Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 16-10-2020 and time 04:42:11 (Italy) in region 4 km W Ascoli Piceno (AP)

A magnitude ML 2.1 earthquake occured in region: 4 km W Ascoli Piceno (AP), on

  • 16-10-2020 02:42:11 (UTC)
  • 16-10-2020 04:42:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8600, 13.5320 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 4 49407 49407
Venarotta AP 4 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
Force AP 12 1354 69761
Maltignano AP 13 2401 72162
Montedinove AP 13 488 72650
Valle Castellana TE 14 977 73627
Acquasanta Terme AP 14 2916 76543
Comunanza AP 15 3166 79709
Civitella del Tronto TE 15 5116 84825
Castel di Lama AP 15 8634 93459
Sant'Egidio alla Vibrata TE 16 9811 103270
Montefalcone Appennino FM 16 424 103694
Offida AP 16 5058 108752
Montalto delle Marche AP 16 2122 110874
Montegallo AP 16 523 111397
Castorano AP 17 2380 113777
Montemonaco AP 17 604 114381
Ancarano TE 17 1857 116238
Montelparo FM 18 778 117016
Smerillo FM 18 365 117381
Colli del Tronto AP 18 3668 121049
Montefortino FM 18 1178 122227
Santa Vittoria in Matenano FM 18 1330 123557
Cossignano AP 19 978 124535
Rocca Santa Maria TE 19 537 125072
Monte Rinaldo FM 19 379 125451
Campli TE 19 7209 132660
Amandola FM 20 3629 136289

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Teramo (54892 inhabitants)
58 Km N of L'Aquila (69753 inhabitants)
63 Km NW of Montesilvano (53738 inhabitants)
68 Km E of Foligno (57155 inhabitants)
71 Km NW of Pescara (121014 inhabitants)
77 Km NW of Chieti (51815 inhabitants)
80 Km E of Terni (111501 inhabitants)
84 Km S of Ancona (100861 inhabitants)
97 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 2.1 2020-10-16
02:42:11		 42.8597 13.5325 20 2021-02-26
14:56:00		 Bollettino Sismico Italiano INGV 84052421
Reviewed
Rev100 		ML 2.1 2020-10-16
02:42:11		 42.8558 13.5383 18 2020-10-16
02:48:57		 Sala Sismica INGV-Roma 83815261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-16 02:42:11 ± 0.09
Latitude 42.8597 ± 0.0027
Longitude 13.5325 ± 0.0049
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 84052421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 442
Semi-minor axis of confidence ellipse (meter) 158
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 55
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.76982
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 84052421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-25 01:05:13

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 34
Type of magnitude ML
Reference to an origin 83815261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-16 02:48:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCIV.CHZ. 2020-10-16T02:42:55.96 3.0 undecidable manual Sn 0.93 0
IV.RINC.HHZ. 2020-10-16T02:42:42.24 3.0 undecidable manual Pn 0.98 0
IV.PTRJ.HNZ. 2020-10-16T02:42:39.80 3.0 undecidable manual Pn -0.6 0
IV.ARVD.HHZ. 2020-10-16T02:42:37.33 0.3 undecidable manual S 326 85.4478 97 0.21 65
IV.FOSV.EHZ. 2020-10-16T02:42:35.58 0.3 undecidable manual S 308 78.9654 98 0.17 66
IV.T0110.HHZ. 2020-10-16T02:42:34.06 0.1 undecidable manual S 164 72.6717 99 0.31 86
IV.ASSB.HHZ. 2020-10-16T02:42:34.62 0.1 undecidable manual S 286 73.7706 98 0.58 81
IV.LATB.EHZ. 2020-10-16T02:42:34.70 3.0 positive manual Pn -2.29 0
IV.SNTG.HHZ. 2020-10-16T02:42:32.22 0.3 undecidable manual S 313 64.9905 100 0.5 85
IV.VCEL.EHN. 2020-10-16T02:42:30.31 0.3 undecidable manual S 154 57.3981 101 0.58 62
