Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 20-10-2020 and time 09:10:51 (Italy) in region 3 km W Ascoli Piceno (AP)

A magnitude ML 1.8 earthquake occured in region: 3 km W Ascoli Piceno (AP), on

  • 20-10-2020 07:10:51 (UTC)
  • 20-10-2020 09:10:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8560, 13.5380 at 20 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
Ascoli Piceno AP 3 49407 49407
Venarotta AP 5 2066 51473
Roccafluvione AP 5 2010 53483
Palmiano AP 8 196 53679
Folignano AP 9 9241 62920
Rotella AP 11 906 63826
Castignano AP 12 2796 66622
Appignano del Tronto AP 12 1785 68407
Maltignano AP 13 2401 70808
Force AP 13 1354 72162
Montedinove AP 14 488 72650
Valle Castellana TE 14 977 73627
Civitella del Tronto TE 14 5116 78743
Acquasanta Terme AP 14 2916 81659
Castel di Lama AP 14 8634 90293
Sant'Egidio alla Vibrata TE 15 9811 100104
Comunanza AP 15 3166 103270
Offida AP 16 5058 108328
Montalto delle Marche AP 16 2122 110450
Montefalcone Appennino FM 16 424 110874
Castorano AP 16 2380 113254
Montegallo AP 17 523 113777
Ancarano TE 17 1857 115634
Colli del Tronto AP 17 3668 119302
Montemonaco AP 18 604 119906
Montelparo FM 18 778 120684
Smerillo FM 18 365 121049
Santa Vittoria in Matenano FM 19 1330 122379
Montefortino FM 19 1178 123557
Campli TE 19 7209 130766
Rocca Santa Maria TE 19 537 131303
Cossignano AP 19 978 132281
Monte Rinaldo FM 20 379 132660
Spinetoli AP 20 7215 139875
Torano Nuovo TE 20 1611 141486

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Teramo (54892 inhabitants)
57 Km N of L'Aquila (69753 inhabitants)
63 Km NW of Montesilvano (53738 inhabitants)
69 Km E of Foligno (57155 inhabitants)
70 Km NW of Pescara (121014 inhabitants)
76 Km NW of Chieti (51815 inhabitants)
80 Km E of Terni (111501 inhabitants)
85 Km S of Ancona (100861 inhabitants)
98 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 1.8 2020-10-20
07:10:51		 42.8558 13.5377 20 2021-02-26
14:56:07		 Bollettino Sismico Italiano INGV 84979931
Reviewed
Rev100 		ML 1.9 2020-10-20
07:10:51		 42.8567 13.538 19 2020-10-20
07:16:38		 Sala Sismica INGV-Roma 83945611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-20 07:10:51 ± 0.07
Latitude 42.8558 ± 0.0018
Longitude 13.5377 ± 0.0037
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84979931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 329
Semi-minor axis of confidence ellipse (meter) 46
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 48
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.13400
Epicentral distance of station farthest from the epicenter (degree) 0.71136
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 39
Type of magnitude ML
Reference to an origin 84979931
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-24 09:41:08

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 83945611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-20 07:16:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2020-10-20T07:11:15.22 0.6 undecidable manual S 266 78.9654 97 -0.21 44
IV.T0110.HHZ. 2020-10-20T07:11:13.67 0.6 undecidable manual S 164 72.1722 98 0.03 46
IV.EL6.EHZ. 2020-10-20T07:11:11.70 0.6 undecidable manual S 326 63.2922 99 0.4 43
IV.GAVE.EHZ. 2020-10-20T07:11:09.61 0.6 undecidable manual S 251 55.4001 101 0.37 44
IV.VCEL.EHZ. 2020-10-20T07:11:09.49 0.6 undecidable manual S 154 56.7987 101 -0.11 47
IV.LNSS.HHZ. 2020-10-20T07:11:08.07 0.3 undecidable manual S 235 49.3173 103 0.44 65
