Earthquake with magnitude of ML 1.6 on date 23-08-2019 and time 05:20:14 (Italy) in region 4 km W Roccafluvione (AP)

A magnitude ML 1.6 earthquake occured in region: 4 km W Roccafluvione (AP), on

  • 23-08-2019 03:20:14 (UTC)
  • 23-08-2019 05:20:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.86, 13.43 at 25 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
Roccafluvione AP 4 2010 2010
Palmiano AP 5 196 2206
Venarotta AP 6 2066 4272
Montegallo AP 8 523 4795
Montemonaco AP 10 604 5399
Acquasanta Terme AP 10 2916 8315
Comunanza AP 11 3166 11481
Montefortino FM 12 1178 12659
Ascoli Piceno AP 12 49407 62066
Force AP 13 1354 63420
Arquata del Tronto AP 14 1178 64598
Montefalcone Appennino FM 15 424 65022
Valle Castellana TE 15 977 65999
Amandola FM 15 3629 69628
Rotella AP 15 906 70534
Smerillo FM 16 365 70899
Folignano AP 17 9241 80140
Montedinove AP 18 488 80628
Castignano AP 18 2796 83424
Santa Vittoria in Matenano FM 19 1330 84754
Monte San Martino MC 19 765 85519
Appignano del Tronto AP 20 1785 87304
Montelparo FM 20 778 88082

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of Teramo (54892 inhabitants)
56 Km N of L'Aquila (69753 inhabitants)
60 Km E of Foligno (57155 inhabitants)
70 Km NW of Montesilvano (53738 inhabitants)
72 Km E of Terni (111501 inhabitants)
78 Km NW of Pescara (121014 inhabitants)
83 Km NW of Chieti (51815 inhabitants)
85 Km S of Ancona (100861 inhabitants)
89 Km E of Perugia (166134 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.6 2019-08-23
03:20:14
42.86 13.43 25 2019-08-23
03:27:50
Sala Sismica INGV-Roma 71722371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-23 03:20:14 ± 0.21
Latitude 42.86 ± 0.01
Longitude 13.43 ± 0.01
Depth (km) 25 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71722371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 912
Semi-minor axis of confidence ellipse (meter) 776
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 133
Circular confidence region, given by single value of horizontal uncertainty (meter) 910
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 233
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30757
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 71722371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-23 03:27:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SAMA.HHZ. 2019-08-23T03:20:51.38 3.0 undecidable manual Sn 0.02 0
IV.EL6.EHZ. 2019-08-23T03:20:34.40 3.0 undecidable manual S 0.14 0
IV.FDMO.HHZ. 2019-08-23T03:20:26.83 0.6 undecidable manual S 305 0.3076 120 0.14 48
IV.CSP1.EHZ. 2019-08-23T03:20:26.28 0.3 undecidable manual S 325 0.2851 122 0.15 72
IV.MNTT.EHZ. 2019-08-23T03:20:25.43 0.3 undecidable manual S 31 0.2356 128 0.5 65
IV.GUMA.HHZ. 2019-08-23T03:20:24.49 0.1 undecidable manual S 341 0.2149 131 0.04 99
IV.NRCA.HHZ. 2019-08-23T03:20:24.81 0.3 undecidable manual S 264 0.2338 128 -0.05 73
IV.MC2.EHZ. 2019-08-23T03:20:23.70 0.3 undecidable manual S 287 0.1844 136 -0.09 74
IV.MF5.EHZ. 2019-08-23T03:20:22.35 0.3 undecidable manual S 9 0.1304 146 -0.42 70
IV.GIGS.HHZ. 2019-08-23T03:20:22.92 3.0 positive manual Pg 0.14 0
IV.CSP1.EHZ. 2019-08-23T03:20:21.05 0.1 negative manual P 325 0.2851 122 0 98
IV.FDMO.HHZ. 2019-08-23T03:20:21.38 0.3 negative manual P 305 0.3076 120 0.01 73
IV.NRCA.HHZ. 2019-08-23T03:20:20.33 0.1 positive manual P 264 0.2338 128 0.01 99
IV.MNTT.EHZ. 2019-08-23T03:20:20.40 0.3 undecidable manual P 31 0.2356 128 0.05 73
IV.TERO.HHZ. 2019-08-23T03:20:20.48 3.0 undecidable manual P 0.09 0
IV.GUMA.HHZ. 2019-08-23T03:20:20.13 0.1 undecidable manual P 341 0.2149 131 0.05 98
IV.MC2.EHZ. 2019-08-23T03:20:19.70 0.1 undecidable manual P 287 0.1844 136 0.01 100
IV.MF5.EHZ. 2019-08-23T03:20:18.83 0.1 undecidable manual P 9 0.1304 146 -0.28 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2 0.0004225 0.68 AML other m 2019-08-23T03:20:25.20
IV.GUMA.HHE. ML:1.8 0.000297 0.3 AML other m 2019-08-23T03:20:24.70
IV.GUMA.HHN. ML:1.9 0.000321 0.24 AML other m 2019-08-23T03:20:24.76
IV.MF5.EHN. ML:1.4 0.0001555 0.34 AML other m 2019-08-23T03:20:24.77
IV.NRCA.HNE. ML:2 0.0003835 0.12 AML other m 2019-08-23T03:20:25.11
IV.NRCA.HHE. ML:2 0.0004225 0.12 AML other m 2019-08-23T03:20:25.05
IV.TERO.HHN. ML:1 3.915E-5 0.38 AML other m 2019-08-23T03:20:25.48
IV.NRCA.HHN. ML:2 0.000451 0.18 AML other m 2019-08-23T03:20:25.20
IV.TERO.HHE. ML:1 3.27E-5 0.16 AML other m 2019-08-23T03:20:25.56
IV.CSP1.EHN. ML:1.5 0.0001165 0.32 AML other m 2019-08-23T03:20:26.39
IV.CSP1.EHE. ML:1.4 8.91E-5 0.24 AML other m 2019-08-23T03:20:26.60
IV.FDMO.HHE. ML:1.2 5.05E-5 1.66 AML other m 2019-08-23T03:20:26.11
IV.FDMO.HHN. ML:1.2 5.715E-5 1.4 AML other m 2019-08-23T03:20:27.12
IV.GUMA.HNE. ML:1.7 0.00022031705 1 AML other m 2019-08-23T03:20:24.69
IV.MNTT.EHE. ML:1.7 0.00020928635 5.5792 AML other m 2019-08-23T03:20:25.90
IV.MNTT.EHN. ML:1.6 0.00017790055 0.3408 AML other m 2019-08-23T03:20:28.13
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download