Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 18-11-2020 and time 18:53:39 (UTC) in region 8 km NW Accumoli (RI)

A magnitude ML 1.0 earthquake occured in region: 8 km NW Accumoli (RI), on

  • 18-11-2020 18:53:39 (UTC)
  • 18-11-2020 19:53:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7530, 13.1940 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
Arquata del Tronto AP 9 1178 1845
Norcia PG 9 4957 6802
Cascia PG 15 3217 10019
Cittareale RI 15 482 10501
Montegallo AP 15 523 11024
Amatrice RI 16 2657 13681
Castelsantangelo sul Nera MC 16 281 13962
Acquasanta Terme AP 18 2916 16878
Preci PG 19 724 17602
Montemonaco AP 20 604 18206

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 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)
77 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
91 Km W of Chieti (51815 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km NE of Tivoli (56533 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
100 Km S of Ancona (100861 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
Reviewed
Rev100 		ML 1.0 2020-11-18
18:53:39		 42.7527 13.1935 10 2020-11-18
19:06:44		 Sala Sismica INGV-Roma 84830251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-18 18:53:39 ± 0.07
Latitude 42.7527 ± 0.0036
Longitude 13.1935 ± 0.0061
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 84830251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 477
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
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) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.09982
Epicentral distance of station farthest from the epicenter (degree) 0.46045
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:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 84830251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-18 19:06:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHE. 2020-11-18T18:53:55.81 0.3 undecidable manual S 277 51.1155 50 0.27 66
IV.CSP1.EHZ. 2020-11-18T18:53:52.17 0.3 undecidable manual S 1 37.629 50 0.21 69
IV.TERO.HHZ. 2020-11-18T18:53:51.12 0.3 undecidable manual S 113 36.4413 50 -0.52 64
IV.MF5.EHZ. 2020-11-18T18:53:51.68 0.3 undecidable manual S 40 33.9438 50 0.72 60
IV.FDMO.HHZ. 2020-11-18T18:53:50.42 0.3 undecidable manual S 345 32.6451 50 -0.2 69
IV.MOMA.HHE. 2020-11-18T18:53:49.40 1.0 undecidable manual P 277 51.1155 50 0.78 19
IV.LNSS.HHZ. 2020-11-18T18:53:47.05 0.3 undecidable manual S 217 20.7681 115 -0.08 73
IV.MMO1.EHZ. 2020-11-18T18:53:46.68 0.3 undecidable manual S 34 19.5693 116 -0.06 73
IV.SMA1.EHZ. 2020-11-18T18:53:46.82 0.3 undecidable manual S 139 17.7711 119 0.62 64
IV.CSP1.EHZ. 2020-11-18T18:53:46.32 0.3 undecidable manual P 1 37.629 50 -0.23 68
IV.MC2.EHZ. 2020-11-18T18:53:46.52 0.3 undecidable manual S 359 17.6712 119 0.38 69
IV.MF5.EHZ. 2020-11-18T18:53:46.15 0.1 undecidable manual P 40 33.9438 50 0.18 93
IV.FDMO.HHZ. 2020-11-18T18:53:45.52 0.1 undecidable manual P 345 32.6451 50 -0.25 92
IV.MTRA.EHZ. 2020-11-18T18:53:45.56 0.3 undecidable manual S 88 16.5723 121 -0.26 71
IV.TERO.HHZ. 2020-11-18T18:53:45.92 0.3 undecidable manual P 113 36.4413 50 -0.44 66
IV.T1299.HNZ. 2020-11-18T18:53:45.52 0.3 undecidable manual S 151 14.9739 123 0.16 72
IV.NRCA.HHZ. 2020-11-18T18:53:43.89 0.3 undecidable manual S 324 11.0778 131 -0.38 69
IV.MC2.EHZ. 2020-11-18T18:53:43.26 0.1 undecidable manual P 359 17.6712 119 0.07 98
IV.MMO1.EHZ. 2020-11-18T18:53:43.41 0.1 undecidable manual P 34 19.5693 116 -0.13 96
IV.LNSS.HHZ. 2020-11-18T18:53:43.62 0.1 undecidable manual P 217 20.7681 115 -0.14 96
IV.SMA1.EHZ. 2020-11-18T18:53:43.26 0.3 undecidable manual P 139 17.7711 119 0.04 74
IV.NRCA.HHZ. 2020-11-18T18:53:42.10 0.1 undecidable manual P 324 11.0778 131 -0.01 100
IV.MTRA.EHZ. 2020-11-18T18:53:42.91 0.1 undecidable manual P 88 16.5723 121 -0.1 97
IV.T1299.HNZ. 2020-11-18T18:53:42.88 0.1 undecidable manual P 151 14.9739 123 0.14 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.3 0.00026708185000000003 0.1408 AML other m 2020-11-18T18:53:44.15
IV.NRCA.HHN. ML:1.2 0.00018331389999999998 0.064 AML other m 2020-11-18T18:53:44.00
IV.NRCA.HNE. ML:1.3 0.00024376225000000002 0.128 AML other m 2020-11-18T18:53:44.08
IV.NRCA.HNN. ML:1.2 0.00016967179999999998 0.0512 AML other m 2020-11-18T18:53:44.01
IV.MTRA.EHE. ML:1.2 0.00013060605 0.3072 AML other m 2020-11-18T18:53:45.90
IV.MTRA.EHN. ML:1.0 0.000101087275 0.2048 AML other m 2020-11-18T18:53:45.72
IV.MTRA.HNE. ML:1.2 0.0001267013 0.1664 AML other m 2020-11-18T18:53:46.28
IV.MTRA.HNN. ML:1.1 0.00011240565 0.2176 AML other m 2020-11-18T18:53:45.72
IV.SMA1.EHE. ML:0.5 0.000025226585000000002 0.1664 AML other m 2020-11-18T18:53:47.20
IV.SMA1.EHN. ML:0.5 0.000026319978000000002 0.2048 AML other m 2020-11-18T18:53:48.09
IV.LNSS.HHE. ML:0.8 0.000043974639999999993 0.2432 AML other m 2020-11-18T18:53:48.19
IV.LNSS.HHN. ML:1.1 0.00008668507 0.1664 AML other m 2020-11-18T18:53:47.77
IV.TERO.HHE. ML:0.6 0.000015163978500000002 0.064 AML other m 2020-11-18T18:53:53.02
IV.TERO.HHN. ML:0.7 0.000019780237999999998 0.0768 AML other m 2020-11-18T18:53:51.43
IV.CSP1.EHE. ML:1.0 0.000037490206500000003 0.1536 AML other m 2020-11-18T18:53:53.02
IV.CSP1.EHN. ML:1.1 0.000046767255 0.1792 AML other m 2020-11-18T18:53:52.43
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