Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 23-10-2020 and time 20:13:05 (UTC) in region 3 km SE Venarotta (AP)

A magnitude ML 1.8 earthquake occured in region: 3 km SE Venarotta (AP), on

  • 23-10-2020 20:13:05 (UTC)
  • 23-10-2020 22:13:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8600, 13.5230 at 22 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
Venarotta AP 4 2066 2066
Roccafluvione AP 4 2010 4076
Ascoli Piceno AP 5 49407 53483
Palmiano AP 7 196 53679
Folignano AP 10 9241 62920
Rotella AP 11 906 63826
Force AP 12 1354 65180
Castignano AP 12 2796 67976
Appignano del Tronto AP 13 1785 69761
Montedinove AP 14 488 70249
Acquasanta Terme AP 14 2916 73165
Maltignano AP 14 2401 75566
Valle Castellana TE 14 977 76543
Comunanza AP 14 3166 79709
Civitella del Tronto TE 15 5116 84825
Montefalcone Appennino FM 15 424 85249
Montegallo AP 16 523 85772
Castel di Lama AP 16 8634 94406
Montalto delle Marche AP 16 2122 96528
Offida AP 16 5058 101586
Sant'Egidio alla Vibrata TE 16 9811 111397
Montemonaco AP 17 604 112001
Castorano AP 17 2380 114381
Smerillo FM 17 365 114746
Montefortino FM 17 1178 115924
Montelparo FM 18 778 116702
Santa Vittoria in Matenano FM 18 1330 118032
Ancarano TE 18 1857 119889
Colli del Tronto AP 19 3668 123557
Rocca Santa Maria TE 19 537 124094
Amandola FM 19 3629 127723
Cossignano AP 19 978 128701
Monte Rinaldo FM 20 379 129080
Campli TE 20 7209 136289

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)
68 Km E of Foligno (57155 inhabitants)
72 Km NW of Pescara (121014 inhabitants)
77 Km NW of Chieti (51815 inhabitants)
79 Km E of Terni (111501 inhabitants)
84 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 1.8 2020-10-23
20:13:05		 42.8597 13.5232 22 2021-02-26
14:56:01		 Bollettino Sismico Italiano INGV 84155401
Reviewed
Rev100 		ML 1.8 2020-10-23
20:13:05		 42.8532 13.5113 20 2020-10-23
20:22:27		 Sala Sismica INGV-Roma 84069591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-23 20:13:05 ± 0.12
Latitude 42.8597 ± 0.0036
Longitude 13.5232 ± 0.0061
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84155401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 504
Semi-minor axis of confidence ellipse (meter) 206
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 267
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 53
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51981
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 84155401
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-26 13:19:35

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 84069591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-23 20:22:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAPR.HNZ. 2020-10-23T20:14:51.83 3.0 undecidable manual Sn 1.66 0
IV.NDIM.HHZ. 2020-10-23T20:14:30.49 3.0 undecidable manual Sg 5.06 0
IV.PLLN.EHZ. 2020-10-23T20:14:29.74 3.0 negative manual Pg 10.03 0
GU.CANO.HHZ. 2020-10-23T20:14:21.25 3.0 undecidable manual Pg 12.88 0
XK.GIZZ.HHZ. 2020-10-23T20:14:19.42 3.0 undecidable manual Pg 6.79 0
