Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 15-10-2020 and time 02:56:21 (Italy) in region 3 km E Roccafluvione (AP)

A magnitude ML 1.1 earthquake occured in region: 3 km E Roccafluvione (AP), on

  • 15-10-2020 00:56:21 (UTC)
  • 15-10-2020 02:56:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8540, 13.5160 at 18 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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 12 1354 65180
Acquasanta Terme AP 13 2916 68096
Castignano AP 13 2796 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
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 17 1178 113179
Smerillo FM 18 365 113544
Castorano AP 18 2380 115924
Ancarano TE 19 1857 117781
Montelparo FM 19 778 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
Arquata del Tronto AP 20 1178 136110

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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.1 2020-10-15
00:56:21		 42.8535 13.516 18 2021-02-26
14:56:12		 Bollettino Sismico Italiano INGV 85797301
Reviewed
Rev100 		ML 1.0 2020-10-15
00:56:21		 42.854 13.5183 11 2020-10-15
01:09:46		 Sala Sismica INGV-Roma 83787111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-15 00:56:21 ± 0.2
Latitude 42.8535 ± 0.0045
Longitude 13.5160 ± 0.0074
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85797301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 629
Semi-minor axis of confidence ellipse (meter) 119
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 283
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
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 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.13040
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 11
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 83787111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-15 01:09:46

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85797301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-28 15:31:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-10-15T00:56:34.74 0.6 undecidable manual S 300 40.3263 104 0.16 63
IV.CSP1.EHZ. 2020-10-15T00:56:33.64 0.6 undecidable manual S 316 36.5412 106 0.02 65
IV.SMA1.EHZ. 2020-10-15T00:56:32.00 0.6 undecidable manual S 211 28.749 111 0.35 61
IV.T1299.HNZ. 2020-10-15T00:56:32.87 0.6 undecidable manual S 218 30.9468 109 0.7 54
IV.TERO.HHZ. 2020-10-15T00:56:31.03 0.6 undecidable manual S 164 26.5512 114 -0.07 66
IV.MNTT.EHZ. 2020-10-15T00:56:31.24 0.6 undecidable manual S 16 24.0537 117 0.76 55
IV.SAP2.EHZ. 2020-10-15T00:56:31.91 0.6 undecidable manual S 341 28.5492 112 0.31 62
IV.MTRA.EHZ. 2020-10-15T00:56:28.41 0.6 undecidable manual S 222 14.4744 134 0.02 67
IV.CSP1.EHZ. 2020-10-15T00:56:28.00 0.3 undecidable manual P 316 36.5412 106 -0.35 91
IV.MF5.EHZ. 2020-10-15T00:56:28.49 0.6 undecidable manual S 343 15.5733 131 -0.12 66
IV.FDMO.HHZ. 2020-10-15T00:56:28.59 0.3 undecidable manual P 300 40.3263 104 -0.31 91
IV.MMO1.EHZ. 2020-10-15T00:56:28.57 0.6 undecidable manual S 288 16.1727 130 -0.16 65
IV.SAP2.EHZ. 2020-10-15T00:56:27.85 0.3 undecidable manual P 341 28.5492 112 0.67 84
IV.SMA1.EHZ. 2020-10-15T00:56:27.07 0.3 undecidable manual P 211 28.749 111 -0.14 97
IV.T1299.HNZ. 2020-10-15T00:56:27.57 0.3 undecidable manual P 218 30.9468 109 0.06 97
IV.MNTT.EHZ. 2020-10-15T00:56:26.58 0.3 undecidable manual P 16 24.0537 117 0.04 100
IV.TERO.HHZ. 2020-10-15T00:56:26.60 0.3 undecidable manual P 164 26.5512 114 -0.29 94
IV.MF5.EHZ. 2020-10-15T00:56:25.20 0.3 undecidable manual P 343 15.5733 131 -0.25 96
IV.MMO1.EHZ. 2020-10-15T00:56:25.25 0.3 undecidable manual P 288 16.1727 130 -0.28 96
IV.OFFI.HHZ. 2020-10-15T00:56:25.52 0.3 undecidable manual P 57 16.4724 129 -0.04 100
IV.MTRA.EHZ. 2020-10-15T00:56:25.16 0.3 undecidable manual P 222 14.4744 134 -0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MF5.EHN. ML:1.0 0.00006467384500000001 0.3 AML other m 2020-10-15T00:56:28.76
IV.MF5.EHE. ML:0.9 0.000051538025 0.62 AML other m 2020-10-15T00:56:29.41
IV.TERO.HHN. ML:0.9 0.000035783034999999995 0.08 AML other m 2020-10-15T00:56:31.19
IV.TERO.HHE. ML:1.0 0.000047818665 0.06 AML other m 2020-10-15T00:56:31.24
IV.MNTT.EHE. ML:1.3 0.000105920875 1.64 AML other m 2020-10-15T00:56:32.16
IV.CSP1.EHE. ML:1.3 0.00006710783000000001 0.7 AML other m 2020-10-15T00:56:33.77
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download