Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 21-07-2019 and time 07:42:17 (Italy) in region 3 km E Castelsantangelo sul Nera (MC)

A magnitude ML 1.1 earthquake occured in region: 3 km E Castelsantangelo sul Nera (MC), on

  • 21-07-2019 05:42:17 (UTC)
  • 21-07-2019 07:42:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8810, 13.1910 at 8 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
Castelsantangelo sul Nera MC 3 281 281
Ussita MC 8 444 725
Visso MC 10 1107 1832
Montemonaco AP 11 604 2436
Preci PG 12 724 3160
Montegallo AP 12 523 3683
Norcia PG 13 4957 8640
Bolognola MC 13 142 8782
Montefortino FM 14 1178 9960
Arquata del Tronto AP 15 1178 11138
Acquacanina MC 17 121 11259
Amandola FM 18 3629 14888
Fiastra MC 18 559 15447
Fiordimonte MC 19 202 15649
Sarnano MC 20 3264 18913
Monte Cavallo MC 20 145 19058

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
49 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
61 Km N of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
96 Km W of Pescara (121014 inhabitants)
99 Km NW of Chieti (51815 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 2019-07-21
05:42:17		 42.8808 13.1908 8 2019-07-21
05:50:12		 Sala Sismica INGV-Roma 70756001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-21 05:42:17 ± 0.31
Latitude 42.8808 ± 0.0099
Longitude 13.1908 ± 0.0110
Depth (km) 8 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 70756001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1019
Semi-minor axis of confidence ellipse (meter) 445
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 20
Circular confidence region, given by single value of horizontal uncertainty (meter) 1020.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28239
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 70756001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-21 05:50:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.COR1.EHZ. 2019-07-21T05:42:42.30 3.0 undecidable manual S -0.09 0
IV.MML1.EHZ. 2019-07-21T05:42:28.36 0.6 undecidable manual S 326 31.3464 104 0 48
IV.FDMO.HHZ. 2019-07-21T05:42:25.12 0.6 undecidable manual S 334 19.1697 112 0.78 40
IV.MF5.EHZ. 2019-07-21T05:42:23.12 0.6 undecidable manual P 61 24.8529 107 0.75 40
IV.MML1.EHZ. 2019-07-21T05:42:23.45 0.1 undecidable manual P 326 31.3464 104 -0.17 93
IV.NRCA.HHZ. 2019-07-21T05:42:21.12 0.6 undecidable manual S 230 8.1807 133 0.08 49
IV.MMO1.EHZ. 2019-07-21T05:42:21.76 0.6 undecidable manual S 79 11.2776 124 -0.12 49
IV.MC2.EHZ. 2019-07-21T05:42:20.01 0.3 undecidable manual S 357 3.3966 156 -0.07 75
IV.FDMO.HHZ. 2019-07-21T05:42:20.40 0.6 negative manual P 334 19.1697 112 -0.9 38
IV.MMO1.EHZ. 2019-07-21T05:42:19.79 0.1 negative manual P 79 11.2776 124 -0.09 98
IV.NRCA.HHZ. 2019-07-21T05:42:19.52 0.1 positive manual P 230 8.1807 133 0.12 98
IV.MC2.EHZ. 2019-07-21T05:42:18.78 0.1 undecidable manual P 357 3.3966 156 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.2 0.000292 0.1 AML other m 2019-07-21T05:42:21.83
IV.NRCA.HNE. ML:1.2 0.0002825 0.1 AML other m 2019-07-21T05:42:21.83
IV.NRCA.HHN. ML:1.3 0.0003205 0.48 AML other m 2019-07-21T05:42:21.67
IV.NRCA.HNN. ML:1.4 0.0003675 0.5 AML other m 2019-07-21T05:42:21.66
IV.FDMO.HHE. ML:0.4 0.0000201 0.74 AML other m 2019-07-21T05:42:25.58
IV.FDMO.HHN. ML:0.4 0.0000204 1.42 AML other m 2019-07-21T05:42:25.96
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