Earthquake with magnitude of ML 0.9 on date 21-10-2020 and time 01:51:24 (UTC) in region 3 km E Roccafluvione (AP)

A magnitude ML 0.9 earthquake occured in region: 3 km E Roccafluvione (AP), on

  • 21-10-2020 01:51:24 (UTC)
  • 21-10-2020 03:51:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.85, 13.51 at 20 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 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 13 1354 65180
Acquasanta Terme AP 13 2916 68096
Valle Castellana TE 13 977 69073
Castignano AP 13 2796 71869
Appignano del Tronto AP 14 1785 73654
Comunanza AP 14 3166 76820
Maltignano AP 14 2401 79221
Montedinove AP 15 488 79709
Montegallo AP 15 523 80232
Civitella del Tronto TE 15 5116 85348
Montefalcone Appennino FM 16 424 85772
Montemonaco AP 16 604 86376
Castel di Lama AP 16 8634 95010
Sant'Egidio alla Vibrata TE 17 9811 104821
Montalto delle Marche AP 17 2122 106943
Montefortino FM 17 1178 108121
Offida AP 17 5058 113179
Smerillo FM 18 365 113544
Castorano AP 18 2380 115924
Rocca Santa Maria TE 18 537 116461
Montelparo FM 19 778 117239
Ancarano TE 19 1857 119096
Santa Vittoria in Matenano FM 19 1330 120426
Amandola FM 19 3629 124055
Colli del Tronto AP 19 3668 127723
Arquata del Tronto AP 20 1178 128901
Campli TE 20 7209 136110

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Teramo (54892 inhabitants)
56 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 0.9 2020-10-21
01:51:24
42.85 13.51 20 2020-10-21
02:37:34
Sala Sismica INGV-Roma 83973871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-21 01:51:24 ± 0.08
Latitude 42.85 ± 0.00
Longitude 13.51 ± 0.01
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83973871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 402
Semi-minor axis of confidence ellipse (meter) 310
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 121
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.1286
Epicentral distance of station farthest from the epicenter (degree) 0.36243
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:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 83973871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-21 02:37:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MTRA.EHZ. 2020-10-21T01:51:31.60 0.3 undecidable manual S 222 0.1286 138 0.02 75
IV.MF5.EHZ. 2020-10-21T01:51:31.86 0.3 undecidable manual S 344 0.1412 135 0.03 75
IV.MMO1.EHZ. 2020-10-21T01:51:31.87 0.3 undecidable manual S 289 0.1448 134 -0.05 74
IV.FDMO.HHZ. 2020-10-21T01:51:31.78 0.6 positive manual P 301 0.3624 107 -0.09 47
IV.MC2.EHZ. 2020-10-21T01:51:30.20 0.6 positive manual P 284 0.2455 117 0.19 47
IV.CSP1.EHZ. 2020-10-21T01:51:30.87 1.0 negative manual P 317 0.3292 109 -0.46 22
IV.SMA1.EHZ. 2020-10-21T01:51:30.31 0.3 positive manual P 211 0.2581 115 0.11 72
IV.NRCA.HHZ. 2020-10-21T01:51:30.87 0.6 positive manual P 266 0.2941 112 0.11 47
IV.TERO.HHZ. 2020-10-21T01:51:29.76 0.1 undecidable manual P 164 0.2383 118 -0.15 95
IV.MNTT.EHZ. 2020-10-21T01:51:29.75 0.6 positive manual P 16 0.2176 120 0.16 48
IV.OFFI.HHZ. 2020-10-21T01:51:28.73 0.3 negative manual P 57 0.1502 133 0.07 74
IV.MTRA.EHZ. 2020-10-21T01:51:28.40 0.1 positive manual P 222 0.1286 138 0 100
IV.MF5.EHZ. 2020-10-21T01:51:28.45 0.6 positive manual P 344 0.1412 135 -0.1 49
IV.MMO1.EHZ. 2020-10-21T01:51:28.51 1.0 undecidable manual P 289 0.1448 134 -0.09 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1 7.615E-5 0.5 AML other m 2020-10-21T01:51:31.92
IV.MTRA.EHN. ML:0.9 5.225E-5 1.76 AML other m 2020-10-21T01:51:32.89
IV.TERO.HHN. ML:0.9 3.465E-5 0.16 AML other m 2020-10-21T01:51:34.35
IV.TERO.HHE. ML:1 4.675E-5 0.58 AML other m 2020-10-21T01:51:34.40
IV.SMA1.EHN. ML:0.8 2.735E-5 1.38 AML other m 2020-10-21T01:51:36.75
IV.NRCA.HHN. ML:1.1 4.815E-5 0.44 AML other m 2020-10-21T01:51:36.62
IV.NRCA.HHE. ML:1.2 6.12E-5 0.08 AML other m 2020-10-21T01:51:36.69
IV.SMA1.EHE. ML:0.7 2.12E-5 0.72 AML other m 2020-10-21T01:51:37.63
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download