IV.CESI.HHZ. 2020-10-16T02:42:29.10 0.1 undecidable manual S 288 53.502 102 0.4 88
IV.GAVE.EHZ. 2020-10-16T02:42:29.42 0.1 undecidable manual S 251 55.2003 102 0.27 91
IV.LNSS.HHZ. 2020-10-16T02:42:28.10 0.1 undecidable manual S 235 49.2174 104 0.51 87
IV.RM33.EHZ. 2020-10-16T02:42:27.34 0.1 undecidable manual S 214 46.7199 105 0.38 90
IV.GIGS.HHE. 2020-10-16T02:42:26.21 0.1 undecidable manual S 176 45.2214 105 -0.35 91
IV.ARVD.HHZ. 2020-10-16T02:42:26.38 0.1 undecidable manual P 326 85.4478 97 0 90
IV.PF6.EHN. 2020-10-16T02:42:25.55 0.1 undecidable manual S 318 41.3253 107 -0.01 98
IV.FOSV.EHZ. 2020-10-16T02:42:25.43 0.3 undecidable manual P 308 78.9654 98 0.04 68
IV.TRTR.HHE. 2020-10-16T02:42:25.00 0.6 undecidable manual S 100 31.5462 114 1.89 21
IV.FDMO.HHZ. 2020-10-16T02:42:25.39 0.1 undecidable manual S 299 41.1255 107 -0.12 95
IV.CSP1.EHZ. 2020-10-16T02:42:24.45 0.1 undecidable manual S 314 37.0296 110 -0.02 98
IV.T0110.HHZ. 2020-10-16T02:42:24.18 0.1 negative manual P 164 72.6717 99 -0.25 88
IV.ASSB.HHZ. 2020-10-16T02:42:24.71 0.1 undecidable manual P 286 73.7706 98 0.11 90
IV.T1299.HNN. 2020-10-16T02:42:23.58 0.1 undecidable manual S 219 32.2455 113 0.29 94
IV.NRCA.HHZ. 2020-10-16T02:42:23.76 0.1 undecidable manual S 265 34.1436 112 0.01 99
IV.FAGN.HHZ. 2020-10-16T02:42:23.33 0.1 undecidable manual P 176 65.9895 100 -0.09 92
IV.SMA1.EHZ. 2020-10-16T02:42:22.78 0.3 undecidable manual S 212 30.0477 115 0.03 99
IV.MC2.EHZ. 2020-10-16T02:42:22.51 0.1 undecidable manual S 282 28.5492 117 0.13 97
IV.SNTG.HHZ. 2020-10-16T02:42:22.92 0.1 undecidable manual P 313 64.9905 100 -0.34 87
IV.SAP2.EHZ. 2020-10-16T02:42:22.70 0.1 undecidable manual S 338 28.4493 117 0.34 93
IV.EL6.EHZ. 2020-10-16T02:42:22.67 0.1 negative manual P 326 62.6928 100 -0.24 89
IV.GUMA.HHZ. 2020-10-16T02:42:22.34 0.1 undecidable manual S 325 27.6501 118 0.17 97
IV.VCEL.EHN. 2020-10-16T02:42:22.02 0.3 undecidable manual P 154 57.3981 101 -0.09 70
IV.TERO.HHZ. 2020-10-16T02:42:21.94 0.1 undecidable manual S 167 26.9508 118 -0.06 100
IV.CESI.HHZ. 2020-10-16T02:42:21.37 0.1 negative manual P 288 53.502 102 -0.15 93
IV.GAVE.EHZ. 2020-10-16T02:42:21.84 0.1 undecidable manual P 251 55.2003 102 0.06 95
IV.MNTT.EHZ. 2020-10-16T02:42:21.36 0.1 undecidable manual S 13 23.0547 123 0.25 95
IV.RM33.EHZ. 2020-10-16T02:42:20.49 0.1 negative manual P 214 46.7199 105 -0.02 96
IV.LNSS.HHZ. 2020-10-16T02:42:20.79 0.1 undecidable manual P 235 49.2174 104 -0.09 95
IV.MF5.EHN. 2020-10-16T02:42:19.36 0.1 undecidable manual S 337 15.3735 137 -0.18 99
IV.MTRA.HNZ. 2020-10-16T02:42:19.21 0.1 undecidable manual S 224 15.873 136 -0.43 94
IV.PF6.EHN. 2020-10-16T02:42:19.27 0.1 undecidable manual P 318 41.3253 107 -0.43 89
IV.MMO1.EHZ. 2020-10-16T02:42:19.46 0.1 undecidable manual S 285 17.2716 133 -0.44 93
IV.FDMO.HHZ. 2020-10-16T02:42:19.37 0.1 undecidable manual P 299 41.1255 107 -0.31 92
IV.GIGS.HHE. 2020-10-16T02:42:19.81 0.1 negative manual P 176 45.2214 105 -0.47 88
IV.NRCA.HHZ. 2020-10-16T02:42:18.45 0.1 negative manual P 265 34.1436 112 -0.21 95
IV.CSP1.EHZ. 2020-10-16T02:42:18.80 0.1 positive manual P 314 37.0296 110 -0.28 93
IV.TRTR.HHE. 2020-10-16T02:42:18.95 0.3 undecidable manual P 100 31.5462 114 0.66 63
IV.T1299.HNN. 2020-10-16T02:42:18.35 0.1 positive manual P 219 32.2455 113 -0.04 99
IV.MNTT.EHZ. 2020-10-16T02:42:17.36 0.1 positive manual P 13 23.0547 123 0.22 96
IV.GUMA.HHZ. 2020-10-16T02:42:17.62 0.1 positive manual P 325 27.6501 118 -0.13 98
