0.27 64
IV.T1215.EHZ. 2016-10-31T08:05:42.68 0.6 undecidable manual S 285 33.8439 99 -0.04 47
IV.T0110.HHZ. 2016-10-31T08:05:42.92 0.3 undecidable manual P 143 68.7756 93 -0.27 64
IV.T1217.EHZ. 2016-10-31T08:05:41.07 0.1 undecidable manual S 267 27.75 103 -0.04 96
IV.ASSB.HHZ. 2016-10-31T08:05:41.59 1.0 undecidable manual P 305 60.9945 94 -0.39 21
XO.AM05.EHZ. 2016-10-31T08:05:41.24 0.3 undecidable manual S 13 28.749 102 -0.14 70
IV.T1256.HHZ. 2016-10-31T08:05:41.89 0.6 undecidable manual S 353 31.3464 100 -0.18 46
IV.LNSS.HHZ. 2016-10-31T08:05:40.03 0.3 undecidable manual S 234 23.1546 107 0.09 72
IV.RM33.EHZ. 2016-10-31T08:05:40.31 0.3 undecidable manual S 191 24.4533 105 0.05 72
IV.T1246.HHZ. 2016-10-31T08:05:39.99 0.1 undecidable manual S 131 23.9538 106 -0.16 95
IV.CAMP.HHZ. 2016-10-31T08:05:39.83 0.3 undecidable manual S 152 23.8539 106 -0.28 69
IV.OFFI.HHZ. 2016-10-31T08:05:39.65 0.1 undecidable manual P 55 41.0256 97 0.73 77
IV.GIGS.HHZ. 2016-10-31T08:05:38.35 0.3 undecidable manual P 141 38.9277 97 -0.26 68
IV.MMO1.HNZ. 2016-10-31T08:05:38.79 0.1 undecidable manual S 13 19.869 112 -0.3 91
IV.GUMA.HHZ. 2016-10-31T08:05:38.64 0.3 undecidable manual P 8 37.8288 98 0.21 68
IV.T1211.EHZ. 2016-10-31T08:05:38.71 0.3 negative manual P 238 40.1265 97 -0.07 70
IV.T1245.HHZ. 2016-10-31T08:05:37.98 0.3 undecidable manual S 335 16.0728 119 -0.2 70
IV.T1299.EHZ. 2016-10-31T08:05:37.05 0.1 undecidable manual S 175 10.1787 136 0.12 97
IV.SMA1.EHZ. 2016-10-31T08:05:37.15 0.1 undecidable manual S 153 11.7771 131 -0.09 97
IV.T1243.HNZ. 2016-10-31T08:05:37.68 0.1 undecidable manual S 102 14.7741 122 -0.22 94
IV.T1215.EHZ. 2016-10-31T08:05:37.60 0.3 undecidable manual P 285 33.8439 99 -0.23 68
IV.T1256.HHZ. 2016-10-31T08:05:37.29 0.6 undecidable manual P 353 31.3464 100 -0.17 46
IV.CAMP.HHZ. 2016-10-31T08:05:36.32 0.3 undecidable manual P 152 23.8539 106 0 72
IV.TERO.HHZ. 2016-10-31T08:05:36.89 0.1 negative manual P 113 29.4483 101 -0.27 92
IV.T1201.HNZ. 2016-10-31T08:05:36.93 0.6 undecidable manual S 192 7.6812 145 0.41 46
IV.T1204.EHZ. 2016-10-31T08:05:36.40 0.1 undecidable manual S 146 6.5934 150 0.03 100
IV.T1217.EHZ. 2016-10-31T08:05:36.94 1.0 undecidable manual P 267 27.75 103 0.04 24
IV.T1246.HHZ. 2016-10-31T08:05:36.27 0.1 negative manual P 131 23.9538 106 -0.08 96
IV.LNSS.HHZ. 2016-10-31T08:05:36.31 0.1 positive manual P 234 23.1546 107 0.08 95
XO.AM05.EHZ. 2016-10-31T08:05:36.99 0.3 undecidable manual P 13 28.749 102 -0.06 71
IV.T1216.EHZ. 2016-10-31T08:05:36.62 0.3 undecidable manual P 312 27.5502 103 -0.25 69
IV.RM33.EHZ. 2016-10-31T08:05:36.43 0.3 undecidable manual P 191 24.4533 105 0.02 72
IV.T1244.HNZ. 2016-10-31T08:05:36.04 0.1 undecidable manual S 32 4.0959 161 -0.05 98
IV.T1241.HNZ. 2016-10-31T08:05:35.59 0.3 undecidable manual P 42 19.5693 112 -0.1 72
