Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 17-11-2020 and time 07:32:09 (Italy) in region 8 km NW Accumoli (RI)

A magnitude ML 1.5 earthquake occured in region: 8 km NW Accumoli (RI), on

  • 17-11-2020 06:32:09 (UTC)
  • 17-11-2020 07:32:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.75, 13.19 at 10 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.

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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
Accumoli RI 8 667 667
Norcia PG 9 4957 5624
Arquata del Tronto AP 9 1178 6802
Cascia PG 15 3217 10019
Cittareale RI 15 482 10501
Montegallo AP 16 523 11024
Amatrice RI 16 2657 13681
Castelsantangelo sul Nera MC 16 281 13962
Acquasanta Terme AP 18 2916 16878
Preci PG 19 724 17602

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
48 Km NW of L'Aquila (69753 inhabitants)
49 Km E of Terni (111501 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Chieti (51815 inhabitants)
93 Km NE of Tivoli (56533 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
100 Km S of Ancona (100861 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 1.5 2020-11-17
06:32:09		 42.75 13.19 10 2020-11-17
06:36:40		 Sala Sismica INGV-Roma 84794651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-17 06:32:09 ± 0.06
Latitude 42.75 ± 0.00
Longitude 13.19 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84794651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 398
Semi-minor axis of confidence ellipse (meter) 288
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 101
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.09803
Epicentral distance of station farthest from the epicenter (degree) 0.33994
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 84794651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-17 06:36:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-11-17T06:32:22.26 0.6 undecidable manual S 2 0.3399 50 0.43 44
IV.TERO.HHZ. 2020-11-17T06:32:21.01 0.6 undecidable manual S 113 0.3318 50 -0.56 42
IV.MF5.EHZ. 2020-11-17T06:32:21.78 0.6 undecidable manual S 40 0.3085 50 0.88 37
IV.FDMO.HHZ. 2020-11-17T06:32:20.38 0.6 undecidable manual S 346 0.2941 50 -0.08 48
IV.GAVE.EHZ. 2020-11-17T06:32:18.29 0.6 undecidable manual S 255 0.2239 112 -0.02 49
IV.LNSS.HHZ. 2020-11-17T06:32:17.02 0.6 undecidable manual S 216 0.1844 116 0.1 48
IV.MF5.EHZ. 2020-11-17T06:32:16.07 0.1 undecidable manual P 40 0.3085 50 0.19 93
IV.SMA1.EHZ. 2020-11-17T06:32:16.75 0.6 undecidable manual S 138 0.1628 119 0.57 43
IV.MMO1.HNE. 2020-11-17T06:32:16.66 0.6 undecidable manual S 35 0.179 117 -0.09 49
IV.CSP1.EHZ. 2020-11-17T06:32:16.28 0.1 undecidable manual P 2 0.3399 50 -0.14 93
IV.MC2.EHZ. 2020-11-17T06:32:16.43 0.6 undecidable manual S 0 0.1601 119 0.35 46
IV.MTRA.EHZ. 2020-11-17T06:32:15.48 0.3 undecidable manual S 88 0.1529 120 -0.38 69
IV.T1299.HNN. 2020-11-17T06:32:15.65 0.6 undecidable manual S 149 0.1367 123 0.34 47
IV.FDMO.HHZ. 2020-11-17T06:32:15.46 0.1 undecidable manual P 346 0.2941 50 -0.17 94
IV.TERO.HHZ. 2020-11-17T06:32:15.99 0.3 undecidable manual P 113 0.3318 50 -0.28 68
IV.GAVE.EHZ. 2020-11-17T06:32:14.28 0.1 undecidable manual P 255 0.2239 112 -0.11 96
IV.LNSS.HHZ. 2020-11-17T06:32:13.56 0.1 positive manual P 216 0.1844 116 -0.02 99
IV.SMA1.EHZ. 2020-11-17T06:32:13.19 0.1 undecidable manual P 138 0.1628 119 0.03 99
IV.MMO1.HNE. 2020-11-17T06:32:13.34 0.1 undecidable manual P 35 0.179 117 -0.15 96
IV.NRCA.HHZ. 2020-11-17T06:32:13.84 0.6 undecidable manual S 327 0.098 132 -0.31 47
IV.MC2.EHZ. 2020-11-17T06:32:13.19 0.1 undecidable manual P 0 0.1601 119 0.09 98
IV.NRCA.HHZ. 2020-11-17T06:32:12.02 0.1 positive manual P 327 0.098 132 0.03 100
IV.MTRA.EHZ. 2020-11-17T06:32:12.87 0.1 positive manual P 88 0.1529 120 -0.11 97
IV.T1299.HNN. 2020-11-17T06:32:12.79 0.1 undecidable manual P 149 0.1367 123 0.13 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.0003215 0.08 AML other m 2020-11-17T06:32:13.95
IV.NRCA.HNE. ML:1.6 0.0005205 0.12 AML other m 2020-11-17T06:32:14.09
IV.NRCA.HHE. ML:1.7 0.000552 0.12 AML other m 2020-11-17T06:32:14.09
IV.NRCA.HNN. ML:1.4 0.0003085 1.3 AML other m 2020-11-17T06:32:14.92
IV.MTRA.EHN. ML:1.6 0.0003665 0.22 AML other m 2020-11-17T06:32:15.66
IV.MTRA.EHE. ML:1.8 0.000499 0.3 AML other m 2020-11-17T06:32:15.68
IV.LNSS.HHE. ML:1.3 0.000153 1.56 AML other m 2020-11-17T06:32:17.89
IV.LNSS.HHN. ML:1.5 0.00025 0.14 AML other m 2020-11-17T06:32:17.72
IV.GAVE.EHE. ML:1.6 0.0002295 1.8 AML other m 2020-11-17T06:32:18.02
IV.GAVE.EHN. ML:1.4 0.0001645 0.6 AML other m 2020-11-17T06:32:19.13
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