IV.CESI.HHZ. 2020-10-20T07:11:08.82 0.6 undecidable manual S 288 54.0015 101 -0.04 48
IV.RM33.EHZ. 2020-10-20T07:11:07.32 0.6 undecidable manual S 215 46.62 104 0.38 44
IV.GIGS.HHN. 2020-10-20T07:11:06.40 0.6 undecidable manual S 176 44.7219 105 -0.05 48
IV.FDMO.HHZ. 2020-10-20T07:11:05.57 0.3 undecidable manual S 299 41.7249 106 -0.1 72
IV.PF6.EHN. 2020-10-20T07:11:05.55 0.3 undecidable manual S 318 41.9247 106 -0.17 71
IV.MOMA.HHZ. 2020-10-20T07:11:05.66 0.6 undecidable manual P 266 78.9654 97 0.23 43
IV.CSP1.EHZ. 2020-10-20T07:11:04.61 0.3 undecidable manual S 314 37.629 108 -0.02 73
IV.T0110.HHZ. 2020-10-20T07:11:04.44 0.6 undecidable manual P 164 72.1722 98 0.05 46
IV.NRCA.HHZ. 2020-10-20T07:11:03.95 0.3 undecidable manual S 266 34.5432 110 0.1 73
IV.T1299.HNN. 2020-10-20T07:11:03.30 0.3 undecidable manual S 220 32.2455 112 0.04 74
IV.TERO.HHZ. 2020-10-20T07:11:02.03 0.3 undecidable manual S 168 26.4513 118 0.17 73
IV.EL6.EHZ. 2020-10-20T07:11:02.92 0.6 undecidable manual P 326 63.2922 99 -0.12 46
IV.GUMA.HHZ. 2020-10-20T07:11:02.56 0.6 undecidable manual S 324 28.2495 116 0.27 48
IV.SAP2.EHE. 2020-10-20T07:11:02.59 0.6 undecidable manual S 337 28.9488 115 0.11 49
IV.MC2.EHZ. 2020-10-20T07:11:02.77 0.3 undecidable manual S 282 29.0487 115 0.29 71
IV.GAVE.EHZ. 2020-10-20T07:11:02.00 0.3 undecidable manual P 251 55.4001 101 0.15 69
IV.SMA1.EHZ. 2020-10-20T07:11:02.94 0.3 undecidable manual S 213 29.9478 114 0.23 71
IV.VCEL.EHZ. 2020-10-20T07:11:02.17 0.6 undecidable manual P 154 56.7987 101 0.11 46
IV.CESI.HHZ. 2020-10-20T07:11:01.48 0.3 undecidable manual P 288 54.0015 101 -0.16 70
IV.MNTT.EHZ. 2020-10-20T07:11:01.33 0.3 undecidable manual S 12 23.3544 121 0.18 74
IV.LNSS.HHZ. 2020-10-20T07:11:00.94 0.3 undecidable manual P 235 49.3173 103 0.02 72
IV.RM33.EHZ. 2020-10-20T07:11:00.35 0.3 undecidable manual P 215 46.62 104 -0.17 71
IV.MTRA.HNZ. 2020-10-20T07:10:59.38 0.3 undecidable manual S 226 15.873 134 -0.19 74
IV.GIGS.HHN. 2020-10-20T07:10:59.84 0.3 undecidable manual P 176 44.7219 105 -0.41 67
IV.MF5.EHZ. 2020-10-20T07:10:59.46 0.3 undecidable manual S 337 15.9729 134 -0.12 74
IV.MMO1.EHZ. 2020-10-20T07:10:59.55 0.3 undecidable manual S 286 17.7711 130 -0.4 70
IV.FDMO.HHZ. 2020-10-20T07:10:59.53 0.3 undecidable manual P 299 41.7249 106 -0.26 70
IV.PF6.EHN. 2020-10-20T07:10:59.84 0.3 undecidable manual P 318 41.9247 106 0.02 73
IV.SMA1.EHZ. 2020-10-20T07:10:58.05 0.1 positive manual P 213 29.9478 114 -0.03 100
IV.NRCA.HHZ. 2020-10-20T07:10:58.58 0.1 undecidable manual P 266 34.5432 110 -0.16 96
IV.GUMA.HHZ. 2020-10-20T07:10:58.25 0.3 undecidable manual P 324 28.2495 116 0.41 69
IV.CSP1.EHZ. 2020-10-20T07:10:58.93 0.1 positive manual P 314 37.629 108 -0.26 93
IV.CAMP.HHZ. 2020-10-20T07:10:58.88 0.3 undecidable manual P 197 37.0296 108 -0.22 71
IV.T1299.HNN. 2020-10-20T07:10:58.39 0.6 undecidable manual P 220 32.2455 112 -0.01 50
IV.MNTT.EHZ. 2020-10-20T07:10:57.51 0.6 undecidable manual P 12 23.3544 121 0.33 48
IV.TERO.HHZ. 2020-10-20T07:10:57.57 0.3 undecidable manual P 168 26.4513 118 -0.02 75
IV.SAP2.EHE. 2020-10-20T07:10:57.82 0.3 undecidable manual P 337 28.9488 115 -0.13 73
IV.MC2.EHZ. 2020-10-20T07:10:57.89 0.1 undecidable manual P 282 29.0487 115 -0.06 99
IV.MTRA.HNZ. 2020-10-20T07:10:56.13 0.1 positive manual P 226 15.873 134 -0.14 100
IV.MF5.EHZ. 2020-10-20T07:10:56.19 0.1 positive manual P 337 15.9729 134 -0.09 100