IV.T1243.HNZ. 2016-10-31T08:05:35.01 0.1 negative manual P 102 14.7741 122 -0.04 98
IV.T1245.HHZ. 2016-10-31T08:05:35.17 0.1 negative manual P 335 16.0728 119 -0.04 97
IV.MMO1.HNZ. 2016-10-31T08:05:35.63 0.1 negative manual P 13 19.869 112 -0.11 96
IV.NRCA.HNZ. 2016-10-31T08:05:35.22 0.3 undecidable manual P 313 17.4714 116 -0.19 71
IV.SMA1.EHZ. 2016-10-31T08:05:34.76 0.1 positive manual P 153 11.7771 131 0.09 97
IV.T1244.HNZ. 2016-10-31T08:05:34.05 0.1 negative manual P 32 4.0959 161 0.05 100
IV.T1299.EHZ. 2016-10-31T08:05:34.68 0.1 positive manual P 175 10.1787 136 0.19 96
IV.T1201.HNZ. 2016-10-31T08:05:34.51 0.1 undecidable manual P 192 7.6812 145 0.26 95
IV.T1204.EHZ. 2016-10-31T08:05:34.32 0.1 positive manual P 146 6.5934 150 0.16 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1245.HHE. ML:2.3 0.0014238445 0.16 AML other m 2016-10-31T08:05:35.54
IV.T1245.HNE. ML:2.3 0.0015093419999999999 0.16 AML other m 2016-10-31T08:05:35.54
IV.T1204.EHN. ML:2.2 0.0017785432000000001 0.1216 AML other m 2016-10-31T08:05:36.52
IV.T1204.EHE. ML:2.5 0.0033946195 0.1216 AML other m 2016-10-31T08:05:36.64
IV.SMA1.EHE. ML:2.2 0.0015012992 0.0768 AML other m 2016-10-31T08:05:37.49
IV.SMA1.EHN. ML:2.5 0.002856728 0.2624 AML other m 2016-10-31T08:05:37.45
IV.T1241.HNE. ML:2.1 0.0008374723500000001 0.2112 AML other m 2016-10-31T08:05:38.99
IV.T1241.HNN. ML:1.7 0.00036578364999999996 0.0896 AML other m 2016-10-31T08:05:38.00
IV.T1245.HHN. ML:2.5 0.0023601265000000003 0.224 AML other m 2016-10-31T08:05:39.11
IV.T1245.HNN. ML:2.5 0.0023385949999999997 0.2112 AML other m 2016-10-31T08:05:39.12
IV.LNSS.HHE. ML:1.9 0.00049462145 0.1984 AML other m 2016-10-31T08:05:40.37
IV.LNSS.HHN. ML:2.2 0.00087247295 0.16 AML other m 2016-10-31T08:05:40.41
IV.RM33.HNN. ML:2.1 0.0006730562499999999 0.256 AML other m 2016-10-31T08:05:40.48
IV.RM33.EHN. ML:2.0 0.00062530385 0.2816 AML other m 2016-10-31T08:05:40.48
IV.RM33.HNE. ML:2.0 0.0005103204 0.1984 AML other m 2016-10-31T08:05:40.79
IV.RM33.EHE. ML:2.0 0.00049632635 0.1984 AML other m 2016-10-31T08:05:40.80
IV.TERO.HNE. ML:1.8 0.00028820345 0.16 AML other m 2016-10-31T08:05:41.47
IV.T1217.HNN. ML:2.2 0.0008189519 0.16 AML other m 2016-10-31T08:05:41.46
IV.T1217.EHN. ML:2.2 0.0008303200000000001 0.1728 AML other m 2016-10-31T08:05:41.55
XO.AM05.HNE. ML:1.9 0.00041417345 0.0832 AML other m 2016-10-31T08:05:41.60
IV.T1217.HNE. ML:2.0 0.0005007958499999999 0.0768 AML other m 2016-10-31T08:05:41.75
IV.T1217.EHE. ML:2.0 0.0004767125000000001 0.0768 AML other m 2016-10-31T08:05:41.72
XO.AM05.EHN. ML:1.7 0.0002189894 0.0832 AML other m 2016-10-31T08:05:41.81
XO.AM05.EHE. ML:2.7 0.00251473 0.0768 AML other m 2016-10-31T08:05:41.78
XO.AM05.HNN. ML:2.1 0.0006731592 0.1024 AML other m 2016-10-31T08:05:41.83
IV.T1256.HNN. ML:2.0 0.00043585544999999996 0.128 AML other m 2016-10-31T08:05:42.66