IV.FIR.HHZ. 2020-10-23T20:14:09.95 3.0 undecidable manual Sg 5.93 0
IV.PAOL.HHZ. 2020-10-23T20:14:07.27 3.0 undecidable manual Sg 0.58 0
CR.ZAG.BHZ. 2020-10-23T20:13:58.06 3.0 undecidable manual Pn -1.31 0
IV.MNTV.HNZ. 2020-10-23T20:13:56.35 3.0 positive manual Pn 2.63 0
IV.PTRJ.HHZ. 2020-10-23T20:13:56.08 3.0 undecidable manual Sn -2.88 0
IV.FIR.HHZ. 2020-10-23T20:13:41.57 3.0 undecidable manual Pg 3.23 0
IV.MTRZ.HHZ. 2020-10-23T20:13:41.16 3.0 undecidable manual Pn -0.03 0
IV.LNSS.HHZ. 2020-10-23T20:13:22.04 0.3 undecidable manual S 234 48.618 107 0.68 60
IV.MMUR.HNZ. 2020-10-23T20:13:21.55 3.0 negative manual P 1.68 0
IV.RM33.EHZ. 2020-10-23T20:13:21.24 0.3 undecidable manual S 213 46.3203 108 0.46 66
IV.GIGS.HHZ. 2020-10-23T20:13:20.17 0.6 undecidable manual S 175 45.2214 108 -0.34 45
IV.FDMO.HHZ. 2020-10-23T20:13:19.51 0.6 undecidable manual S 299 40.4262 111 0.2 47
IV.PF6.EHZ. 2020-10-23T20:13:19.31 0.6 undecidable manual S 319 40.8258 110 -0.08 47
IV.T0110.HHZ. 2020-10-23T20:13:18.24 3.0 negative manual P -0.27 0
IV.CSP1.EHZ. 2020-10-23T20:13:18.36 0.6 undecidable manual S 315 36.4413 113 0.04 49
IV.T1299.EHZ. 2020-10-23T20:13:17.52 0.3 undecidable manual S 218 31.746 117 0.34 69
IV.NRCA.HHZ. 2020-10-23T20:13:17.90 0.6 undecidable manual S 265 33.3444 116 0.33 46
IV.MC2.EHZ. 2020-10-23T20:13:16.59 0.6 undecidable manual S 282 27.75 121 0.35 46
IV.VCEL.EHZ. 2020-10-23T20:13:16.00 0.6 undecidable manual P 153 57.6978 104 -0.02 47
IV.SMA1.EHZ. 2020-10-23T20:13:16.76 0.6 undecidable manual S 211 29.6481 119 0.07 49
IV.SAP2.EHZ. 2020-10-23T20:13:16.71 0.3 undecidable manual S 339 28.1496 121 0.37 69
IV.GUMA.HHZ. 2020-10-23T20:13:16.37 0.6 undecidable manual S 326 27.2505 122 0.25 48
IV.EL6.EHZ. 2020-10-23T20:13:16.68 3.0 negative manual P -0.29 0
IV.MNTT.EHZ. 2020-10-23T20:13:15.69 0.3 undecidable manual S 15 23.2545 127 0.45 69
IV.TERO.HHZ. 2020-10-23T20:13:15.94 0.6 undecidable manual S 166 27.0507 122 -0.16 49
IV.RM33.EHZ. 2020-10-23T20:13:14.48 0.1 positive manual P 213 46.3203 108 0.15 94
IV.OFFI.HHZ. 2020-10-23T20:13:14.19 0.3 undecidable manual S 58 15.6732 140 0.42 69
IV.LNSS.HHZ. 2020-10-23T20:13:14.75 0.3 undecidable manual P 234 48.618 107 0.09 71
IV.PF6.EHZ. 2020-10-23T20:13:13.21 0.3 undecidable manual P 319 40.8258 110 -0.31 68
IV.MF5.EHZ. 2020-10-23T20:13:13.33 0.3 undecidable manual S 340 15.1737 141 -0.35 71
IV.GIGS.HHZ. 2020-10-23T20:13:13.75 0.1 undecidable manual P 175 45.2214 108 -0.42 88
IV.MTRA.EHZ. 2020-10-23T20:13:13.24 0.3 undecidable manual S 222 15.3735 140 -0.48 70
IV.FDMO.HHZ. 2020-10-23T20:13:13.35 0.3 undecidable manual P 299 40.4262 111 -0.12 71
IV.MMO1.EHZ. 2020-10-23T20:13:13.40 0.3 undecidable manual S 286 16.5723 138 -0.53 69
IV.NRCA.HHZ. 2020-10-23T20:13:12.44 0.1 undecidable manual P 265 33.3444 116 -0.03 98
IV.TRTR.HHZ. 2020-10-23T20:13:12.85 0.6 undecidable manual P 100 32.2455 117 0.54 44
IV.CSP1.EHZ. 2020-10-23T20:13:12.78 0.1 positive manual P 315 36.4413 113 -0.12 95
