Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 17-10-2016 and time 12:21:20 (Italy) in region 8 km W Arquata del Tronto (AP)

A magnitude ML 0.9 earthquake occured in region: 8 km W Arquata del Tronto (AP), on

  • 17-10-2016 10:21:20 (UTC)
  • 17-10-2016 12:21:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7640, 13.2010 at 11 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
Arquata del Tronto AP 8 1178 1178
Accumoli RI 9 667 1845
Norcia PG 9 4957 6802
Montegallo AP 14 523 7325
Castelsantangelo sul Nera MC 15 281 7606
Cascia PG 16 3217 10823
Amatrice RI 17 2657 13480
Cittareale RI 17 482 13962
Acquasanta Terme AP 17 2916 16878
Montemonaco AP 18 604 17482
Preci PG 18 724 18206

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
49 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
92 Km NW of Chieti (51815 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
98 Km E of Viterbo (67173 inhabitants)
98 Km S of Ancona (100861 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 0.9 2016-10-17
10:21:20		 42.7642 13.2008 11 2016-10-17
10:34:44		 Sala Sismica INGV-Roma 30296421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-17 10:21:20 ± 0.04
Latitude 42.7642 ± 0.0018
Longitude 13.2008 ± 0.0037
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 30296421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 330
Semi-minor axis of confidence ellipse (meter) 140
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 228
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 0.32376
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 3
Type of magnitude ML
Reference to an origin 30296421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-17 10:34:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHN. 2016-10-17T10:21:32.48 0.6 undecidable manual S 318 35.9418 90 0.25 45
IV.T1246.HHE. 2016-10-17T10:21:30.91 0.3 undecidable manual S 130 31.1466 90 -0.04 72
IV.T1215.EHE. 2016-10-17T10:21:29.82 0.3 undecidable manual S 279 27.3504 90 -0.12 71
IV.LNSS.HHZ. 2016-10-17T10:21:28.52 0.3 undecidable manual S 216 22.1556 90 -0.03 72
IV.T1217.EHZ. 2016-10-17T10:21:28.47 0.3 undecidable manual S 255 22.755 90 -0.23 70
IV.CESI.HHN. 2016-10-17T10:21:27.31 0.1 undecidable manual P 318 35.9418 90 0.17 92
IV.T1216.EHE. 2016-10-17T10:21:27.78 0.3 undecidable manual S 314 20.3685 90 -0.29 70
IV.MC2.EHZ. 2016-10-17T10:21:27.25 0.3 undecidable manual S 357 16.3725 90 0.25 70
IV.T1299.EHZ. 2016-10-17T10:21:27.04 0.3 undecidable manual S 155 15.873 90 0.17 72
IV.T1243.HHZ. 2016-10-17T10:21:27.92 0.3 undecidable manual S 110 21.5673 90 -0.46 67
IV.T1204.EHZ. 2016-10-17T10:21:26.17 0.3 undecidable manual S 136 13.5753 92 -0.09 73
IV.T1246.HHE. 2016-10-17T10:21:26.36 0.1 positive manual P 130 31.1466 90 -0.04 96
IV.T1201.HNN. 2016-10-17T10:21:26.05 0.3 undecidable manual S 161 12.5763 103 0.07 74
IV.T1245.HHZ. 2016-10-17T10:21:25.34 0.3 undecidable manual S 354 10.2786 118 -0.09 75
IV.LNSS.HHZ. 2016-10-17T10:21:25.11 0.1 undecidable manual P 216 22.1556 90 0.1 97
IV.T1215.EHE. 2016-10-17T10:21:25.97 0.3 undecidable manual P 279 27.3504 90 0.16 71
IV.T1202.EHZ. 2016-10-17T10:21:24.62 0.3 undecidable manual S 164 6.993 136 -0.11 74
IV.MC2.EHZ. 2016-10-17T10:21:24.30 0.3 undecidable manual P 357 16.3725 90 0.19 71
IV.T1299.EHZ. 2016-10-17T10:21:24.23 0.1 positive manual P 155 15.873 90 0.19 96
IV.T1243.HHZ. 2016-10-17T10:21:24.79 0.1 undecidable manual P 110 21.5673 90 -0.12 96
IV.MMO1.EHZ. 2016-10-17T10:21:24.24 0.3 undecidable manual P 34 18.1707 90 -0.16 72
IV.T1217.EHZ. 2016-10-17T10:21:24.95 0.1 undecidable manual P 255 22.755 90 -0.14 95
IV.SMA1.EHZ. 2016-10-17T10:21:24.40 0.3 undecidable manual P 143 18.4704 90 -0.04 73
IV.NRCA.HHZ. 2016-10-17T10:21:24.99 0.3 undecidable manual S 318 10.4784 117 -0.47 68
IV.T1216.EHE. 2016-10-17T10:21:24.82 0.1 undecidable manual P 314 20.3685 90 0.08 97
IV.NRCA.HHZ. 2016-10-17T10:21:23.23 0.1 positive manual P 318 10.4784 117 0 100
IV.T1201.HNN. 2016-10-17T10:21:23.82 0.1 positive manual P 161 12.5763 103 0.29 95
IV.T1245.HHZ. 2016-10-17T10:21:23.32 0.1 positive manual P 354 10.2786 118 0.11 98
IV.T1204.EHZ. 2016-10-17T10:21:23.82 0.1 positive manual P 136 13.5753 92 0.13 97
IV.T1202.EHZ. 2016-10-17T10:21:22.96 0.1 negative manual P 164 6.993 136 0.16 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:0.7 0.000035799999999999996 0.16 AML other m 2016-10-17T10:21:28.86
IV.LNSS.HHE. ML:0.8 0.000046949999999999996 0.7 AML other m 2016-10-17T10:21:28.81
IV.NRCA.HHE. ML:1.2 0.000169 0.12 AML other m 2016-10-17T10:21:25.26
IV.NRCA.HHN. ML:1.0 0.0001115 0.18 AML other m 2016-10-17T10:21:25.50
IV.T1245.HHE. ML:1.0 0.00010350000000000001 0.58 AML other m 2016-10-17T10:21:27.00
IV.T1245.HHN. ML:1.0 0.0001125 1.32 AML other m 2016-10-17T10:21:27.54
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