Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 11-11-2020 and time 21:25:00 (Italy) in region Costa Marchigiana Picena (Ascoli Piceno)

A magnitude ML 1.7 earthquake occured in region: Costa Marchigiana Picena (Ascoli Piceno), on

  • 11-11-2020 20:25:00 (UTC)
  • 11-11-2020 21:25:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.98, 13.95 at 35 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Benedetto del Tronto AP 6 47303 47303
Grottammare AP 7 16006 63309
Cupra Marittima AP 9 5398 68707
Martinsicuro TE 10 16033 84740
Monteprandone AP 11 12655 97395
Acquaviva Picena AP 11 3831 101226
Colonnella TE 13 3734 104960
Massignano AP 15 1638 106598
Ripatransone AP 15 4309 110907
Monsampolo del Tronto AP 15 4611 115518
Alba Adriatica TE 16 12353 127871
Campofilone FM 16 1916 129787
Pedaso FM 16 2800 132587
Controguerra TE 17 2436 135023
Spinetoli AP 17 7215 142238
Montefiore dell'Aso AP 18 2123 144361
Corropoli TE 19 5045 149406
Tortoreto TE 19 11542 160948
Altidona FM 19 3390 164338
Colli del Tronto AP 19 3668 168006
Castorano AP 20 2380 170386
Nereto TE 20 5242 175628

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NE of Teramo (54892 inhabitants)
54 Km NW of Montesilvano (53738 inhabitants)
61 Km NW of Pescara (121014 inhabitants)
72 Km N of Chieti (51815 inhabitants)
79 Km SE of Ancona (100861 inhabitants)
83 Km NE of L'Aquila (69753 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 1.7 2020-11-11
20:25:00		 42.98 13.95 35 2020-11-11
20:40:42		 Sala Sismica INGV-Roma 84650071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-11 20:25:00 ± 0.32
Latitude 42.98 ± 0.01
Longitude 13.95 ± 0.02
Depth (km) 35 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84650071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1278
Semi-minor axis of confidence ellipse (meter) 1269
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 52
Circular confidence region, given by single value of horizontal uncertainty (meter) 1280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 287
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.16907
Epicentral distance of station farthest from the epicenter (degree) 0.63042
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 84650071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-11 20:40:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-11-11T20:25:23.16 0.6 undecidable manual S 276 0.6304 112 -0.17 49
IV.NRCA.HHZ. 2020-11-11T20:25:23.52 0.6 undecidable manual S 257 0.625 112 0.34 47
IV.CSP1.EHZ. 2020-11-11T20:25:21.15 0.6 undecidable manual S 282 0.554 115 -0.09 50
IV.TERO.HHZ. 2020-11-11T20:25:18.16 0.6 undecidable manual S 216 0.4326 121 0.09 52
IV.GUMA.HHZ. 2020-11-11T20:25:18.60 0.6 undecidable manual S 281 0.4551 120 -0.03 52
IV.MMO1.EHZ. 2020-11-11T20:25:17.90 0.6 undecidable manual S 261 0.4596 120 -0.85 40
IV.MF5.EHZ. 2020-11-11T20:25:16.08 0.6 undecidable manual S 272 0.3561 127 -0.11 52
IV.MNTT.EHZ. 2020-11-11T20:25:14.83 0.6 undecidable manual S 289 0.2707 136 0.55 48
IV.FDMO.HHZ. 2020-11-11T20:25:13.85 1.0 undecidable manual P 276 0.6304 112 -0.02 25
IV.NRCA.HHZ. 2020-11-11T20:25:13.40 0.3 undecidable manual P 257 0.625 112 -0.39 69
IV.SMA1.EHZ. 2020-11-11T20:25:13.31 0.6 undecidable manual P 233 0.5648 114 0.47 47
IV.CSP1.EHZ. 2020-11-11T20:25:12.59 0.6 negative manual P 282 0.554 115 -0.08 50
IV.OFFI.HHZ. 2020-11-11T20:25:12.79 0.6 undecidable manual S 258 0.1952 145 -0.06 54
IV.GUMA.HHZ. 2020-11-11T20:25:11.56 1.0 negative manual P 281 0.4551 120 0.4 24
IV.MMO1.EHZ. 2020-11-11T20:25:10.79 0.1 undecidable manual P 261 0.4596 120 -0.44 95
IV.TERO.HHZ. 2020-11-11T20:25:10.97 0.6 negative manual P 216 0.4326 121 0.13 51
IV.MF5.EHZ. 2020-11-11T20:25:09.81 0.6 undecidable manual P 272 0.3561 127 0.06 53
IV.MNTT.EHZ. 2020-11-11T20:25:09.03 0.1 positive manual P 289 0.2707 136 0.38 100
IV.MNTP.HNN. 2020-11-11T20:25:08.89 3.0 undecidable manual P 0.384 -1.25 0
IV.OFFI.HHZ. 2020-11-11T20:25:07.94 0.6 negative manual P 258 0.1952 145 0.11 54
IV.TRTR.HHE. 2020-11-11T20:25:05.82 3.0 undecidable manual P 0.1691 -1.77 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OFFI.HHE. ML:1.9 0.00026292305 0.2176 AML other m 2020-11-11T20:25:14.57
IV.OFFI.HHN. ML:1.7 0.00019204165 0.256 AML other m 2020-11-11T20:25:14.64
IV.MF5.EHE. ML:1.7 0.00011959835 0.3968 AML other m 2020-11-11T20:25:16.44
IV.MF5.EHN. ML:1.4 7.1678785E-5 0.3712 AML other m 2020-11-11T20:25:17.90
IV.TERO.HHE. ML:1.7 0.00010442991 0.2432 AML other m 2020-11-11T20:25:19.67
IV.TERO.HHN. ML:1.3 4.6225795E-5 0.2176 AML other m 2020-11-11T20:25:19.67
IV.TERO.HNE. ML:1.8 0.0001385175 0.2688 AML other m 2020-11-11T20:25:19.68
IV.TERO.HNN. ML:1.8 0.00014150779 0.4864 AML other m 2020-11-11T20:25:18.73
IV.GUMA.HNE. ML:2 0.00018683815 0.8064 AML other m 2020-11-11T20:25:19.68
IV.GUMA.HHE. ML:1.7 9.5303915E-5 0.3456 AML other m 2020-11-11T20:25:18.98
IV.CSP1.EHE. ML:1.6 6.216104E-5 0.3712 AML other m 2020-11-11T20:25:24.17
IV.CSP1.EHN. ML:1.6 6.4855605E-5 0.2432 AML other m 2020-11-11T20:25:23.24
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