Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 18-10-2019 and time 04:37:06 (UTC) in region 2 km SW Arquata del Tronto (AP)

A magnitude ML 1.0 earthquake occured in region: 2 km SW Arquata del Tronto (AP), on

  • 18-10-2019 04:37:06 (UTC)
  • 18-10-2019 06:37:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7560, 13.2820 at 10 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 2 1178 1178
Accumoli RI 7 667 1845
Acquasanta Terme AP 11 2916 4761
Montegallo AP 11 523 5284
Amatrice RI 14 2657 7941
Norcia PG 16 4957 12898
Montemonaco AP 17 604 13502
Valle Castellana TE 18 977 14479
Cittareale RI 18 482 14961
Castelsantangelo sul Nera MC 19 281 15242
Roccafluvione AP 20 2010 17252

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km W of Teramo (54892 inhabitants)
46 Km N of L'Aquila (69753 inhabitants)
52 Km E of Foligno (57155 inhabitants)
56 Km E of Terni (111501 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
83 Km E of Perugia (166134 inhabitants)
83 Km W of Pescara (121014 inhabitants)
85 Km NW of Chieti (51815 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km NE of Tivoli (56533 inhabitants)
98 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 		ML 1.0 2019-10-18
04:37:06		 42.7555 13.2817 10 2019-10-18
05:01:19		 Sala Sismica INGV-Roma 73317551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-18 04:37:06 ± 0.06
Latitude 42.7555 ± 0.0027
Longitude 13.2817 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73317551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 551
Semi-minor axis of confidence ellipse (meter) 88
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 242
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.13130
Epicentral distance of station farthest from the epicenter (degree) 0.34084
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 9
Type of magnitude ML
Reference to an origin 73317551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-18 05:01:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2019-10-18T04:37:19.09 0.6 undecidable manual S 351 37.8288 50 0.08 48
IV.FDMO.HHZ. 2019-10-18T04:37:18.14 0.6 undecidable manual S 333 34.9428 50 -0.1 48
IV.TERO.HHZ. 2019-10-18T04:37:16.69 0.6 undecidable manual S 119 30.1476 50 -0.27 47
IV.FDMO.HHZ. 2019-10-18T04:37:13.05 1.0 positive manual P 333 34.9428 50 -0.14 24
IV.MC2.EHZ. 2019-10-18T04:37:13.76 0.6 undecidable manual S 336 18.87 119 -0.01 50
IV.CSP1.EHZ. 2019-10-18T04:37:13.59 1.0 positive manual P 351 37.8288 50 -0.05 24
IV.NRCA.HHZ. 2019-10-18T04:37:12.76 0.6 undecidable manual S 303 16.1727 123 -0.19 49
IV.TERO.HHZ. 2019-10-18T04:37:12.75 0.6 undecidable manual P 119 30.1476 50 0.3 47
IV.MMO1.EHZ. 2019-10-18T04:37:12.88 0.6 undecidable manual S 13 16.3725 122 -0.14 49
IV.SMA1.EHZ. 2019-10-18T04:37:12.28 0.6 undecidable manual S 162 14.5743 125 -0.21 49
IV.SMA1.EHZ. 2019-10-18T04:37:10.02 0.3 negative manual P 162 14.5743 125 0.15 74
IV.NRCA.HHZ. 2019-10-18T04:37:10.22 0.1 undecidable manual P 303 16.1727 123 0.08 100
IV.MMO1.EHZ. 2019-10-18T04:37:10.25 0.1 undecidable manual P 13 16.3725 122 0.07 100
IV.MC2.EHZ. 2019-10-18T04:37:10.79 1.0 undecidable manual P 336 18.87 119 0.18 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.2 0.00001418225 0.0992 AML other m 2019-10-18T04:37:13.27
IV.SMA1.EHN. ML:0.2 0.000014270515 0.2208 AML other m 2019-10-18T04:37:14.03
IV.NRCA.HNE. ML:1.3 0.00016666389999999998 0.1088 AML other m 2019-10-18T04:37:13.00
IV.NRCA.HNN. ML:1.4 0.00020989249999999997 0.1504 AML other m 2019-10-18T04:37:13.01
IV.NRCA.HHE. ML:1.3 0.0001696463 0.0992 AML other m 2019-10-18T04:37:13.00
IV.NRCA.HHN. ML:1.4 0.0001993722 0.1408 AML other m 2019-10-18T04:37:12.94
IV.TERO.HHE. ML:0.5 0.000015191525 0.08 AML other m 2019-10-18T04:37:16.82
IV.TERO.HHN. ML:0.6 0.000020864125 0.0608 AML other m 2019-10-18T04:37:17.02
IV.TERO.HNN. ML:1.1 0.000065749665 0.9824 AML other m 2019-10-18T04:37:18.56
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