Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 02-12-2020 and time 19:28:55 (Italy) in region 4 km E Accumoli (RI)

A magnitude ML 1.9 earthquake occured in region: 4 km E Accumoli (RI), on

  • 02-12-2020 18:28:55 (UTC)
  • 02-12-2020 19:28:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6980, 13.2920 at 13 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
Accumoli RI 4 667 667
Amatrice RI 8 2657 3324
Arquata del Tronto AP 8 1178 4502
Acquasanta Terme AP 13 2916 7418
Cittareale RI 14 482 7900
Montegallo AP 17 523 8423
Campotosto AQ 17 542 8965
Valle Castellana TE 17 977 9942
Rocca Santa Maria TE 19 537 10479
Norcia PG 19 4957 15436
Cortino TE 20 656 16092
Montereale AQ 20 2581 18673
Capitignano AQ 20 665 19338

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km W of Teramo (54892 inhabitants)
40 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
80 Km W of Pescara (121014 inhabitants)
82 Km W of Chieti (51815 inhabitants)
87 Km SE of Perugia (166134 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km NE of Tivoli (56533 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 1.9 2020-12-02
18:28:55		 42.6982 13.2925 13 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86173931
Reviewed
Rev100 		ML 1.9 2020-12-02
18:28:54		 42.7008 13.3067 14 2020-12-02
20:45:51		 Sala Sismica INGV-Roma 85161861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-02 18:28:55 ± 0.09
Latitude 42.6982 ± 0.0036
Longitude 13.2925 ± 0.0073
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86173931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 553
Semi-minor axis of confidence ellipse (meter) 206
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 279
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
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) 0.06385
Epicentral distance of station farthest from the epicenter (degree) 0.64571
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 86173931
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-28 11:40:28

