Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 16-10-2016 and time 18:35:50 (UTC) in region 1 km SW Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 1 km SW Accumoli (RI), on

  • 16-10-2016 18:35:50 (UTC)
  • 16-10-2016 20:35:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6910, 13.2390 at 12 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 1 667 667
Amatrice RI 8 2657 3324
Arquata del Tronto AP 10 1178 4502
Cittareale RI 10 482 4984
Norcia PG 16 4957 9941
Acquasanta Terme AP 17 2916 12857
Campotosto AQ 18 542 13399
Montereale AQ 19 2581 15980
Montegallo AP 19 523 16503
Cascia PG 19 3217 19720
Capitignano AQ 20 665 20385

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Teramo (54892 inhabitants)
40 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
77 Km W of Montesilvano (53738 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
84 Km W of Pescara (121014 inhabitants)
85 Km W of Chieti (51815 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
98 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 1.2 2016-10-16
18:35:50		 42.6913 13.2393 12 2016-10-16
18:59:22		 Sala Sismica INGV-Roma 30270871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-16 18:35:50 ± 0.05
Latitude 42.6913 ± 0.0027
Longitude 13.2393 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 30270871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 309
Semi-minor axis of confidence ellipse (meter) 111
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34174
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 30270871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-16 18:59:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PCRO.HNZ. 2016-10-16T18:36:14.99 3.0 undecidable manual S -0.21 0
IV.GIGS.HHZ. 2016-10-16T18:36:03.05 1.0 undecidable manual S 134 37.9287 92 -0.08 24
IV.T1211.EHZ. 2016-10-16T18:36:02.75 1.0 undecidable manual S 241 35.9418 92 0.16 24
IV.T1215.EHZ. 2016-10-16T18:36:01.52 0.6 undecidable manual S 292 32.6451 93 -0.17 48
IV.TERO.HHZ. 2016-10-16T18:36:00.96 0.6 undecidable manual S 104 30.747 93 -0.23 48
IV.T1216.EHZ. 2016-10-16T18:36:00.58 0.6 undecidable manual S 321 28.4493 93 -0.01 50
IV.MC2.EHZ. 2016-10-16T18:35:59.76 0.3 undecidable manual S 350 24.753 94 0.16 73
IV.MMO1.EHZ. 2016-10-16T18:35:59.26 0.6 undecidable manual S 17 24.1536 95 -0.18 49
IV.T1217.EHZ. 2016-10-16T18:35:59.71 1.0 undecidable manual S 275 25.2525 94 -0.02 25
IV.LNSS.HHZ. 2016-10-16T18:35:58.08 0.6 undecidable manual S 239 18.9699 98 0 51
IV.ARRO.EHZ. 2016-10-16T18:35:58.99 3.0 undecidable manual S -3.25 0
IV.RM33.EHZ. 2016-10-16T18:35:58.75 0.6 undecidable manual S 186 20.3685 97 0.32 48
IV.CAMP.HHZ. 2016-10-16T18:35:58.88 0.6 undecidable manual S 141 22.1556 96 -0.02 50
IV.T1243.HHZ. 2016-10-16T18:35:57.29 0.6 undecidable manual S 88 17.0718 101 -0.27 49
IV.NRCA.HHZ. 2016-10-16T18:35:57.62 0.6 undecidable manual S 327 18.7701 99 -0.4 47
IV.GIGS.HHZ. 2016-10-16T18:35:57.77 0.6 undecidable manual P 134 37.9287 92 -0.03 49
IV.T1245.HHZ. 2016-10-16T18:35:57.92 0.6 undecidable manual S 347 18.7701 99 -0.1 51
IV.T1211.EHZ. 2016-10-16T18:35:57.65 0.3 undecidable manual P 241 35.9418 92 0.15 73
IV.T1216.EHZ. 2016-10-16T18:35:56.40 0.3 undecidable manual P 321 28.4493 93 0.06 75
IV.TERO.HHZ. 2016-10-16T18:35:56.62 0.3 undecidable manual P 104 30.747 93 -0.07 74
IV.MC2.EHZ. 2016-10-16T18:35:56.08 0.3 undecidable manual P 350 24.753 94 0.31 71
IV.T1215.EHZ. 2016-10-16T18:35:56.88 0.3 undecidable manual P 292 32.6451 93 -0.09 74
IV.SMA1.EHZ. 2016-10-16T18:35:55.89 0.6 undecidable manual S 131 10.3785 125 -0.02 52
IV.T1245.HHZ. 2016-10-16T18:35:55.25 0.6 undecidable manual P 347 18.7701 99 0.4 47
IV.T1217.EHZ. 2016-10-16T18:35:55.90 0.3 undecidable manual P 275 25.2525 94 0.06 75
IV.RM33.EHZ. 2016-10-16T18:35:55.11 0.3 undecidable manual P 186 20.3685 97 0.02 77
IV.T1204.EHZ. 2016-10-16T18:35:55.04 0.3 undecidable manual S 105 6.4935 143 -0.14 77
IV.CAMP.HHZ. 2016-10-16T18:35:55.52 0.3 undecidable manual P 141 22.1556 96 0.16 74
IV.MMO1.EHZ. 2016-10-16T18:35:55.69 0.3 undecidable manual P 17 24.1536 95 0.01 76
IV.LNSS.HHZ. 2016-10-16T18:35:54.44 0.3 undecidable manual P 239 18.9699 98 -0.45 70
IV.T1243.HHZ. 2016-10-16T18:35:54.20 0.6 undecidable manual P 88 17.0718 101 -0.39 47
IV.NRCA.HHZ. 2016-10-16T18:35:54.79 0.3 undecidable manual P 327 18.7701 99 -0.06 76
IV.T1204.EHZ. 2016-10-16T18:35:53.44 0.1 negative manual P 105 6.4935 143 0.23 100
IV.SMA1.EHZ. 2016-10-16T18:35:53.82 0.3 undecidable manual P 131 10.3785 125 0.18 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.1 0.0000992 0.92 AML other m 2016-10-16T18:35:58.85
IV.LNSS.HHE. ML:1.4 0.0001835 0.36 AML other m 2016-10-16T18:35:58.51
IV.NRCA.HHN. ML:1.6 0.0002675 0.46 AML other m 2016-10-16T18:35:57.76
IV.NRCA.HHE. ML:1.6 0.0003085 0.1 AML other m 2016-10-16T18:35:57.96
IV.RM33.EHN. ML:1.0 0.0000715 0.88 AML other m 2016-10-16T18:35:59.55
IV.RM33.EHE. ML:1.3 0.0001347 0.3 AML other m 2016-10-16T18:35:59.41
IV.SMA1.EHN. ML:0.9 0.00009204999999999999 0.3 AML other m 2016-10-16T18:35:55.97
IV.SMA1.EHE. ML:1.0 0.0001051 0.66 AML other m 2016-10-16T18:35:57.19
IV.T1245.HHE. ML:1.2 0.00010300000000000001 1.32 AML other m 2016-10-16T18:35:58.13
IV.T1245.HHN. ML:1.2 0.000129 0.3 AML other m 2016-10-16T18:35:59.65
IV.TERO.HHN. ML:1.2 0.00007855 0.6 AML other m 2016-10-16T18:36:01.55
IV.TERO.HHE. ML:1.0 0.000048799999999999994 1.42 AML other m 2016-10-16T18:36:02.56
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