Earthquake with magnitude of ML 1.4 on date 23-09-2020 and time 23:18:06 (Italy) in region 3 km E Roccafluvione (AP)

A magnitude ML 1.4 earthquake occured in region: 3 km E Roccafluvione (AP), on

  • 23-09-2020 21:18:06 (UTC)
  • 23-09-2020 23:18:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.86, 13.51 at 22 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 3 2010 2010
Venarotta AP 3 2066 4076
Ascoli Piceno AP 5 49407 53483
Palmiano AP 7 196 53679
Folignano AP 11 9241 62920
Rotella AP 12 906 63826
Force AP 12 1354 65180
Acquasanta Terme AP 13 2916 68096
Castignano AP 13 2796 70892
Valle Castellana TE 13 977 71869
Appignano del Tronto AP 14 1785 73654
Comunanza AP 14 3166 76820
Montedinove AP 14 488 77308
Montegallo AP 15 523 77831
Maltignano AP 15 2401 80232
Montefalcone Appennino FM 15 424 80656
Civitella del Tronto TE 16 5116 85772
Montemonaco AP 16 604 86376
Castel di Lama AP 17 8634 95010
Montalto delle Marche AP 17 2122 97132
Montefortino FM 17 1178 98310
Sant'Egidio alla Vibrata TE 17 9811 108121
Offida AP 17 5058 113179
Smerillo FM 18 365 113544
Montelparo FM 18 778 114322
Castorano AP 18 2380 116702
Santa Vittoria in Matenano FM 18 1330 118032
Rocca Santa Maria TE 19 537 118569
Amandola FM 19 3629 122198
Ancarano TE 19 1857 124055
Colli del Tronto AP 20 3668 127723
Arquata del Tronto AP 20 1178 128901

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Teramo (54892 inhabitants)
57 Km N of L'Aquila (69753 inhabitants)
65 Km NW of Montesilvano (53738 inhabitants)
67 Km E of Foligno (57155 inhabitants)
72 Km NW of Pescara (121014 inhabitants)
78 Km NW of Chieti (51815 inhabitants)
78 Km E of Terni (111501 inhabitants)
85 Km S of Ancona (100861 inhabitants)
96 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
Reviewed
Rev100
ML 1.4 2020-09-23
21:18:06
42.86 13.51 22 2020-09-23
21:38:55
Sala Sismica INGV-Roma 83169971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-23 21:18:06 ± 0.21
Latitude 42.86 ± 0.01
Longitude 13.51 ± 0.01
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83169971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 691
Semi-minor axis of confidence ellipse (meter) 345
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 107
Circular confidence region, given by single value of horizontal uncertainty (meter) 690
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.1304
Epicentral distance of station farthest from the epicenter (degree) 0.41009
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 83169971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-23 21:38:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RM33.EHZ. 2020-09-23T21:18:22.50 0.6 undecidable manual S 212 0.4101 107 0.93 36
IV.FDMO.HHZ. 2020-09-23T21:18:20.00 0.6 undecidable manual S 300 0.3588 110 -0.15 47
IV.CSP1.EHZ. 2020-09-23T21:18:19.11 0.6 undecidable manual S 317 0.3256 113 -0.12 48
IV.NRCA.HHZ. 2020-09-23T21:18:18.63 0.3 undecidable manual S 266 0.2923 116 0.31 68
IV.MC2.EHZ. 2020-09-23T21:18:17.16 0.6 undecidable manual S 283 0.2428 121 0.12 48
IV.SMA1.EHZ. 2020-09-23T21:18:17.65 0.3 undecidable manual S 210 0.2599 119 0.17 71
IV.MNTT.EHZ. 2020-09-23T21:18:16.86 0.3 undecidable manual S 17 0.2149 125 0.51 67
IV.TERO.HHZ. 2020-09-23T21:18:16.99 0.6 undecidable manual S 164 0.2428 121 -0.05 49
IV.RM33.EHZ. 2020-09-23T21:18:15.47 0.6 negative manual P 212 0.4101 107 0.25 45
IV.MTRA.HNZ. 2020-09-23T21:18:14.14 0.6 undecidable manual S 220 0.1304 141 -0.37 47
IV.FDMO.HHZ. 2020-09-23T21:18:14.27 0.6 positive manual P 300 0.3588 110 -0.13 47
IV.MMO1.EHZ. 2020-09-23T21:18:14.26 0.6 undecidable manual S 288 0.1421 139 -0.47 46
IV.NRCA.HHZ. 2020-09-23T21:18:13.32 0.1 positive manual P 266 0.2923 116 -0.03 98
IV.CSP1.EHZ. 2020-09-23T21:18:13.11 0.6 undecidable manual P 317 0.3256 113 -0.76 40
IV.TERO.HHZ. 2020-09-23T21:18:12.44 0.3 positive manual P 164 0.2428 121 -0.17 72
IV.MC2.EHZ. 2020-09-23T21:18:12.59 1.0 negative manual P 283 0.2428 121 -0.01 25
IV.SMA1.EHZ. 2020-09-23T21:18:12.88 0.1 positive manual P 210 0.2599 119 0.03 98
IV.MNTT.EHZ. 2020-09-23T21:18:12.26 0.1 positive manual P 17 0.2149 125 0.05 99
IV.MMO1.EHZ. 2020-09-23T21:18:11.00 0.3 positive manual P 288 0.1421 139 -0.27 72
IV.OFFI.HHZ. 2020-09-23T21:18:11.35 0.1 negative manual P 58 0.1502 137 -0.01 100
IV.MTRA.HNZ. 2020-09-23T21:18:10.99 0.6 positive manual P 220 0.1304 141 -0.15 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.6 0.0002415 0.52 AML other m 2020-09-23T21:18:14.50
IV.MTRA.EHN. ML:1.4 0.000172 0.16 AML other m 2020-09-23T21:18:14.48
IV.TERO.HHN. ML:1.1 6.09E-5 0.6 AML other m 2020-09-23T21:18:17.13
IV.TERO.HHE. ML:1.3 8.045E-5 0.2 AML other m 2020-09-23T21:18:17.34
IV.SMA1.EHE. ML:1.4 0.0001077 1.06 AML other m 2020-09-23T21:18:18.03
IV.SMA1.EHN. ML:1.5 0.000135 1.74 AML other m 2020-09-23T21:18:18.94
IV.NRCA.HHE. ML:1.5 0.00011025 1.56 AML other m 2020-09-23T21:18:18.88
IV.NRCA.HHN. ML:1.6 0.0001365 0.16 AML other m 2020-09-23T21:18:18.96
IV.FDMO.HHE. ML:1.1 3.755E-5 0.52 AML other m 2020-09-23T21:18:20.26
IV.FDMO.HHN. ML:1.1 3.815E-5 0.32 AML other m 2020-09-23T21:18:20.36
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