Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 17-07-2019 and time 18:55:42 (Italy) in region 6 km W Arquata del Tronto (AP)

A magnitude ML 1.1 earthquake occured in region: 6 km W Arquata del Tronto (AP), on

  • 17-07-2019 16:55:42 (UTC)
  • 17-07-2019 18:55:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7550, 13.2350 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
Arquata del Tronto AP 6 1178 1178
Accumoli RI 7 667 1845
Norcia PG 12 4957 6802
Montegallo AP 13 523 7325
Acquasanta Terme AP 14 2916 10241
Amatrice RI 15 2657 12898
Cittareale RI 16 482 13380
Castelsantangelo sul Nera MC 17 281 13661
Montemonaco AP 18 604 14265
Cascia PG 19 3217 17482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
47 Km N of L'Aquila (69753 inhabitants)
49 Km E of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
79 Km SE of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
86 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
99 Km S of Ancona (100861 inhabitants)
100 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 1.1 2019-07-17
16:55:42		 42.7552 13.2347 11 2019-07-17
17:13:06		 Sala Sismica INGV-Roma 70659481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-17 16:55:42 ± 0.05
Latitude 42.7552 ± 0.0036
Longitude 13.2347 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 70659481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 406
Semi-minor axis of confidence ellipse (meter) 354
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 44
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28509
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 70659481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-17 17:13:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SPS2.HHZ. 2019-07-17T16:57:19.74 3.0 undecidable manual Sg 3.71 0
IV.TDS.HHZ. 2019-07-17T16:57:13.81 3.0 undecidable manual Sg 5.62 0
MN.TRI.HHZ. 2019-07-17T16:57:01.60 3.0 undecidable manual Sn -7.2 0
IV.SARZ.HHZ. 2019-07-17T16:56:52.73 3.0 undecidable manual Pg 9.04 0
IV.CLTA.HHZ. 2019-07-17T16:56:51.97 3.0 undecidable manual Pn -2.81 0
MN.TRI.HHZ. 2019-07-17T16:56:32.76 3.0 negative manual Pg 5.09 0
IV.RAVA.EHZ. 2019-07-17T16:56:29.63 3.0 undecidable manual Pg 3.8 0
IV.VENL.HNZ. 2019-07-17T16:56:25.85 3.0 undecidable manual Pn -0.94 0
CR.STON.BHZ. 2019-07-17T16:56:15.02 3.0 undecidable manual Pn -5.03 0
IV.FIAM.HHZ. 2019-07-17T16:56:06.38 3.0 undecidable manual S 4.22 0
IV.SSFR.HNZ. 2019-07-17T16:55:59.36 3.0 undecidable manual P -2.01 0
IV.MF5.EHZ. 2019-07-17T16:55:55.01 3.0 undecidable manual S 35 31.6461 50 1.05 0
IT.VNF1.HGZ. 2019-07-17T16:55:53.47 3.0 negative manual P -1.19 0
IV.CAMP.HHE. 2019-07-17T16:55:52.80 0.6 undecidable manual S 150 28.1496 50 -0.24 47
IV.RM33.EHZ. 2019-07-17T16:55:52.80 0.6 undecidable manual S 183 27.3504 50 -0.01 49
IV.FDMO.HHZ. 2019-07-17T16:55:51.02 3.0 undecidable manual P 0
IV.LNSS.HHE. 2019-07-17T16:55:51.96 0.6 undecidable manual S 223 23.1546 50 0.26 47
IV.MF5.EHZ. 2019-07-17T16:55:49.57 0.3 undecidable manual P 35 31.6461 50 0.26 70
IV.SMA1.EHZ. 2019-07-17T16:55:49.72 0.6 undecidable manual S 149 16.0728 123 0.09 49
IV.MMO1.EHE. 2019-07-17T16:55:49.89 0.6 undecidable manual S 25 17.6712 121 -0.21 48
IV.CAMP.HHE. 2019-07-17T16:55:48.58 0.3 undecidable manual P 150 28.1496 50 -0.2 71
IV.RM33.EHZ. 2019-07-17T16:55:48.54 0.1 undecidable manual P 183 27.3504 50 -0.11 97
IV.MTRA.EHZ. 2019-07-17T16:55:48.81 0.6 undecidable manual S 89 13.1757 129 -0.01 50
IV.NRCA.HHE. 2019-07-17T16:55:48.48 0.6 undecidable manual S 312 13.0758 129 -0.31 47
IV.LNSS.HHE. 2019-07-17T16:55:47.98 0.1 undecidable manual P 223 23.1546 50 -0.02 99
IV.MMO1.EHE. 2019-07-17T16:55:47.01 0.3 undecidable manual P 25 17.6712 121 -0.06 74
IV.MC2.EHE. 2019-07-17T16:55:47.57 1.0 undecidable manual P 348 17.7711 121 0.48 23
IV.NRCA.HHE. 2019-07-17T16:55:46.38 0.1 undecidable manual P 312 13.0758 129 0.05 100
IV.MTRA.EHZ. 2019-07-17T16:55:46.41 0.1 undecidable manual P 89 13.1757 129 0.07 100
IV.SMA1.EHZ. 2019-07-17T16:55:46.91 0.1 undecidable manual P 149 16.0728 123 0.11 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.2 0.00017363688 0.1408 AML other m 2019-07-17T16:55:49.14
IV.MTRA.EHN. ML:1.2 0.00018508174999999998 0.192 AML other m 2019-07-17T16:55:49.41
IV.SMA1.EHE. ML:0.9 0.000070060655 0.1024 AML other m 2019-07-17T16:55:49.95
IV.SMA1.EHN. ML:0.8 0.00005574122 0.2432 AML other m 2019-07-17T16:55:50.09
IV.RM33.HNE. ML:1.4 0.00014565339500000003 0.7424 AML other m 2019-07-17T16:56:05.75
IV.RM33.HNN. ML:1.4 0.00012928345 0.7424 AML other m 2019-07-17T16:56:07.23
IV.RM33.EHE. ML:1.0 0.000059889245 0.192 AML other m 2019-07-17T16:55:53.38
IV.RM33.EHN. ML:1.0 0.00005763204 0.1536 AML other m 2019-07-17T16:55:53.08
IV.MF5.EHE. ML:1.0 0.00004060695 0.64 AML other m 2019-07-17T16:55:57.07
IV.MF5.EHN. ML:1.0 0.000043965725 0.6016 AML other m 2019-07-17T16:55:55.58
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