Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 15-09-2020 and time 15:09:46 (UTC) in region 3 km NW Ascoli Piceno (AP)

A magnitude ML 1.6 earthquake occured in region: 3 km NW Ascoli Piceno (AP), on

  • 15-09-2020 15:09:46 (UTC)
  • 15-09-2020 17:09:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8750, 13.5490 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
Ascoli Piceno AP 3 49407 49407
Venarotta AP 5 2066 51473
Roccafluvione AP 6 2010 53483
Palmiano AP 8 196 53679
Rotella AP 9 906 54585
Folignano AP 9 9241 63826
Castignano AP 9 2796 66622
Appignano del Tronto AP 10 1785 68407
Force AP 11 1354 69761
Montedinove AP 11 488 70249
Maltignano AP 12 2401 72650
Castel di Lama AP 14 8634 81284
Montalto delle Marche AP 14 2122 83406
Offida AP 14 5058 88464
Comunanza AP 14 3166 91630
Montefalcone Appennino FM 15 424 92054
Sant'Egidio alla Vibrata TE 15 9811 101865
Civitella del Tronto TE 15 5116 106981
Castorano AP 15 2380 109361
Valle Castellana TE 16 977 110338
Montelparo FM 16 778 111116
Acquasanta Terme AP 16 2916 114032
Colli del Tronto AP 16 3668 117700
Ancarano TE 16 1857 119557
Cossignano AP 17 978 120535
Smerillo FM 17 365 120900
Santa Vittoria in Matenano FM 17 1330 122230
Monte Rinaldo FM 17 379 122609
Montegallo AP 18 523 123132
Montemonaco AP 18 604 123736
Ortezzano FM 18 774 124510
Montefortino FM 19 1178 125688
Spinetoli AP 19 7215 132903
Monteleone di Fermo FM 19 395 133298
Torano Nuovo TE 20 1611 134909
Amandola FM 20 3629 138538
Monte San Martino MC 20 765 139303
Campli TE 20 7209 146512

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Teramo (54892 inhabitants)
59 Km N of L'Aquila (69753 inhabitants)
63 Km NW of Montesilvano (53738 inhabitants)
69 Km E of Foligno (57155 inhabitants)
71 Km NW of Pescara (121014 inhabitants)
77 Km NW of Chieti (51815 inhabitants)
81 Km E of Terni (111501 inhabitants)
83 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 1.6 2020-09-15
15:09:46		 42.8747 13.5488 18 2021-02-26
14:55:58		 Bollettino Sismico Italiano INGV 83646731
Reviewed
Rev100 		ML 1.6 2020-09-15
15:09:47		 42.8713 13.5342 18 2020-09-15
15:17:50		 Sala Sismica INGV-Roma 82930971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-15 15:09:46 ± 0.06
Latitude 42.8747 ± 0.0027
Longitude 13.5488 ± 0.0049
Depth (km) 18 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83646731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 366
Semi-minor axis of confidence ellipse (meter) 97
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.11691
Epicentral distance of station farthest from the epicenter (degree) 0.51351
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 82930971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-15 15:17:50

