Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 1.0 on date 18-10-2016 and time 14:48:48 (UTC) in region 4 km NW Accumoli (RI)

A magnitude Md 1.0 earthquake occured in region: 4 km NW Accumoli (RI), on

  • 18-10-2016 14:48:48 (UTC)
  • 18-10-2016 16:48:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7130, 13.2110 at 13 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 4 667 667
Arquata del Tronto AP 10 1178 1845
Amatrice RI 11 2657 4502
Cittareale RI 11 482 4984
Norcia PG 13 4957 9941
Cascia PG 16 3217 13158
Acquasanta Terme AP 17 2916 16074
Montegallo AP 18 523 16597

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Teramo (54892 inhabitants)
43 Km NW of L'Aquila (69753 inhabitants)
49 Km E of Terni (111501 inhabitants)
49 Km SE of Foligno (57155 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
80 Km SE of Perugia (166134 inhabitants)
87 Km W of Pescara (121014 inhabitants)
88 Km W of Chieti (51815 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km NE of Tivoli (56533 inhabitants)
96 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 		Md 1.0 2016-10-18
14:48:48		 42.7132 13.2112 13 2016-10-18
15:07:20		 Sala Sismica INGV-Roma 30336331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-18 14:48:48 ± 0.11
Latitude 42.7132 ± 0.0045
Longitude 13.2112 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 30336331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 460
Semi-minor axis of confidence ellipse (meter) 183
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 201
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.30217
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitude information

Md:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 3
Type of magnitude Md
Reference to an origin 30336331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-18 15:07:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2016-10-18T14:48:59.68 0.3 undecidable manual S 107 33.5442 96 -0.26 71
IV.T1215.EHZ. 2016-10-18T14:48:58.96 0.3 undecidable manual S 290 29.5482 97 0.08 75
IV.RM33.EHZ. 2016-10-18T14:48:56.75 0.3 undecidable manual S 179 22.6551 101 -0.3 70
IV.LNSS.HHZ. 2016-10-18T14:48:55.85 0.3 undecidable manual S 229 18.5703 107 -0.14 73
IV.SMA1.EHZ. 2016-10-18T14:48:54.88 0.6 undecidable manual S 132 13.6752 119 0.09 50
IV.T1215.EHZ. 2016-10-18T14:48:54.55 0.1 undecidable manual P 290 29.5482 97 0.06 100
IV.NRCA.HHE. 2016-10-18T14:48:54.33 0.3 undecidable manual S 329 15.4734 114 -0.9 58
IV.TERO.HHZ. 2016-10-18T14:48:54.96 0.3 undecidable manual P 107 33.5442 96 -0.14 72
IV.RM33.EHZ. 2016-10-18T14:48:53.34 0.3 undecidable manual P 179 22.6551 101 -0.09 74
IV.T1243.HHZ. 2016-10-18T14:48:53.02 0.3 undecidable manual P 95 19.4694 105 0.07 75
IV.T1299.EHN. 2016-10-18T14:48:53.95 0.3 undecidable manual S 146 10.4784 130 -0.14 75
IV.T1204.EHZ. 2016-10-18T14:48:53.77 0.3 undecidable manual S 116 9.5793 134 -0.13 76
IV.SMA1.EHZ. 2016-10-18T14:48:52.23 0.3 undecidable manual P 132 13.6752 119 0.11 76
IV.T1202.EHZ. 2016-10-18T14:48:52.97 0.3 undecidable manual S 134 1.4985 172 0.07 77
IV.LNSS.HHZ. 2016-10-18T14:48:52.79 0.3 undecidable manual P 229 18.5703 107 -0.03 75
IV.T1245.HHZ. 2016-10-18T14:48:52.67 0.1 undecidable manual P 353 15.9729 112 0.22 98
IV.NRCA.HHE. 2016-10-18T14:48:52.65 0.1 undecidable manual P 329 15.4734 114 0.27 98
IV.T1299.EHN. 2016-10-18T14:48:51.83 0.3 undecidable manual P 146 10.4784 130 0.1 76
IV.T1204.EHZ. 2016-10-18T14:48:51.80 0.3 undecidable manual P 116 9.5793 134 0.19 75
IV.T1201.HNZ. 2016-10-18T14:48:51.56 0.3 undecidable manual P 152 6.993 144 0.2 75
IV.T1202.EHZ. 2016-10-18T14:48:51.28 0.1 undecidable manual P 134 1.4985 172 0.25 100
IV.T1217.EHZ. 2016-10-18T14:48:50.67 3.0 undecidable manual P -0.39 0
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