Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 23-10-2016 and time 18:26:57 (UTC) in region 7 km W Arquata del Tronto (AP)

A magnitude ML 1.3 earthquake occured in region: 7 km W Arquata del Tronto (AP), on

  • 23-10-2016 18:26:57 (UTC)
  • 23-10-2016 20:26:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8030, 13.2240 at 9 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 7 1178 1178
Montegallo AP 10 523 1701
Norcia PG 11 4957 6658
Castelsantangelo sul Nera MC 12 281 6939
Accumoli RI 12 667 7606
Montemonaco AP 14 604 8210
Acquasanta Terme AP 16 2916 11126
Ussita MC 17 444 11570
Preci PG 17 724 12294
Visso MC 18 1107 13401
Montefortino FM 18 1178 14579
Cascia PG 20 3217 17796
Amatrice RI 20 2657 20453

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
52 Km N of L'Aquila (69753 inhabitants)
54 Km NE of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
92 Km NW of Chieti (51815 inhabitants)
94 Km S of Ancona (100861 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
100 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
Reviewed
Rev100 		ML 1.3 2016-10-23
18:26:57		 42.8032 13.224 9 2016-10-23
18:34:51		 Sala Sismica INGV-Roma 30486051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-23 18:26:57 ± 0.04
Latitude 42.8032 ± 0.0027
Longitude 13.2240 ± 0.0025
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 30486051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 239
Semi-minor axis of confidence ellipse (meter) 223
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 0
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.33185
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 30486051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-23 18:34:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2016-10-23T18:27:10.14 0.1 undecidable manual S 123 36.8298 50 -0.08 94
IV.FDMO.HHZ. 2016-10-23T18:27:07.69 0.1 undecidable manual S 337 28.1496 108 -0.03 96
IV.T1215.EHZ. 2016-10-23T18:27:07.80 0.1 undecidable manual S 270 28.9488 107 -0.18 93
IV.T1243.HHZ. 2016-10-23T18:27:05.57 0.1 undecidable manual S 123 21.7671 112 -0.06 97
IV.TERO.HHZ. 2016-10-23T18:27:04.76 0.1 undecidable manual P 123 36.8298 50 -0.07 94
IV.T1216.EHZ. 2016-10-23T18:27:04.84 0.1 undecidable manual S 300 19.2696 115 0 99
IV.T1215.EHZ. 2016-10-23T18:27:03.57 0.1 undecidable manual P 270 28.9488 107 0.04 96
IV.MMO1.EHZ. 2016-10-23T18:27:03.07 0.1 undecidable manual S 38 13.5753 124 -0.04 99
IV.FDMO.HHZ. 2016-10-23T18:27:03.43 0.1 undecidable manual P 337 28.1496 108 0.05 96
IV.NRCA.HHZ. 2016-10-23T18:27:02.00 0.1 undecidable manual S 291 9.5793 133 -0.01 100
IV.T1243.HHZ. 2016-10-23T18:27:02.33 0.1 undecidable manual P 123 21.7671 112 0.15 95
IV.T1245.HHZ. 2016-10-23T18:27:01.12 0.1 undecidable manual S 334 6.5934 144 -0.22 96
IV.T1216.EHZ. 2016-10-23T18:27:01.84 0.1 undecidable manual P 300 19.2696 115 0.12 96
IV.MMO1.EHZ. 2016-10-23T18:27:00.78 0.1 undecidable manual P 38 13.5753 124 0.06 98
IV.NRCA.HHZ. 2016-10-23T18:27:00.31 0.1 positive manual P 291 9.5793 133 0.22 96
IV.T1245.HHZ. 2016-10-23T18:26:59.78 0.1 undecidable manual P 334 6.5934 144 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.000313 0.12 AML other m 2016-10-23T18:27:02.19
IV.NRCA.HHE. ML:1.3 0.000273 1.14 AML other m 2016-10-23T18:27:02.19
IV.T1245.HHE. ML:1.1 0.0002075 0.34 AML other m 2016-10-23T18:27:01.90
IV.T1245.HHN. ML:1.2 0.0002825 0.32 AML other m 2016-10-23T18:27:02.03
IV.T1245.HNN. ML:1.5 0.0005145 1.1 AML other m 2016-10-23T18:27:26.98
IV.T1245.HNE. ML:1.4 0.0004718 1.26 AML other m 2016-10-23T18:27:26.99
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