Earthquake with magnitude of ML 1.5 on date 23-10-2020 and time 08:08:14 (Italy) in region 3 km E Roccafluvione (AP)

A magnitude ML 1.5 earthquake occured in region: 3 km E Roccafluvione (AP), on

  • 23-10-2020 06:08:14 (UTC)
  • 23-10-2020 08:08:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.85, 13.52 at 21 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
Venarotta AP 4 2066 4076
Ascoli Piceno AP 5 49407 53483
Palmiano AP 7 196 53679
Folignano AP 10 9241 62920
Rotella AP 12 906 63826
Force AP 12 1354 65180
Castignano AP 13 2796 67976
Acquasanta Terme AP 13 2916 70892
Valle Castellana TE 13 977 71869
Appignano del Tronto AP 13 1785 73654
Maltignano AP 14 2401 76055
Comunanza AP 14 3166 79221
Montedinove AP 14 488 79709
Montegallo AP 15 523 80232
Civitella del Tronto TE 15 5116 85348
Montefalcone Appennino FM 16 424 85772
Castel di Lama AP 16 8634 94406
Montemonaco AP 16 604 95010
Sant'Egidio alla Vibrata TE 17 9811 104821
Montalto delle Marche AP 17 2122 106943
Offida AP 17 5058 112001
Montefortino FM 17 1178 113179
Smerillo FM 18 365 113544
Castorano AP 18 2380 115924
Ancarano TE 18 1857 117781
Montelparo FM 18 778 118559
Rocca Santa Maria TE 19 537 119096
Santa Vittoria in Matenano FM 19 1330 120426
Colli del Tronto AP 19 3668 124094
Amandola FM 19 3629 127723
Campli TE 20 7209 134932

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)
64 Km NW of Montesilvano (53738 inhabitants)
67 Km E of Foligno (57155 inhabitants)
72 Km NW of Pescara (121014 inhabitants)
77 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 1.5 2020-10-23
06:08:14
42.85 13.52 21 2020-10-23
06:38:50
Sala Sismica INGV-Roma 84049741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-23 06:08:14 ± 0.14
Latitude 42.85 ± 0.01
Longitude 13.52 ± 0.01
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84049741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 690
Semi-minor axis of confidence ellipse (meter) 106
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
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) 108
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.36333
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 84049741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-23 06:38:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-10-23T06:08:28.03 0.1 undecidable manual S 300 0.3633 109 0.15 95
IV.CSP1.EHE. 2020-10-23T06:08:27.02 0.1 undecidable manual S 316 0.3301 111 0.08 97
IV.NRCA.HHZ. 2020-10-23T06:08:26.38 0.3 undecidable manual S 266 0.2959 114 0.37 69
IV.MC2.EHZ. 2020-10-23T06:08:25.09 0.3 undecidable manual S 284 0.2473 120 0.37 70
IV.SMA1.EHZ. 2020-10-23T06:08:25.34 0.3 undecidable manual S 211 0.2599 118 0.29 71
IV.TERO.HHZ. 2020-10-23T06:08:24.53 0.1 undecidable manual S 165 0.2392 121 0.01 100
IV.MMO1.EHZ. 2020-10-23T06:08:22.04 0.1 undecidable manual S 288 0.1466 137 -0.32 95
IV.OFFI.HHZ. 2020-10-23T06:08:22.93 0.1 undecidable manual S 57 0.1475 136 0.55 87
IV.CSP1.EHE. 2020-10-23T06:08:21.35 0.1 undecidable manual P 316 0.3301 111 -0.2 95
IV.MF5.EHZ. 2020-10-23T06:08:21.95 0.1 undecidable manual S 343 0.1403 138 -0.28 97
IV.NRCA.HHZ. 2020-10-23T06:08:21.04 0.1 undecidable manual P 266 0.2959 114 0.03 99
IV.FDMO.HHZ. 2020-10-23T06:08:21.96 0.1 undecidable manual P 300 0.3633 109 -0.13 95
IV.MTRA.HNZ. 2020-10-23T06:08:21.84 0.1 undecidable manual S 222 0.1313 140 -0.21 97
IV.MC2.EHZ. 2020-10-23T06:08:20.36 0.1 undecidable manual P 284 0.2473 120 0.09 98
IV.SMA1.EHZ. 2020-10-23T06:08:20.50 0.1 undecidable manual P 211 0.2599 118 0.04 99
IV.TERO.HHZ. 2020-10-23T06:08:20.05 0.1 undecidable manual P 165 0.2392 121 -0.1 98
IV.MNTT.EHZ. 2020-10-23T06:08:19.73 3.0 negative manual P -0.01 0
IV.MTRA.HNZ. 2020-10-23T06:08:18.61 0.1 undecidable manual P 222 0.1313 140 -0.12 100
IV.MF5.EHZ. 2020-10-23T06:08:18.64 0.1 undecidable manual P 343 0.1403 138 -0.19 99
IV.MMO1.EHZ. 2020-10-23T06:08:18.71 0.1 undecidable manual P 288 0.1466 137 -0.19 98
IV.OFFI.HHZ. 2020-10-23T06:08:18.95 0.1 undecidable manual P 57 0.1475 136 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:1.5 0.00019 1.7 AML other m 2020-10-23T06:08:21.07
IV.MTRA.EHE. ML:1.7 0.000296 1.52 AML other m 2020-10-23T06:08:22.16
IV.MF5.EHN. ML:1.3 0.00010855 0.3 AML other m 2020-10-23T06:08:22.07
IV.MF5.EHE. ML:1.2 0.00010625 0.3 AML other m 2020-10-23T06:08:22.19
IV.OFFI.HHN. ML:1.6 0.0002585 0.26 AML other m 2020-10-23T06:08:23.43
IV.OFFI.HHE. ML:1.6 0.0002265 0.28 AML other m 2020-10-23T06:08:23.41
IV.TERO.HHE. ML:1.6 0.000187 0.16 AML other m 2020-10-23T06:08:24.68
IV.TERO.HHN. ML:1.6 0.000159 0.8 AML other m 2020-10-23T06:08:25.71
IV.SMA1.EHN. ML:1.3 8.45E-5 0.28 AML other m 2020-10-23T06:08:25.58
IV.SMA1.EHE. ML:1.2 6.21E-5 0.62 AML other m 2020-10-23T06:08:25.67
IV.NRCA.HHN. ML:1.8 0.000255 0.14 AML other m 2020-10-23T06:08:26.78
IV.NRCA.HHE. ML:1.8 0.0002665 0.08 AML other m 2020-10-23T06:08:26.93
IV.NRCA.HNE. ML:1.8 0.000224 0.08 AML other m 2020-10-23T06:08:26.93
IV.NRCA.HNN. ML:1.9 0.0002725 1.4 AML other m 2020-10-23T06:08:27.72
IV.FDMO.HHE. ML:1 3.235E-5 0.2 AML other m 2020-10-23T06:08:28.13
IV.FDMO.HHN. ML:1 2.905E-5 1.24 AML other m 2020-10-23T06:08:28.23
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