Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-02-2017 and time 08:46:31 (Italy) in region 7 km NW Accumoli (RI)

A magnitude ML 1.3 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 18-02-2017 07:46:31 (UTC)
  • 18-02-2017 08:46:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7260, 13.1770 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
Accumoli RI 7 667 667
Norcia PG 10 4957 5624
Arquata del Tronto AP 11 1178 6802
Cittareale RI 12 482 7284
Cascia PG 13 3217 10501
Amatrice RI 14 2657 13158
Montegallo AP 18 523 13681
Castelsantangelo sul Nera MC 19 281 13962
Acquasanta Terme AP 20 2916 16878
Poggiodomo PG 20 117 16995

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
47 Km E of Terni (111501 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km W of Pescara (121014 inhabitants)
90 Km NE of Tivoli (56533 inhabitants)
91 Km W of Chieti (51815 inhabitants)
94 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 1.3 2017-02-18
07:46:31		 42.7255 13.1768 11 2017-02-18
08:03:14		 Sala Sismica INGV-Roma 41255651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-02-18 07:46:31 ± 0.06
Latitude 42.7255 ± 0.0045
Longitude 13.1768 ± 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 41255651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 500
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 359
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38941
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 5
Type of magnitude ML
Reference to an origin 41255651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-02-18 08:03:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VOBA.HNZ. 2017-02-18T07:47:40.88 3.0 positive manual Pg 18.629999 0
IV.T1216.EHZ. 2017-02-18T07:47:35.86 3.0 undecidable manual Sg 11.15 0
IV.ERC.EHZ. 2017-02-18T07:47:19.15 3.0 undecidable manual Sg 4.62 0
IV.T1247.HHZ. 2017-02-18T07:47:16.40 3.0 undecidable manual Sg 3.14 0
MN.TRI.BHZ. 2017-02-18T07:47:13.61 3.0 undecidable manual Pg 6.35 0
GU.SARM.EHZ. 2017-02-18T07:47:10.53 3.0 undecidable manual Pn 2.01 0
IV.RESU.HHZ. 2017-02-18T07:46:55.78 3.0 undecidable manual Sn -3.55 0
IV.PLLN.EHZ. 2017-02-18T07:46:55.98 3.0 undecidable manual Sg 4.09 0
IV.CSP1.EHZ. 2017-02-18T07:46:45.51 0.6 undecidable manual S 3 40.7259 90 0.32 45
IV.T1215.EHZ. 2017-02-18T07:46:41.38 0.6 undecidable manual S 289 26.5512 90 -0.02 49
IV.MC2.EHZ. 2017-02-18T07:46:40.14 0.3 undecidable manual S 3 20.6682 90 0.31 70
IV.PP3.EHZ. 2017-02-18T07:46:40.75 3.0 negative manual Pg 1.67 0
IV.RM33.EHZ. 2017-02-18T07:46:40.59 0.6 undecidable manual S 173 24.2535 90 -0.19 47
IV.T1217.EHZ. 2017-02-18T07:46:39.74 0.1 undecidable manual S 266 20.0688 90 0.06 98
IV.CSP1.EHZ. 2017-02-18T07:46:39.14 0.1 undecidable manual P 3 40.7259 90 -0.42 87
IV.T1220.EHZ. 2017-02-18T07:46:39.70 0.1 undecidable manual P 351 43.2234 90 -0.25 90
IV.LNSS.HHZ. 2017-02-18T07:46:39.11 0.6 undecidable manual S 219 17.5713 90 0.09 49
IV.T1215.EHZ. 2017-02-18T07:46:37.41 0.1 undecidable manual P 289 26.5512 90 0.04 97
IV.T1212.EHZ. 2017-02-18T07:46:37.23 0.6 undecidable manual S 285 11.1777 113 -0.09 49
IV.RM33.EHZ. 2017-02-18T07:46:36.96 0.6 negative manual P 173 24.2535 90 -0.05 48
IV.T1218.EHZ. 2017-02-18T07:46:36.53 0.6 undecidable manual S 219 7.9809 131 -0.07 50
IV.LNSS.HHZ. 2017-02-18T07:46:36.07 0.6 undecidable manual P 219 17.5713 90 0.08 49
IV.MC2.EHZ. 2017-02-18T07:46:36.33 0.1 undecidable manual P 3 20.6682 90 -0.14 96
IV.T1217.EHZ. 2017-02-18T07:46:36.42 0.1 undecidable manual P 266 20.0688 90 0.04 98
IV.T1299.EHZ. 2017-02-18T07:46:35.81 0.3 positive manual P 140 13.2756 96 0.48 68
IV.SMA1.EHZ. 2017-02-18T07:46:35.88 0.6 negative manual P 129 16.6722 90 0.03 50
IV.T1212.EHZ. 2017-02-18T07:46:35.10 1.0 undecidable manual P 285 11.1777 113 0.08 25
IV.T1218.EHZ. 2017-02-18T07:46:34.66 0.1 positive manual P 219 7.9809 131 0.06 100
IV.T1214.EHZ. 2017-02-18T07:46:33.96 1.0 undecidable manual P 34 4.5954 150 -0.31 24
IV.VIVA.HHZ. 2017-02-18T07:46:23.50 3.0 negative manual P -5.68 0
IV.LIK.EHZ.01 2017-02-18T07:46:23.21 3.0 negative manual Pn 2.71 0
IV.MCRV.HHZ. 2017-02-18T07:46:10.55 3.0 undecidable manual Sn -9.92 0
IV.VBKN.HHZ. 2017-02-18T07:46:01.07 3.0 undecidable manual Pn -6.87 0
GE.MATE.HHZ. 2017-02-18T07:45:47.44 3.0 negative manual P -4.85 0
MN.CUC.HHZ. 2017-02-18T07:45:41.45 3.0 negative manual P -6.1 0
IV.ORI.HHZ. 2017-02-18T07:45:38.94 3.0 undecidable manual S -5 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.AQU.HHN. ML:1.6 0.0001205 1.06 AML other m 2017-02-18T07:46:39.23
MN.AQU.HHE. ML:1.6 0.0001235 0.08 AML other m 2017-02-18T07:46:40.48
IV.LNSS.HHE. ML:1.1 0.00009755 1.16 AML other m 2017-02-18T07:46:39.88
IV.LNSS.HHN. ML:1.1 0.0001095 1.14 AML other m 2017-02-18T07:46:40.76
IV.T1214.HNN. ML:1.1 0.0002115 0.46 AML other m 2017-02-18T07:46:36.27
IV.T1214.EHN. ML:1.1 0.0001733 1.42 AML other m 2017-02-18T07:46:36.84
IV.T1214.EHE. ML:1.0 0.00014445 0.98 AML other m 2017-02-18T07:46:36.14
IV.T1214.HNE. ML:1.1 0.000202 1.34 AML other m 2017-02-18T07:46:36.14
IV.T1218.HNE. ML:1.4 0.000312 0.4 AML other m 2017-02-18T07:46:37.24
IV.T1218.EHE. ML:1.4 0.0003115 0.2 AML other m 2017-02-18T07:46:37.24
IV.T1218.HNN. ML:1.6 0.0005015000000000001 0.24 AML other m 2017-02-18T07:46:37.42
IV.T1218.EHN. ML:1.6 0.0005024999999999999 0.26 AML other m 2017-02-18T07:46:37.43
IV.T1247.HHE. ML:1.9 0.0003525 0.72 AML other m 2017-02-18T07:47:18.75
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
Waveforms Seismic signals in miniseed + resp format not available