Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 17-12-2016 and time 18:09:55 (Italy) in region 6 km W Arquata del Tronto (AP)

A magnitude ML 1.4 earthquake occured in region: 6 km W Arquata del Tronto (AP), on

  • 17-12-2016 17:09:55 (UTC)
  • 17-12-2016 18:09:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7960, 13.2340 at 23 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 6 1178 1178
Montegallo AP 10 523 1701
Accumoli RI 11 667 2368
Norcia PG 12 4957 7325
Castelsantangelo sul Nera MC 13 281 7606
Montemonaco AP 14 604 8210
Acquasanta Terme AP 15 2916 11126
Ussita MC 18 444 11570
Preci PG 18 724 12294
Montefortino FM 19 1178 13472
Amatrice RI 19 2657 16129
Visso MC 19 1107 17236
Cascia PG 20 3217 20453

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Teramo (54892 inhabitants)
47 Km E of Foligno (57155 inhabitants)
51 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
77 Km E of Perugia (166134 inhabitants)
81 Km W of Montesilvano (53738 inhabitants)
88 Km W of Pescara (121014 inhabitants)
91 Km NW of Chieti (51815 inhabitants)
94 Km S of Ancona (100861 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
99 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 1.4 2016-12-17
17:09:55		 42.7963 13.2343 23 2016-12-17
17:24:14		 Sala Sismica INGV-Roma 36998651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-12-17 17:09:55 ± 0.68
Latitude 42.7963 ± 0.0306
Longitude 13.2343 ± 0.0257
Depth (km) 23 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 36998651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2680
Semi-minor axis of confidence ellipse (meter) 2541
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 2680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.09533
Epicentral distance of station farthest from the epicenter (degree) 0.32196
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 36998651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-12-17 17:24:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1241.EHZ. 2016-12-17T17:10:04.18 0.6 undecidable manual S 67 17.3715 138 -0.07 50
IV.NRCA.HHZ. 2016-12-17T17:10:03.10 0.1 undecidable manual S 293 10.5783 152 -0.11 100
IV.TERO.HHZ. 2016-12-17T17:10:02.65 0.1 undecidable manual P 122 35.742 115 -0.22 94
IV.T1216.EHZ. 2016-12-17T17:10:02.05 0.6 undecidable manual S 301 20.3685 133 -2.77 5
IV.T1241.EHZ. 2016-12-17T17:10:01.15 1.0 undecidable manual P 67 17.3715 138 0.59 22
IV.LNSS.HHZ. 2016-12-17T17:10:01.68 0.1 undecidable manual P 216 26.6511 124 0.03 100
IV.T1216.EHZ. 2016-12-17T17:10:00.57 0.6 positive manual P 301 20.3685 133 -0.32 47
IV.NRCA.HHZ. 2016-12-17T17:10:00.53 0.1 undecidable manual P 293 10.5783 152 0.57 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.0 0.000039099999999999995 0.16 AML other m 2016-12-17T17:10:02.81
IV.FDMO.HHE. ML:1.0 0.0000422 1.26 AML other m 2016-12-17T17:10:10.27
IV.LNSS.HHN. ML:1.2 0.0000753 1.08 AML other m 2016-12-17T17:10:07.43
IV.LNSS.HHE. ML:1.2 0.00007735 0.94 AML other m 2016-12-17T17:10:05.58
IV.NRCA.HHE. ML:1.7 0.0002925 1.46 AML other m 2016-12-17T17:10:04.05
IV.NRCA.HHN. ML:1.6 0.00026349999999999995 0.1 AML other m 2016-12-17T17:10:04.08
IV.SMA1.EHN. ML:1.5 0.00016 1.2 AML other m 2016-12-17T17:10:02.33
IV.SMA1.EHE. ML:1.6 0.000179 0.5 AML other m 2016-12-17T17:10:02.39
IV.T1245.HHE. ML:1.4 0.000168 0.6 AML other m 2016-12-17T17:10:04.30
IV.T1245.HHN. ML:1.6 0.00028149999999999996 0.3 AML other m 2016-12-17T17:10:04.03
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