Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 1.3 on date 04-08-2017 and time 07:12:39 (Italy) in region 4 km SW Arquata del Tronto (AP)

A magnitude Md 1.3 earthquake occured in region: 4 km SW Arquata del Tronto (AP), on

  • 04-08-2017 05:12:39 (UTC)
  • 04-08-2017 07:12:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7360, 13.2780 at 12 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 4 1178 1178
Accumoli RI 5 667 1845
Acquasanta Terme AP 11 2916 4761
Amatrice RI 12 2657 7418
Montegallo AP 13 523 7941
Cittareale RI 16 482 8423
Norcia PG 16 4957 13380
Valle Castellana TE 18 977 14357
Montemonaco AP 19 604 14961

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km W of Teramo (54892 inhabitants)
44 Km N of L'Aquila (69753 inhabitants)
53 Km E of Foligno (57155 inhabitants)
55 Km E of Terni (111501 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
85 Km NW of Chieti (51815 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
100 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 		Md 1.3 2017-08-04
05:12:39		 42.7363 13.2782 12 2017-08-04
05:20:45		 Sala Sismica INGV-Roma 48669141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-08-04 05:12:39 ± 0.09
Latitude 42.7363 ± 0.0027
Longitude 13.2782 ± 0.0086
Depth (km) 12 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 48669141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 709
Semi-minor axis of confidence ellipse (meter) 169
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 283
Circular confidence region, given by single value of horizontal uncertainty (meter) 710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 261
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.05
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.18706
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 4
Magnitude information

Md:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 2
Type of magnitude Md
Reference to an origin 48669141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-08-04 05:20:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.ZAG.BHZ. 2017-08-04T05:14:13.66 3.0 undecidable manual Sn -4.14 0
IV.RESU.HHZ. 2017-08-04T05:14:09.64 3.0 undecidable manual Sn -2.01 0
IV.GMB.BHZ. 2017-08-04T05:14:07.84 3.0 undecidable manual Sn -0.23 0
IV.LINA.HHZ. 2017-08-04T05:13:48.38 3.0 undecidable manual Pn 0.24 0
OX.CIMO.HHZ. 2017-08-04T05:13:47.00 3.0 undecidable manual Pg 16.9 0
IV.MMN.HHZ. 2017-08-04T05:13:13.89 3.0 undecidable manual Pg 10.58 0
IV.LAV9.HHZ. 2017-08-04T05:12:51.77 3.0 undecidable manual S -0.99 0
IV.VAGA.HHZ. 2017-08-04T05:12:51.75 3.0 undecidable manual Sg 0.24 0
IV.MOMA.HHZ. 2017-08-04T05:12:48.80 3.0 undecidable manual Pg 2.81 0
IV.PP3.EHZ. 2017-08-04T05:12:48.61 3.0 positive manual P -1.34 0
IV.MC2.EHZ. 2017-08-04T05:12:47.60 0.3 undecidable manual S 340 20.7681 95 0.04 97
IV.T1245.HHZ. 2017-08-04T05:12:46.04 0.6 undecidable manual S 331 15.2736 103 -0.06 65
IV.T1218.EHZ. 2017-08-04T05:12:46.14 0.6 undecidable manual S 241 15.1737 103 0.05 65
IV.T1214.EHZ. 2017-08-04T05:12:44.07 0.3 undecidable manual S 294 6.1938 143 -0.03 100
IV.MC2.EHZ. 2017-08-04T05:12:44.14 0.3 undecidable manual P 340 20.7681 95 -0.04 97
IV.T1218.EHZ. 2017-08-04T05:12:43.27 0.3 undecidable manual P 241 15.1737 103 -0.06 98
IV.T1245.HHZ. 2017-08-04T05:12:43.37 0.3 undecidable manual P 331 15.2736 103 0.03 98
IV.MMO1.EHZ. 2017-08-04T05:12:43.79 3.0 undecidable manual P -0.56 0
IV.T1214.EHZ. 2017-08-04T05:12:42.24 0.3 undecidable manual P 294 6.1938 143 0.06 99
IV.SMA1.EHZ. 2017-08-04T05:12:42.94 3.0 negative manual Pg 1.53 0
IV.ARRO.EHZ. 2017-08-04T05:12:41.13 3.0 undecidable manual P -1.78 0
IV.LRP.EHZ. 2017-08-04T05:12:40.79 3.0 undecidable manual S 0
IV.VVLD.HHZ. 2017-08-04T05:12:39.57 3.0 undecidable manual S -6.99 0
IV.LRP.EHZ. 2017-08-04T05:12:38.03 3.0 undecidable manual P 0
IV.GIUL.HHZ. 2017-08-04T05:12:37.15 3.0 undecidable manual P 0.21 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download