Earthquake with magnitude of ML 1.6 on date 23-10-2020 and time 03:05:41 (UTC) in region 4 km E Roccafluvione (AP)

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

  • 23-10-2020 03:05:41 (UTC)
  • 23-10-2020 05:05:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.85, 13.52 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 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
Acquasanta Terme AP 12 2916 66742
Valle Castellana TE 13 977 67719
Force AP 13 1354 69073
Castignano AP 13 2796 71869
Appignano del Tronto AP 14 1785 73654
Maltignano AP 14 2401 76055
Comunanza AP 15 3166 79221
Montegallo AP 15 523 79744
Montedinove AP 15 488 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
Offida AP 17 5058 112001
Montefortino FM 18 1178 113179
Rocca Santa Maria TE 18 537 113716
Smerillo FM 18 365 114081
Castorano AP 18 2380 116461
Ancarano TE 19 1857 118318
Montelparo FM 19 778 119096
Santa Vittoria in Matenano FM 19 1330 120426
Colli del Tronto AP 19 3668 124094
Amandola FM 20 3629 127723
Campli TE 20 7209 134932
Arquata del Tronto AP 20 1178 136110

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 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)
71 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 1.6 2020-10-23
03:05:41
42.85 13.52 20 2020-10-23
03:10:55
Sala Sismica INGV-Roma 84046091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-23 03:05:41 ± 0.12
Latitude 42.85 ± 0.00
Longitude 13.52 ± 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 84046091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 456
Semi-minor axis of confidence ellipse (meter) 182
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
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 30
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.40649
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 84046091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-23 03:10:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2020-10-23T03:05:55.44 3.0 undecidable manual P 0.31 0
IV.FDMO.HHZ. 2020-10-23T03:05:55.69 0.6 undecidable manual S 301 0.3651 107 0.1 48
IV.CSP1.EHZ. 2020-10-23T03:05:54.81 0.6 undecidable manual S 317 0.3318 109 0.15 48
IV.EL6.EHZ. 2020-10-23T03:05:53.00 3.0 positive manual P -0.48 0
IV.NRCA.HHZ. 2020-10-23T03:05:53.81 0.6 undecidable manual S 267 0.295 112 0.18 47
IV.MC2.EHZ. 2020-10-23T03:05:52.52 0.3 undecidable manual S 285 0.2473 117 0.17 72
IV.MNTT.EHZ. 2020-10-23T03:05:52.06 0.6 undecidable manual S 15 0.2194 121 0.42 45
IV.SMA1.EHZ. 2020-10-23T03:05:52.89 0.6 undecidable manual S 211 0.2563 116 0.3 46
IV.SAP2.EHZ. 2020-10-23T03:05:52.82 0.6 undecidable manual S 341 0.2608 115 0.11 48
IV.TERO.HHZ. 2020-10-23T03:05:52.10 0.6 undecidable manual S 164 0.2356 118 0.05 48
IV.VCEL.EHZ. 2020-10-23T03:05:52.31 3.0 negative manual P -0.17 0
IV.OFFI.HHZ. 2020-10-23T03:05:50.06 0.3 undecidable manual S 56 0.1511 133 0.07 74
IV.RM33.EHZ. 2020-10-23T03:05:50.68 0.3 undecidable manual P 213 0.4065 105 0.16 69
IV.CAMP.HHZ. 2020-10-23T03:05:49.03 1.0 positive manual P 194 0.3238 110 -0.14 24
IV.MMO1.EHZ. 2020-10-23T03:05:49.72 0.6 undecidable manual S 290 0.1466 134 -0.2 47
IV.MF5.EHZ. 2020-10-23T03:05:49.67 0.6 undecidable manual S 343 0.1439 135 -0.18 48
IV.FDMO.HHZ. 2020-10-23T03:05:49.60 0.6 negative manual P 301 0.3651 107 -0.23 46
IV.MTRA.HNZ. 2020-10-23T03:05:49.28 0.6 undecidable manual S 223 0.1277 139 -0.24 48
IV.NRCA.HHZ. 2020-10-23T03:05:48.67 0.1 positive manual P 267 0.295 112 -0.03 97
IV.GUMA.HNZ. 2020-10-23T03:05:48.29 0.1 undecidable manual P 328 0.25 117 0.28 93
IV.CSP1.EHZ. 2020-10-23T03:05:48.77 0.1 undecidable manual P 317 0.3318 109 -0.53 86
IV.MC2.EHZ. 2020-10-23T03:05:48.04 1.0 negative manual P 285 0.2473 117 0.08 24
IV.SMA1.EHZ. 2020-10-23T03:05:48.15 0.1 positive manual P 211 0.2563 116 0.05 97
IV.SAP2.EHZ. 2020-10-23T03:05:48.52 0.1 undecidable manual P 341 0.2608 115 0.35 91
IV.TERO.HHZ. 2020-10-23T03:05:47.62 0.6 undecidable manual P 164 0.2356 118 -0.17 48
IV.MNTT.EHZ. 2020-10-23T03:05:47.57 0.1 positive manual P 15 0.2194 121 0.02 98
IV.MTRA.HNZ. 2020-10-23T03:05:46.26 0.1 negative manual P 223 0.1277 139 -0.07 99
IV.OFFI.HHZ. 2020-10-23T03:05:46.57 0.1 negative manual P 56 0.1511 133 -0.03 100
IV.MMO1.EHZ. 2020-10-23T03:05:46.36 0.1 undecidable manual P 290 0.1466 134 -0.2 96
IV.MF5.EHZ. 2020-10-23T03:05:46.26 0.1 undecidable manual P 343 0.1439 135 -0.26 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.8 0.0004315 0.48 AML other m 2020-10-23T03:05:49.78
IV.MTRA.EHN. ML:1.4 0.000175 0.42 AML other m 2020-10-23T03:05:49.76
IV.TERO.HHN. ML:1.5 0.000135 0.08 AML other m 2020-10-23T03:05:52.34
IV.TERO.HHE. ML:1.5 0.0001435 0.16 AML other m 2020-10-23T03:05:52.32
IV.MNTT.EHN. ML:1.9 0.0003625 0.34 AML other m 2020-10-23T03:05:52.50
IV.SMA1.EHN. ML:1.4 0.0001085 0.28 AML other m 2020-10-23T03:05:53.20
IV.SMA1.EHE. ML:1.3 9.395E-5 0.6 AML other m 2020-10-23T03:05:53.30
IV.MNTT.EHE. ML:1.8 0.0002775 0.62 AML other m 2020-10-23T03:05:54.28
IV.NRCA.HHE. ML:1.9 0.0002935 0.46 AML other m 2020-10-23T03:05:54.32
IV.NRCA.HHN. ML:1.9 0.0003195 0.12 AML other m 2020-10-23T03:05:54.39
IV.RM33.EHN. ML:1.2 4.545E-5 0.28 AML other m 2020-10-23T03:05:57.95
IV.RM33.EHE. ML:1.2 4.37E-5 0.66 AML other m 2020-10-23T03:05:58.70
IV.CAMP.HHN. ML:0.8 2.05E-5 0.38 AML other m 2020-10-23T03:05:59.43
IV.CAMP.HHE. ML:0.8 1.755E-5 0.72 AML other m 2020-10-23T03:06:01.18
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