ML:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations 14
Type of magnitude ML
Reference to an origin 85161861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-02 20:45:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-12-02T18:29:09.51 0.6 undecidable manual S 351 44.2224 93 0.07 47
IV.EL6.EHZ. 2020-12-02T18:29:07.66 0.3 undecidable manual P 348 71.6727 91 0.03 68
IV.MF5.EHZ. 2020-12-02T18:29:07.93 0.6 undecidable manual S 23 34.9428 94 0.99 35
IV.T0110.HHZ. 2020-12-02T18:29:06.79 0.6 undecidable manual P 143 65.3901 92 0.14 44
IV.GIGS.HHN. 2020-12-02T18:29:06.92 0.6 undecidable manual S 140 35.5422 94 -0.19 47
IV.MC2.EHZ. 2020-12-02T18:29:04.48 0.3 undecidable manual S 340 25.1526 97 0.13 73
IV.TERO.HHZ. 2020-12-02T18:29:04.39 0.3 undecidable manual S 108 26.751 96 -0.38 69
IV.MMO1.EHZ. 2020-12-02T18:29:03.39 0.6 undecidable manual S 7 22.4553 99 -0.26 47
IV.LNSS.HHZ. 2020-12-02T18:29:03.96 0.3 undecidable manual S 243 23.1546 98 0.15 73
IV.OFFI.HHZ. 2020-12-02T18:29:03.69 0.3 undecidable manual P 50 41.4252 93 0.73 58
IV.CSP1.EHZ. 2020-12-02T18:29:03.19 0.1 negative manual P 351 44.2224 93 -0.21 91
IV.ARRO.EHZ. 2020-12-02T18:29:03.42 0.3 undecidable manual P 253 45.0216 93 -0.09 70
IV.NRCA.HNZ. 2020-12-02T18:29:02.91 0.3 undecidable manual S 316 20.868 100 -0.32 69
IV.MF5.EHZ. 2020-12-02T18:29:02.28 0.1 positive manual P 23 34.9428 94 0.32 91
IV.GIGS.HHN. 2020-12-02T18:29:01.65 0.3 undecidable manual P 140 35.5422 94 -0.41 67
IV.SMA1.EHZ. 2020-12-02T18:29:00.30 0.3 undecidable manual S 155 8.2806 137 0.08 75
IV.MC2.EHZ. 2020-12-02T18:29:00.49 0.3 undecidable manual P 340 25.1526 97 0.03 74
IV.MTRA.HNZ. 2020-12-02T18:29:00.35 0.3 undecidable manual S 52 10.6782 127 -0.35 71
IV.LNSS.HHZ. 2020-12-02T18:29:00.19 0.1 positive manual P 243 23.1546 98 0.03 99
IV.T1299.HNN. 2020-12-02T18:29:00.18 0.6 undecidable manual S 187 7.0929 142 0.16 50
IV.TERO.HHZ. 2020-12-02T18:29:00.39 0.3 undecidable manual P 108 26.751 96 -0.32 70
IV.NRCA.HNZ. 2020-12-02T18:28:59.64 0.3 undecidable manual P 316 20.868 100 -0.17 71
IV.MMO1.EHZ. 2020-12-02T18:28:59.92 0.1 negative manual P 7 22.4553 99 -0.14 96
IV.T1299.HNN. 2020-12-02T18:28:58.28 0.3 undecidable manual P 187 7.0929 142 0.32 72
IV.SMA1.EHZ. 2020-12-02T18:28:58.23 0.1 undecidable manual P 155 8.2806 137 0.15 99
IV.MTRA.HNZ. 2020-12-02T18:28:58.30 0.1 negative manual P 52 10.6782 127 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:2.0 0.0010627361500000002 0.128 AML other m 2020-12-02T18:29:00.33
IV.SMA1.EHE. ML:1.8 0.0007395 0.1 AML other m 2020-12-02T18:29:00.33
IV.MTRA.HNN. ML:1.7 0.0005412813000000001 0.064 AML other m 2020-12-02T18:29:00.44
IV.MTRA.EHN. ML:1.7 0.0005496320999999999 0.064 AML other m 2020-12-02T18:29:00.44
IV.MTRA.EHE. ML:1.8 0.00060242255 0.0768 AML other m 2020-12-02T18:29:00.44
IV.MTRA.HNE. ML:1.8 0.0006079631 0.0768 AML other m 2020-12-02T18:29:00.44
IV.NRCA.HNN. ML:2.0 0.00070214995 0.128 AML other m 2020-12-02T18:29:03.10
IV.NRCA.HHN. ML:2.0 0.0006670000000000001 0.12 AML other m 2020-12-02T18:29:03.10
IV.NRCA.HHE. ML:1.9 0.00055955295 0.128 AML other m 2020-12-02T18:29:03.17
IV.NRCA.HNE. ML:1.9 0.0004850622 0.1152 AML other m 2020-12-02T18:29:03.80
IV.LNSS.HNN. ML:1.8 0.00040397238 0.192 AML other m 2020-12-02T18:29:04.20
IV.LNSS.HHN. ML:1.8 0.0004137019 0.2048 AML other m 2020-12-02T18:29:04.20
IV.LNSS.HNE. ML:1.8 0.0003960848 0.1152 AML other m 2020-12-02T18:29:04.80
IV.LNSS.HHE. ML:1.8 0.00041282779999999994 0.128 AML other m 2020-12-02T18:29:04.81
IV.MF5.EHN. ML:1.9 0.00028544075 2.0864 AML other m 2020-12-02T18:29:04.88
IV.CSP1.EHN. ML:2.1 0.0003751328 2.0352 AML other m 2020-12-02T18:29:07.44
IV.OFFI.HHE. ML:2.6 0.0012156864999999998 1.8304 AML other m 2020-12-02T18:29:09.36
IV.MF5.EHE. ML:2.2 0.00062585515 1.9968 AML other m 2020-12-02T18:29:11.49
IV.CSP1.EHE. ML:2.1 0.00034070279999999997 1.9328 AML other m 2020-12-02T18:29:23.33
IV.OFFI.HHN. ML:2.3 0.000713464 1.4976 AML other m 2020-12-02T18:29:24.19
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