IV.OFFI.HHZ. 2020-10-20T07:10:56.55 0.3 undecidable manual P 54 14.874 136 0.39 72
IV.MMO1.EHZ. 2020-10-20T07:10:56.35 0.3 undecidable manual P 286 17.7711 130 -0.14 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:2.1 0.00086159445 0.0832 AML other m 2020-10-20T07:10:59.68
IV.MTRA.HNE. ML:2.1 0.000863642 0.0832 AML other m 2020-10-20T07:10:59.68
IV.MTRA.HNN. ML:1.8 0.00045368604999999993 0.1504 AML other m 2020-10-20T07:10:59.69
IV.MTRA.EHN. ML:1.9 0.00047704539999999997 0.16 AML other m 2020-10-20T07:10:59.68
IV.MF5.EHN. ML:2.0 0.0007236945500000001 0.3008 AML other m 2020-10-20T07:10:59.75
IV.MF5.EHE. ML:1.8 0.0003641171 0.32 AML other m 2020-10-20T07:10:59.73
IV.MNTT.EHE. ML:2.2 0.0008004541000000001 0.1792 AML other m 2020-10-20T07:11:04.20
IV.MNTT.EHN. ML:2.3 0.0009808428499999999 0.32 AML other m 2020-10-20T07:11:02.25
IV.TERO.HHN. ML:1.7 0.00021984280000000002 0.0992 AML other m 2020-10-20T07:11:02.85
IV.TERO.HNN. ML:1.8 0.00028167320000000004 0.1504 AML other m 2020-10-20T07:11:02.30
IV.TERO.HHE. ML:1.9 0.0003964156 0.16 AML other m 2020-10-20T07:11:02.17
IV.TERO.HNE. ML:2.0 0.0004934115 0.1696 AML other m 2020-10-20T07:11:02.48
IV.SMA1.EHN. ML:1.8 0.00029630849999999996 0.2624 AML other m 2020-10-20T07:11:03.10
IV.SMA1.EHE. ML:1.7 0.00018753205 0.0992 AML other m 2020-10-20T07:11:03.72
IV.NRCA.HNN. ML:2.3 0.00076872055 0.08 AML other m 2020-10-20T07:11:04.30
IV.NRCA.HHE. ML:2.4 0.0008962036499999999 0.08 AML other m 2020-10-20T07:11:04.42
IV.NRCA.HNE. ML:2.3 0.0007897053499999999 0.0896 AML other m 2020-10-20T07:11:04.42
IV.NRCA.HHN. ML:2.3 0.0008045124999999999 0.0608 AML other m 2020-10-20T07:11:04.31
IV.CSP1.EHE. ML:2.1 0.0003839567 0.2208 AML other m 2020-10-20T07:11:04.96
IV.CSP1.EHN. ML:2.1 0.0004405385 0.16 AML other m 2020-10-20T07:11:04.72
IV.FDMO.HHE. ML:1.6 0.000102797195 0.1184 AML other m 2020-10-20T07:11:05.93
IV.FDMO.HHN. ML:1.6 0.000121853335 0.1184 AML other m 2020-10-20T07:11:05.77
IV.RM33.EHE. ML:1.6 0.00010110951000000002 0.2816 AML other m 2020-10-20T07:11:08.58
IV.RM33.EHN. ML:1.6 0.00009607053999999999 0.2176 AML other m 2020-10-20T07:11:07.72
IV.LNSS.HHE. ML:1.8 0.0001409573 0.1184 AML other m 2020-10-20T07:11:09.18
IV.LNSS.HHN. ML:2.0 0.0002350335 0.3392 AML other m 2020-10-20T07:11:12.76
IV.LNSS.HNE. ML:1.8 0.00015645664999999997 0.1792 AML other m 2020-10-20T07:11:09.75
IV.CESI.HHE. ML:1.5 0.00007272508 0.3776 AML other m 2020-10-20T07:11:09.40
IV.CESI.HHN. ML:1.5 0.00007579482500000001 0.1984 AML other m 2020-10-20T07:11:10.66
IV.GAVE.EHN. ML:1.9 0.0001666651 0.1792 AML other m 2020-10-20T07:11:10.92
IV.GAVE.HNE. ML:2.0 0.00019597735 0.9408 AML other m 2020-10-20T07:11:13.48
IV.GAVE.EHE. ML:1.8 0.0001483742 0.16 AML other m 2020-10-20T07:11:11.01
IV.VCEL.EHN. ML:1.5 0.000059815640000000007 0.3616 AML other m 2020-10-20T07:11:12.72
IV.EL6.EHN. ML:1.6 0.00006281149 0.2432 AML other m 2020-10-20T07:11:15.72
IV.EL6.EHE. ML:1.4 0.000052458370000000004 0.3808 AML other m 2020-10-20T07:11:18.94
IV.T0110.HHN. ML:1.4 0.000038864750000000004 0.3776 AML other m 2020-10-20T07:11:15.22
IV.MOMA.HHN. ML:1.3 0.000029669324999999996 0.32 AML other m 2020-10-20T07:11:17.36
IV.MOMA.HNE. ML:2.0 0.00012306305000000001 1.2192 AML other m 2020-10-20T07:11:19.33
IV.MOMA.HHE. ML:1.4 0.00003535245500000001 0.2016 AML other m 2020-10-20T07:11:18.72
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