Earthquake with magnitude of ML 1.1 on date 20-10-2020 and time 17:36:59 (Italy) in region 2 km NW Ascoli Piceno (AP)

A magnitude ML 1.1 earthquake occured in region: 2 km NW Ascoli Piceno (AP), on

  • 20-10-2020 15:36:59 (UTC)
  • 20-10-2020 17:36:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.87, 13.55 at 20 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

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 2 49407 49407
Venarotta AP 5 2066 51473
Roccafluvione AP 6 2010 53483
Folignano AP 8 9241 62724
Palmiano AP 9 196 62920
Castignano AP 10 2796 65716
Appignano del Tronto AP 10 1785 67501
Rotella AP 10 906 68407
Maltignano AP 12 2401 70808
Force AP 12 1354 72162
Montedinove AP 12 488 72650
Castel di Lama AP 13 8634 81284
Offida AP 14 5058 86342
Civitella del Tronto TE 14 5116 91458
Sant'Egidio alla Vibrata TE 14 9811 101269
Montalto delle Marche AP 14 2122 103391
Castorano AP 15 2380 105771
Valle Castellana TE 15 977 106748
Comunanza AP 15 3166 109914
Montefalcone Appennino FM 16 424 110338
Ancarano TE 16 1857 112195
Acquasanta Terme AP 16 2916 115111
Colli del Tronto AP 16 3668 118779
Montelparo FM 17 778 119557
Cossignano AP 17 978 120535
Smerillo FM 18 365 120900
Santa Vittoria in Matenano FM 18 1330 122230
Spinetoli AP 18 7215 129445
Monte Rinaldo FM 18 379 129824
Montegallo AP 18 523 130347
Torano Nuovo TE 19 1611 131958
Montemonaco AP 19 604 132562
Campli TE 19 7209 139771
Ortezzano FM 19 774 140545
Montefortino FM 19 1178 141723
Monsampolo del Tronto AP 20 4611 146334

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Teramo (54892 inhabitants)
59 Km N of L'Aquila (69753 inhabitants)
63 Km NW of Montesilvano (53738 inhabitants)
70 Km E of Foligno (57155 inhabitants)
70 Km NW of Pescara (121014 inhabitants)
76 Km NW of Chieti (51815 inhabitants)
82 Km E of Terni (111501 inhabitants)
84 Km S of Ancona (100861 inhabitants)
99 Km E of Perugia (166134 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2020-10-20
15:36:59
42.87 13.55 20 2020-10-20
16:20:57
Sala Sismica INGV-Roma 83960361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-20 15:36:59 ± 0.19
Latitude 42.87 ± 0.01
Longitude 13.55 ± 0.01
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83960361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 771
Semi-minor axis of confidence ellipse (meter) 752
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 238
Circular confidence region, given by single value of horizontal uncertainty (meter) 770
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 202
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.13939
Epicentral distance of station farthest from the epicenter (degree) 0.33994
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 83960361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-20 16:20:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-10-20T15:37:13.15 0.3 undecidable manual S 311 0.3399 109 0.19 69
IV.NRCA.HHZ. 2020-10-20T15:37:12.49 0.3 undecidable manual S 264 0.3238 110 -0.02 72
IV.MC2.EHZ. 2020-10-20T15:37:11.23 0.3 undecidable manual S 280 0.2716 115 0.17 72
IV.SMA1.EHZ. 2020-10-20T15:37:11.44 0.3 undecidable manual S 214 0.286 114 -0.01 72
IV.TERO.HHZ. 2020-10-20T15:37:10.61 0.3 undecidable manual S 172 0.2464 118 0.2 72
IV.MF5.EHZ. 2020-10-20T15:37:08.05 0.3 undecidable manual S 330 0.1394 137 0.19 72
IV.NRCA.HHZ. 2020-10-20T15:37:07.20 0.1 undecidable manual P 264 0.3238 110 -0.02 97
IV.CSP1.EHZ. 2020-10-20T15:37:07.55 0.1 undecidable manual P 311 0.3399 109 0.08 95
IV.MTRA.EHZ. 2020-10-20T15:37:07.98 0.3 undecidable manual S 226 0.1601 132 -0.31 70
IV.TERO.HHZ. 2020-10-20T15:37:06.22 0.1 undecidable manual P 172 0.2464 118 0.21 95
IV.SMA1.EHZ. 2020-10-20T15:37:06.67 0.1 undecidable manual P 214 0.286 114 0.06 97
IV.MC2.EHZ. 2020-10-20T15:37:05.99 0.3 undecidable manual P 280 0.2716 115 -0.39 68
IV.MTRA.EHZ. 2020-10-20T15:37:04.77 0.1 positive manual P 226 0.1601 132 -0.01 100
IV.MF5.EHZ. 2020-10-20T15:37:04.27 0.1 undecidable manual P 330 0.1394 137 -0.26 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.2 9.0058805E-5 0.0768 AML other m 2020-10-20T15:37:08.30
IV.MTRA.EHN. ML:0.9 4.355367E-5 0.0512 AML other m 2020-10-20T15:37:08.27
IV.MTRA.HNE. ML:1.2 0.000100259955 0.0768 AML other m 2020-10-20T15:37:08.29
IV.MTRA.HNN. ML:0.9 4.976188E-5 0.064 AML other m 2020-10-20T15:37:08.24
IV.TERO.HHE. ML:1 3.9347905E-5 0.0768 AML other m 2020-10-20T15:37:10.78
IV.TERO.HHN. ML:1.1 5.034661E-5 0.0512 AML other m 2020-10-20T15:37:10.87
IV.TERO.HNE. ML:1.1 4.8475155E-5 0.0384 AML other m 2020-10-20T15:37:10.96
IV.TERO.HNN. ML:1.1 5.7012055E-5 0.064 AML other m 2020-10-20T15:37:10.90
IV.SMA1.EHE. ML:0.8 2.4685265E-5 0.1792 AML other m 2020-10-20T15:37:12.48
IV.SMA1.EHN. ML:0.7 2.189696E-5 0.1408 AML other m 2020-10-20T15:37:11.91
IV.NRCA.HNE. ML:1.3 7.7352255E-5 0.0768 AML other m 2020-10-20T15:37:13.07
IV.NRCA.HNN. ML:1.3 7.6229035E-5 0.0896 AML other m 2020-10-20T15:37:12.92
IV.NRCA.HHE. ML:1.4 7.8873205E-5 0.0896 AML other m 2020-10-20T15:37:13.06
IV.NRCA.HHN. ML:1.4 8.798602E-5 0.1152 AML other m 2020-10-20T15:37:12.91
IV.CSP1.EHE. ML:0.7 1.484661E-5 0.0896 AML other m 2020-10-20T15:37:13.45
IV.CSP1.EHN. ML:0.9 2.5600665E-5 0.1792 AML other m 2020-10-20T15:37:14.22
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download