IV.CAMP.HHZ. 2020-10-23T20:13:12.76 0.3 undecidable manual P 195 37.1295 113 -0.23 70
IV.T1299.EHZ. 2020-10-23T20:13:12.34 0.1 undecidable manual P 218 31.746 117 0.1 97
IV.TERO.HHZ. 2020-10-23T20:13:11.44 0.1 undecidable manual P 166 27.0507 122 -0.18 96
IV.SAP2.EHZ. 2020-10-23T20:13:11.65 0.6 undecidable manual P 339 28.1496 121 -0.11 48
IV.GUMA.HHZ. 2020-10-23T20:13:11.61 0.3 positive manual P 326 27.2505 122 -0.02 74
IV.MC2.EHZ. 2020-10-23T20:13:11.73 0.3 undecidable manual P 282 27.75 121 0.02 75
IV.MNTT.EHZ. 2020-10-23T20:13:11.30 0.1 undecidable manual P 15 23.2545 127 0.17 97
IV.SMA1.EHZ. 2020-10-23T20:13:11.92 0.1 positive manual P 211 29.6481 119 -0.04 99
IV.MTRA.EHZ. 2020-10-23T20:13:10.03 0.1 positive manual P 222 15.3735 140 -0.21 98
IV.MMO1.EHZ. 2020-10-23T20:13:10.06 0.3 undecidable manual P 286 16.5723 138 -0.3 72
IV.OFFI.HHZ. 2020-10-23T20:13:10.35 0.1 undecidable manual P 58 15.6732 140 0.08 100
IV.MF5.EHZ. 2020-10-23T20:13:10.02 0.1 undecidable manual P 340 15.1737 141 -0.2 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUMA.HNN. ML:2.5 0.0014255 0.4 AML other m 2020-10-23T20:13:11.22
IV.MTRA.EHN. ML:1.7 0.0003165 0.5 AML other m 2020-10-23T20:13:13.57
IV.MF5.EHE. ML:1.5 0.000183 0.3 AML other m 2020-10-23T20:13:13.58
IV.MTRA.HNE. ML:2.0 0.000655 0.5 AML other m 2020-10-23T20:13:13.56
IV.MTRA.EHE. ML:2.0 0.0006165000000000001 0.5 AML other m 2020-10-23T20:13:13.56
IV.MF5.EHN. ML:1.8 0.0003505 0.3 AML other m 2020-10-23T20:13:13.61
IV.MTRA.HNN. ML:1.7 0.000324 0.34 AML other m 2020-10-23T20:13:13.47
IV.OFFI.HHE. ML:1.8 0.00038549999999999994 0.48 AML other m 2020-10-23T20:13:14.57
IV.OFFI.HHN. ML:1.8 0.00039 1.56 AML other m 2020-10-23T20:13:15.85
IV.TERO.HNN. ML:1.8 0.0002575 1.68 AML other m 2020-10-23T20:13:15.13
IV.TERO.HHE. ML:1.8 0.00027600000000000004 0.18 AML other m 2020-10-23T20:13:16.09
IV.TERO.HNE. ML:2.0 0.000428 1.5 AML other m 2020-10-23T20:13:16.01
IV.MNTT.EHN. ML:2.1 0.000621 0.34 AML other m 2020-10-23T20:13:16.28
IV.GUMA.HHN. ML:1.7 0.0002325 0.48 AML other m 2020-10-23T20:13:16.47
IV.TERO.HHN. ML:1.7 0.00023150000000000002 1.22 AML other m 2020-10-23T20:13:16.12
IV.SMA1.EHN. ML:1.7 0.00022250000000000001 0.28 AML other m 2020-10-23T20:13:16.98
IV.SMA1.EHE. ML:1.6 0.000148 1.04 AML other m 2020-10-23T20:13:17.07
IV.GUMA.HNE. ML:1.6 0.0001855 0.2 AML other m 2020-10-23T20:13:17.89
IV.GUMA.HHE. ML:1.8 0.00027100000000000003 0.18 AML other m 2020-10-23T20:13:17.89
IV.MNTT.EHE. ML:2.0 0.000467 1.8 AML other m 2020-10-23T20:13:18.07
IV.NRCA.HHE. ML:1.9 0.0002915 0.18 AML other m 2020-10-23T20:13:18.09
IV.NRCA.HHN. ML:2.0 0.000358 0.1 AML other m 2020-10-23T20:13:18.17
IV.CSP1.EHN. ML:1.9 0.0002415 0.5 AML other m 2020-10-23T20:13:18.74
IV.CSP1.EHE. ML:1.8 0.00019700000000000002 0.2 AML other m 2020-10-23T20:13:18.71
IV.TRTR.HHN. ML:1.9 0.00029400000000000004 0.74 AML other m 2020-10-23T20:13:25.51
IV.TRTR.HHE. ML:1.9 0.0002755 1.6 AML other m 2020-10-23T20:13:26.13
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