Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 02-04-2019 and time 16:42:56 (Italy) in region 8 km W Arquata del Tronto (AP)

A magnitude ML 1.0 earthquake occured in region: 8 km W Arquata del Tronto (AP), on

  • 02-04-2019 14:42:56 (UTC)
  • 02-04-2019 16:42:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7640, 13.2030 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 8 1178 1178
Accumoli RI 8 667 1845
Norcia PG 10 4957 6802
Montegallo AP 14 523 7325
Castelsantangelo sul Nera MC 15 281 7606
Cascia PG 16 3217 10823
Amatrice RI 16 2657 13480
Cittareale RI 17 482 13962
Acquasanta Terme AP 17 2916 16878
Montemonaco AP 18 604 17482
Preci PG 19 724 18206

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
49 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
91 Km NW of Chieti (51815 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
98 Km E of Viterbo (67173 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 2019-04-02
14:42:56		 42.7637 13.2032 11 2019-04-02
14:49:57		 Sala Sismica INGV-Roma 67193531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-04-02 14:42:56 ± 0.08
Latitude 42.7637 ± 0.0045
Longitude 13.2032 ± 0.0073
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 67193531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 551
Semi-minor axis of confidence ellipse (meter) 516
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
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) 139
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.09533
Epicentral distance of station farthest from the epicenter (degree) 0.41369
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 67193531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-04-02 14:49:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2019-04-02T14:43:06.24 0.3 undecidable manual S 178 28.2495 50 -0.08 73
IV.MNTT.EHZ. 2019-04-02T14:43:05.25 0.3 negative manual P 44 45.9207 50 0.49 65
IV.CSP1.EHZ. 2019-04-02T14:43:03.15 0.6 positive manual P 0 36.4413 50 -0.14 48
IV.TERO.HHZ. 2019-04-02T14:43:03.21 1.0 undecidable manual P 115 36.2415 50 -0.05 24
IV.MMO1.EHZ. 2019-04-02T14:43:03.32 0.6 undecidable manual S 34 18.0708 120 -0.13 49
IV.MTRA.EHZ. 2019-04-02T14:43:02.59 0.6 undecidable manual S 93 15.7731 124 -0.17 49
IV.RM33.EHZ. 2019-04-02T14:43:02.07 0.6 undecidable manual P 178 28.2495 50 0.04 49
IV.FDMO.HHE. 2019-04-02T14:43:02.25 0.3 undecidable manual P 343 31.746 50 -0.31 69
IV.NRCA.HHZ. 2019-04-02T14:43:01.36 0.6 undecidable manual S 317 10.5783 135 0 51
IV.MMO1.EHZ. 2019-04-02T14:43:00.30 0.1 negative manual P 34 18.0708 120 -0.08 100
IV.MTRA.EHZ. 2019-04-02T14:43:00.11 0.6 undecidable manual P 93 15.7731 124 0.13 49
IV.MC2.EHZ. 2019-04-02T14:43:00.17 0.6 negative manual P 356 16.4724 123 0.08 50
IV.NRCA.HHZ. 2019-04-02T14:42:59.29 0.1 positive manual P 317 10.5783 135 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.0003185 0.12 AML other m 2019-04-02T14:43:01.87
IV.NRCA.HNE. ML:1.4 0.00029760795 0.1408 AML other m 2019-04-02T14:43:01.42
IV.NRCA.HNN. ML:1.3 0.0002589943 0.48 AML other m 2019-04-02T14:43:01.40
IV.MTRA.EHE. ML:0.6 0.000034306989999999995 0.1216 AML other m 2019-04-02T14:43:02.67
IV.MTRA.EHN. ML:0.6 0.000040951715 0.224 AML other m 2019-04-02T14:43:02.57
IV.RM33.EHE. ML:0.5 0.000012509326500000001 0.3392 AML other m 2019-04-02T14:43:06.52
IV.RM33.EHN. ML:0.7 0.00002278225 0.2624 AML other m 2019-04-02T14:43:06.49
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