Earthquake with magnitude of ML 0.4 on date 21-10-2019 and time 05:25:28 (Italy) in region 3 km S Arquata del Tronto (AP)

A magnitude ML 0.4 earthquake occured in region: 3 km S Arquata del Tronto (AP), on

  • 21-10-2019 03:25:28 (UTC)
  • 21-10-2019 05:25:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7470, 13.2890 at 14 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.

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 3 1178 1178
Accumoli RI 7 667 1845
Acquasanta Terme AP 10 2916 4761
Montegallo AP 11 523 5284
Amatrice RI 13 2657 7941
Norcia PG 17 4957 12898
Valle Castellana TE 17 977 13875
Montemonaco AP 17 604 14479
Cittareale RI 18 482 14961
Castelsantangelo sul Nera MC 20 281 15242
Roccafluvione AP 20 2010 17252

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km W of Teramo (54892 inhabitants)
45 Km N of L'Aquila (69753 inhabitants)
53 Km E of Foligno (57155 inhabitants)
56 Km E of Terni (111501 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
84 Km E of Perugia (166134 inhabitants)
84 Km NW of Chieti (51815 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
99 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 0.4 2019-10-21
03:25:28
42.7473 13.2893 14 2019-10-21
03:34:14
Sala Sismica INGV-Roma 73367051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-21 03:25:28 ± 0.07
Latitude 42.7473 ± 0.0045
Longitude 13.2893 ± 0.0073
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73367051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 604
Semi-minor axis of confidence ellipse (meter) 439
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 23
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) 0.43347
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 73367051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-21 03:34:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PE3.EHZ. 2019-10-21T03:25:47.17 3.0 positive manual P -0.04 0
IV.MML1.EHE. 2019-10-21T03:25:44.04 0.6 undecidable manual S 328 48.1185 94 0.49 42
IV.CSP1.EHZ. 2019-10-21T03:25:41.36 0.3 undecidable manual S 350 38.8278 96 0.28 68
IV.FDMO.HHZ. 2019-10-21T03:25:40.43 0.1 undecidable manual S 333 36.0417 97 0.09 95
IV.TERO.HHZ. 2019-10-21T03:25:38.48 0.1 undecidable manual S 118 29.1486 99 -0.03 97
IV.RM33.EHE. 2019-10-21T03:25:38.13 0.6 undecidable manual S 193 27.1506 101 0.14 48
IV.FAGN.. 2019-10-21T03:25:37.44 3.0 undecidable manual S 0
IV.MC2.EHZ. 2019-10-21T03:25:36.31 0.1 undecidable manual S 336 19.9689 108 0.18 96
IV.MML1.EHE. 2019-10-21T03:25:36.73 0.1 undecidable manual P 328 48.1185 94 -0.34 89
IV.CSP1.EHZ. 2019-10-21T03:25:35.61 0.1 undecidable manual P 350 38.8278 96 -0.03 96
IV.NRCA.HNN. 2019-10-21T03:25:35.05 0.6 undecidable manual S 304 17.1717 114 -0.38 47
IV.MMO1.EHZ. 2019-10-21T03:25:35.32 0.6 undecidable manual S 10 17.1717 114 -0.1 49
IV.FDMO.HHZ. 2019-10-21T03:25:35.00 0.1 undecidable manual P 333 36.0417 97 -0.22 94
IV.SMA1.EHZ. 2019-10-21T03:25:34.37 0.1 undecidable manual S 164 13.4754 123 -0.2 97
IV.TERO.HHZ. 2019-10-21T03:25:34.19 0.1 undecidable manual P 118 29.1486 99 0.03 98
IV.T1299.EHN. 2019-10-21T03:25:34.35 0.6 undecidable manual S 183 12.5763 126 -0.02 51
IV.RM33.EHE. 2019-10-21T03:25:33.96 0.1 undecidable manual P 193 27.1506 101 0.1 96
IV.MMO1.EHZ. 2019-10-21T03:25:32.38 0.1 undecidable manual P 10 17.1717 114 0 100
IV.T1299.EHN. 2019-10-21T03:25:32.01 0.1 undecidable manual P 183 12.5763 126 0.24 96
IV.MC2.EHZ. 2019-10-21T03:25:32.82 0.1 undecidable manual P 336 19.9689 108 0.04 99
IV.NRCA.HNN. 2019-10-21T03:25:32.20 0.1 undecidable manual P 304 17.1717 114 -0.19 97
IV.SMA1.EHZ. 2019-10-21T03:25:31.95 0.1 undecidable manual P 164 13.4754 123 0.06 99
IV.FAGN.. 2019-10-21T03:25:30.83 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.1 0.000012339155 0.12 AML other m 2019-10-21T03:25:34.52
IV.SMA1.EHN. ML:0.2 0.000012804805 0.16 AML other m 2019-10-21T03:25:34.58
IV.TERO.HHE. ML:0.6 0.000019884275 2.88 AML other m 2019-10-21T03:25:39.67
IV.TERO.HHN. ML:0.3 0.00000948783105 0.0592 AML other m 2019-10-21T03:25:38.74
IV.FDMO.HHE. ML:0.6 0.0000128387945 2.3408 AML other m 2019-10-21T03:25:40.40
IV.FDMO.HHN. ML:0.4 0.00000887248595 0.48 AML other m 2019-10-21T03:25:40.60
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