Earthquake with magnitude of ML 0.8 on date 22-10-2020 and time 22:25:27 (Italy) in region 3 km SE Roccafluvione (AP)

A magnitude ML 0.8 earthquake occured in region: 3 km SE Roccafluvione (AP), on

  • 22-10-2020 20:25:27 (UTC)
  • 22-10-2020 22:25:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.84, 13.51 at 11 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 5 2066 4076
Ascoli Piceno AP 6 49407 53483
Palmiano AP 8 196 53679
Folignano AP 10 9241 62920
Acquasanta Terme AP 11 2916 65836
Valle Castellana TE 12 977 66813
Rotella AP 13 906 67719
Force AP 14 1354 69073
Montegallo AP 14 523 69596
Castignano AP 14 2796 72392
Appignano del Tronto AP 15 1785 74177
Maltignano AP 15 2401 76578
Civitella del Tronto TE 15 5116 81694
Comunanza AP 15 3166 84860
Montedinove AP 16 488 85348
Montemonaco AP 16 604 85952
Montefalcone Appennino FM 17 424 86376
Castel di Lama AP 17 8634 95010
Sant'Egidio alla Vibrata TE 17 9811 104821
Rocca Santa Maria TE 17 537 105358
Montefortino FM 18 1178 106536
Montalto delle Marche AP 18 2122 108658
Offida AP 18 5058 113716
Arquata del Tronto AP 19 1178 114894
Smerillo FM 19 365 115259
Ancarano TE 19 1857 117116
Castorano AP 19 2380 119496
Campli TE 19 7209 126705
Amandola FM 20 3629 130334
Montelparo FM 20 778 131112
Santa Vittoria in Matenano FM 20 1330 132442

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Teramo (54892 inhabitants)
55 Km N of L'Aquila (69753 inhabitants)
64 Km NW of Montesilvano (53738 inhabitants)
67 Km E of Foligno (57155 inhabitants)
71 Km NW of Pescara (121014 inhabitants)
77 Km NW of Chieti (51815 inhabitants)
77 Km E of Terni (111501 inhabitants)
86 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 0.8 2020-10-22
20:25:27
42.84 13.51 11 2020-10-22
20:45:58
Sala Sismica INGV-Roma 84037221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-22 20:25:27 ± 0.13
Latitude 42.84 ± 0.01
Longitude 13.51 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84037221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 878
Semi-minor axis of confidence ellipse (meter) 822
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 330
Circular confidence region, given by single value of horizontal uncertainty (meter) 880
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 15
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24641
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 84037221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-22 20:45:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIR.HHZ. 2020-10-22T20:26:29.19 3.0 undecidable manual Sg 7.16 0
IV.CRTC.HHZ. 2020-10-22T20:26:02.76 3.0 undecidable manual S 0.31 0
IV.RMP.HHZ. 2020-10-22T20:25:44.74 3.0 undecidable manual P -0.22 0
IV.SMA1.EHZ. 2020-10-22T20:25:38.32 0.3 undecidable manual S 211 0.2464 50 0.54 68
IV.MNTT.EHZ. 2020-10-22T20:25:37.47 0.3 undecidable manual S 16 0.2293 50 0.18 74
IV.TERO.HHZ. 2020-10-22T20:25:37.24 0.3 undecidable manual S 162 0.2293 50 -0.05 76
IV.OFFI.HHZ. 2020-10-22T20:25:35.91 0.3 undecidable manual S 54 0.1601 121 0.73 64
IV.MMO1.EHZ. 2020-10-22T20:25:34.90 0.3 undecidable manual S 294 0.1448 124 0.22 75
IV.MF5.EHZ. 2020-10-22T20:25:34.76 0.3 undecidable manual S 346 0.1502 123 -0.1 76
IV.TERO.HHZ. 2020-10-22T20:25:33.01 0.3 undecidable manual P 162 0.2293 50 -0.34 72
IV.SMA1.EHZ. 2020-10-22T20:25:33.52 0.1 undecidable manual P 211 0.2464 50 -0.1 100
IV.MNTT.EHZ. 2020-10-22T20:25:32.81 1.0 positive manual P 16 0.2293 50 -0.53 23
IV.MMO1.EHZ. 2020-10-22T20:25:31.70 1.0 undecidable manual P 294 0.1448 124 -0.14 25
IV.MF5.EHZ. 2020-10-22T20:25:31.60 0.3 undecidable manual P 346 0.1502 123 -0.34 73
IV.OFFI.HHZ. 2020-10-22T20:25:31.85 0.1 undecidable manual P 54 0.1601 121 -0.27 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OFFI.HHE. ML:0.8 5.0684305E-5 0.4608 AML other m 2020-10-22T20:25:37.96
IV.OFFI.HHN. ML:0.8 5.083422E-5 0.2688 AML other m 2020-10-22T20:25:36.40
IV.MNTT.EHE. ML:0.9 4.9196165E-5 0.2432 AML other m 2020-10-22T20:25:39.64
IV.MNTT.EHN. ML:1 5.7393975E-5 0.3328 AML other m 2020-10-22T20:25:37.84
IV.TERO.HHE. ML:0.7 3.214927E-5 0.0768 AML other m 2020-10-22T20:25:37.60
IV.TERO.HHN. ML:0.8 3.730306E-5 0.064 AML other m 2020-10-22T20:25:37.68
IV.TERO.HNE. ML:0.8 3.512265E-5 0.064 AML other m 2020-10-22T20:25:37.57
IV.SMA1.EHE. ML:0.4 1.5269335E-5 0.1664 AML other m 2020-10-22T20:25:39.40
IV.SMA1.EHN. ML:0.4 1.686785E-5 0.1152 AML other m 2020-10-22T20:25:39.10
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