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 83646731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-09 13:19:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2020-09-15T15:10:05.06 0.6 undecidable manual S 249 56.9985 99 0.24 45
IV.RM33.EHZ. 2020-09-15T15:10:02.93 0.3 undecidable manual S 214 48.9177 101 0.25 68
IV.GIGS.HHN. 2020-09-15T15:10:02.09 0.6 undecidable manual S 178 46.8198 102 -0.05 47
IV.PF6.EHN. 2020-09-15T15:10:00.80 0.6 undecidable manual S 316 41.0256 104 0.17 47
IV.FDMO.HHZ. 2020-09-15T15:10:00.72 0.6 undecidable manual S 296 41.5251 104 -0.05 47
IV.CAMP.HHE. 2020-09-15T15:10:00.46 0.6 undecidable manual S 197 39.2274 105 0.28 46
IV.NRCA.HHZ. 2020-09-15T15:09:59.42 0.3 undecidable manual S 263 35.6421 107 0.17 71
IV.T1299.HNN. 2020-09-15T15:09:59.21 0.6 undecidable manual S 219 34.4433 108 0.28 46
IV.SMA1.EHZ. 2020-09-15T15:09:58.24 0.3 undecidable manual S 213 32.1456 109 -0.13 71
IV.TERO.HHZ. 2020-09-15T15:09:57.67 0.6 undecidable manual S 171 28.2495 113 0.27 46
IV.GAVE.EHZ. 2020-09-15T15:09:57.24 0.3 undecidable manual P 249 56.9985 99 -0.05 69
IV.MC2.EHZ. 2020-09-15T15:09:57.77 0.3 undecidable manual S 278 29.5482 111 0.06 73
IV.SAP2.EHZ. 2020-09-15T15:09:57.39 0.6 undecidable manual S 334 27.4503 114 0.19 47
IV.RM33.EHZ. 2020-09-15T15:09:56.12 0.1 undecidable manual P 214 48.9177 101 0.07 94
IV.GIGS.HHN. 2020-09-15T15:09:55.36 0.1 undecidable manual P 178 46.8198 102 -0.37 88
IV.PF6.EHN. 2020-09-15T15:09:55.02 0.1 undecidable manual P 316 41.0256 104 0.16 93
IV.MTRA.HNZ. 2020-09-15T15:09:54.84 0.3 undecidable manual S 224 18.0708 127 -0.17 73
IV.MF5.EHZ. 2020-09-15T15:09:54.15 0.6 undecidable manual S 330 14.4744 135 -0.15 49
IV.FDMO.HHZ. 2020-09-15T15:09:54.77 0.1 undecidable manual P 296 41.5251 104 -0.18 93
IV.MMO1.EHZ. 2020-09-15T15:09:54.86 0.3 undecidable manual S 279 18.2706 127 -0.2 72
IV.CAMP.HHE. 2020-09-15T15:09:54.36 0.1 undecidable manual P 197 39.2274 105 -0.25 92
IV.T1299.HNN. 2020-09-15T15:09:53.95 0.3 undecidable manual P 219 34.4433 108 0.06 72
IV.TERO.HHZ. 2020-09-15T15:09:53.05 0.1 undecidable manual P 171 28.2495 113 0.05 97
IV.NRCA.HHZ. 2020-09-15T15:09:53.89 0.1 undecidable manual P 263 35.6421 107 -0.18 94
IV.GUMA.HHZ. 2020-09-15T15:09:53.13 0.6 undecidable manual P 320 27.1506 114 0.29 46
IV.MC2.EHZ. 2020-09-15T15:09:53.19 0.1 undecidable manual P 278 29.5482 111 0.01 98
IV.SMA1.EHZ. 2020-09-15T15:09:53.55 0.1 positive manual P 213 32.1456 109 -0.01 98
IV.MNTT.EHZ. 2020-09-15T15:09:52.07 0.1 undecidable manual P 10 21.1677 122 0.05 98
IV.SAP2.EHZ. 2020-09-15T15:09:52.59 0.1 undecidable manual P 334 27.4503 114 -0.29 93
IV.MF5.EHZ. 2020-09-15T15:09:51.28 0.3 undecidable manual P 330 14.4744 135 0.07 74
IV.MMO1.EHZ. 2020-09-15T15:09:51.62 0.1 undecidable manual P 279 18.2706 127 -0.03 100
IV.MTRA.HNZ. 2020-09-15T15:09:51.60 0.1 undecidable manual P 224 18.0708 127 -0.02 100
IV.OFFI.HHZ. 2020-09-15T15:09:51.45 0.6 undecidable manual P 59 12.9759 138 0.4 46
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:1.6 0.0002535 1.68 AML other m 2020-09-15T15:09:54.04
IV.MTRA.HNE. ML:2.1 0.000772 1.48 AML other m 2020-09-15T15:09:55.17
IV.MTRA.EHE. ML:2.0 0.0007465000000000001 1.5 AML other m 2020-09-15T15:09:55.17
IV.MTRA.EHN. ML:1.6 0.000261 0.42 AML other m 2020-09-15T15:09:55.04
IV.TERO.HHE. ML:1.4 0.0001155 1.42 AML other m 2020-09-15T15:09:58.85
IV.SMA1.EHE. ML:1.7 0.000193 0.44 AML other m 2020-09-15T15:09:58.70
IV.SMA1.EHN. ML:1.8 0.00024249999999999999 0.24 AML other m 2020-09-15T15:09:58.61
IV.NRCA.HHE. ML:1.7 0.0001815 0.94 AML other m 2020-09-15T15:09:59.07
IV.NRCA.HHN. ML:1.9 0.0002605 0.14 AML other m 2020-09-15T15:09:59.55
IV.TERO.HHN. ML:1.2 0.00007139999999999999 0.74 AML other m 2020-09-15T15:09:59.62
IV.FDMO.HHE. ML:1.3 0.00006470000000000001 1.48 AML other m 2020-09-15T15:10:01.18
IV.FDMO.HHN. ML:1.4 0.00007825 0.32 AML other m 2020-09-15T15:10:01.02
IV.RM33.EHN. ML:1.6 0.0000953 0.24 AML other m 2020-09-15T15:10:03.33
IV.RM33.EHE. ML:1.6 0.00010899999999999999 0.16 AML other m 2020-09-15T15:10:03.57
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