IV.T1256.HHN. ML:2.0 0.0004532372 0.1408 AML other m 2016-10-31T08:05:42.73
IV.TERO.HNN. ML:1.8 0.00029767071499999995 0.1408 AML other m 2016-10-31T08:05:42.75
IV.TERO.HHN. ML:1.9 0.00035444385 0.0832 AML other m 2016-10-31T08:05:42.82
IV.T1256.HHE. ML:2.0 0.00043653079999999997 0.1856 AML other m 2016-10-31T08:05:43.19
IV.T1256.HNE. ML:2.0 0.0004613419999999999 0.1792 AML other m 2016-10-31T08:05:43.11
IV.T1215.HNN. ML:1.8 0.000244714485 0.096 AML other m 2016-10-31T08:05:43.36
IV.T1215.EHN. ML:1.8 0.0002405320000000001 0.096 AML other m 2016-10-31T08:05:43.36
IV.TERO.HHE. ML:1.8 0.00032293275 0.1408 AML other m 2016-10-31T08:05:43.43
IV.T1215.EHE. ML:1.8 0.00026060560000000006 0.064 AML other m 2016-10-31T08:05:44.12
IV.T1215.HNE. ML:1.8 0.000254527765 0.064 AML other m 2016-10-31T08:05:44.08
IV.GIGS.HHN. ML:1.5 0.0001002524 0.1408 AML other m 2016-10-31T08:05:44.19
IV.GUMA.HNN. ML:2.9 0.0025750595 0.1984 AML other m 2016-10-31T08:05:44.76
IV.GUMA.HHN. ML:2.8 0.002366847 0.1984 AML other m 2016-10-31T08:05:44.86
IV.T1211.HNE. ML:2.0 0.0003269395 0.1088 AML other m 2016-10-31T08:05:45.32
IV.T1211.EHE. ML:2.0 0.000320102 0.128 AML other m 2016-10-31T08:05:45.27
IV.T1211.HNN. ML:2.2 0.00055641495 0.2432 AML other m 2016-10-31T08:05:45.94
IV.T1211.EHN. ML:2.2 0.00054101795 0.2432 AML other m 2016-10-31T08:05:45.94
IV.T1216.EHE. ML:1.9 0.00042459545 0.1792 AML other m 2016-10-31T08:05:46.68
IV.GIGS.HHE. ML:1.2 0.000054949285 0.32 AML other m 2016-10-31T08:05:46.60
IV.GUMA.HNE. ML:2.6 0.0015141165 0.3712 AML other m 2016-10-31T08:05:46.00
IV.GUMA.HHE. ML:2.8 0.0023004955000000002 0.3008 AML other m 2016-10-31T08:05:47.00
IV.OFFI.HHE. ML:2.2 0.0005207215 0.1792 AML other m 2016-10-31T08:05:47.34
IV.OFFI.HHN. ML:2.6 0.0011711795 0.32 AML other m 2016-10-31T08:05:47.50
IV.T1216.EHN. ML:2.0 0.00046057455 0.1408 AML other m 2016-10-31T08:05:47.68
IV.SNTG.HNE. ML:1.7 0.000096550725 0.5376 AML other m 2016-10-31T08:05:49.83
IV.VCEL.EHE. ML:2.0 0.000208573295 0.224 AML other m 2016-10-31T08:05:51.77
IV.ASSB.HHN. ML:1.7 0.000101944855 0.1792 AML other m 2016-10-31T08:05:51.97
IV.VCEL.EHN. ML:2.0 0.00021789255 0.2816 AML other m 2016-10-31T08:05:52.35
IV.SNTG.HHE. ML:1.5 0.000056847789999999994 0.1024 AML other m 2016-10-31T08:05:52.56
IV.ASSB.HHE. ML:1.7 0.000096141265 0.3392 AML other m 2016-10-31T08:05:52.54
IV.EL6.EHN. ML:2.1 0.000203419 0.16 AML other m 2016-10-31T08:05:54.86
IV.EL6.EHE. ML:2.1 0.00020224655 0.2368 AML other m 2016-10-31T08:05:55.39
IV.T0110.HHE. ML:2.0 0.0001543541 0.3392 AML other m 2016-10-31T08:05:55.37
IV.T0110.HHN. ML:2.1 0.0001990759 0.3456 AML other m 2016-10-31T08:05:57.73
IV.SNTG.HNN. ML:2.0 0.0001661387 0.7488 AML other m 2016-10-31T08:06:02.51
IV.SNTG.HHN. ML:1.6 0.00007517503500000001 0.2176 AML other m 2016-10-31T08:06:04.44
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