IV.TERO.HHZ. 2020-10-16T02:42:17.40 0.1 positive manual P 167 26.9508 118 -0.25 96
IV.SMA1.EHZ. 2020-10-16T02:42:17.92 0.1 positive manual P 212 30.0477 115 -0.17 97
IV.MC2.EHZ. 2020-10-16T02:42:17.75 0.1 undecidable manual P 282 28.5492 117 -0.12 98
IV.SAP2.EHZ. 2020-10-16T02:42:17.86 0.1 negative manual P 338 28.4493 117 0 100
IV.MF5.EHN. 2020-10-16T02:42:16.04 0.1 positive manual P 337 15.3735 137 -0.19 99
IV.OFFI.HHE. 2020-10-16T02:42:16.35 0.1 negative manual P 56 14.9739 138 0.16 99
IV.MTRA.HNZ. 2020-10-16T02:42:16.02 0.1 positive manual P 224 15.873 136 -0.27 97
IV.MMO1.EHZ. 2020-10-16T02:42:16.06 0.1 undecidable manual P 285 17.2716 133 -0.38 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNE. ML:2.5 0.002005 0.5 AML other m 2020-10-16T02:42:19.55
IV.MTRA.EHE. ML:2.5 0.002045 0.48 AML other m 2020-10-16T02:42:19.55
IV.MTRA.HNN. ML:2.1 0.0008814999999999999 0.22 AML other m 2020-10-16T02:42:19.52
IV.MTRA.EHN. ML:2.1 0.000865 0.24 AML other m 2020-10-16T02:42:19.52
IV.TERO.HHN. ML:1.8 0.000281076 0.16 AML other m 2020-10-16T02:42:22.09
IV.TERO.HHE. ML:2.1 0.0005785 0.18 AML other m 2020-10-16T02:42:22.04
IV.MNTT.EHE. ML:2.2 0.00077695055 0.2 AML other m 2020-10-16T02:42:22.15
IV.MNTT.EHN. ML:2.4 0.001355 0.36 AML other m 2020-10-16T02:42:22.30
IV.TERO.HNE. ML:2.2 0.0007090000000000001 0.54 AML other m 2020-10-16T02:42:22.09
IV.GUMA.HNE. ML:2.0 0.00040239180000000005 0.1792 AML other m 2020-10-16T02:42:22.51
IV.GUMA.HHN. ML:2.1 0.0005520000000000001 0.2 AML other m 2020-10-16T02:42:22.50
IV.TERO.HNN. ML:2.0 0.000481 1.26 AML other m 2020-10-16T02:42:22.09
IV.SAP2.EHE. ML:1.7 0.000230333405 0.4816 AML other m 2020-10-16T02:42:23.04
IV.SMA1.EHN. ML:2.2 0.0006386527 0.6592 AML other m 2020-10-16T02:42:23.16
IV.SAP2.EHN. ML:2.4 0.0011527495000000002 0.28 AML other m 2020-10-16T02:42:22.77
IV.GUMA.HHE. ML:1.9 0.00038348185 0.5808 AML other m 2020-10-16T02:42:22.98
IV.SMA1.EHE. ML:2.0 0.00044486229999999996 0.4592 AML other m 2020-10-16T02:42:23.07
IV.NRCA.HNE. ML:2.3 0.0007850279499999999 0.08 AML other m 2020-10-16T02:42:24.11
IV.NRCA.HHE. ML:2.3 0.00078095095 0.08 AML other m 2020-10-16T02:42:24.11
IV.NRCA.HHN. ML:2.5 0.0011149999999999999 0.08 AML other m 2020-10-16T02:42:24.22
IV.NRCA.HNN. ML:2.4 0.001009347 0.08 AML other m 2020-10-16T02:42:24.19
IV.CSP1.EHN. ML:2.3 0.0007 0.3 AML other m 2020-10-16T02:42:24.60
IV.CSP1.EHE. ML:2.2 0.0006035 0.42 AML other m 2020-10-16T02:42:24.85
IV.FDMO.HHN. ML:1.9 0.00021900000000000004 0.12 AML other m 2020-10-16T02:42:25.65
IV.FDMO.HHE. ML:1.8 0.0001995 0.54 AML other m 2020-10-16T02:42:25.82
IV.RM33.EHN. ML:1.9 0.000188 0.24 AML other m 2020-10-16T02:42:27.59
IV.RM33.EHE. ML:1.8 0.00016565385 0.1408 AML other m 2020-10-16T02:42:27.93
IV.LNSS.HHE. ML:1.8 0.00014480304999999998 0.1392 AML other m 2020-10-16T02:42:28.29
IV.LNSS.HNN. ML:2.1 0.00031288189999999997 0.76 AML other m 2020-10-16T02:42:28.68
IV.LNSS.HHN. ML:2.0 0.00026112069999999996 0.7584 AML other m 2020-10-16T02:42:28.30
IV.CESI.HHN. ML:1.8 0.0001414301 0.9008 AML other m 2020-10-16T02:42:29.28
IV.CESI.HHE. ML:1.8 0.00014160315000000002 0.4 AML other m 2020-10-16T02:42:29.28
IV.GAVE.EHN. ML:1.6 0.00009632623 0.2608 AML other m 2020-10-16T02:42:29.96
IV.GAVE.EHE. ML:1.7 0.00011628311999999999 0.6 AML other m 2020-10-16T02:42:29.00
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
Waveforms Seismic signals in miniseed + resp format Download