Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 09-12-2020 and time 19:16:15 (Italy) in region 7 km NW Accumoli (RI)

A magnitude ML 2.3 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 09-12-2020 18:16:15 (UTC)
  • 09-12-2020 19:16:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7440, 13.1870 at 9 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 7 667 667
Norcia PG 9 4957 5624
Arquata del Tronto AP 10 1178 6802
Cittareale RI 14 482 7284
Cascia PG 14 3217 10501
Amatrice RI 15 2657 13158
Montegallo AP 16 523 13681
Castelsantangelo sul Nera MC 17 281 13962
Acquasanta Terme AP 19 2916 16878
Preci PG 19 724 17602

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
47 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 NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Chieti (51815 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
96 Km E of Viterbo (67173 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 2.3 2020-12-09
18:16:15		 42.7437 13.1868 9 2021-02-26
14:56:19		 Bollettino Sismico Italiano INGV 87263391
Reviewed
Rev100 		ML 2.4 2020-12-09
18:16:15		 42.7488 13.1918 10 2020-12-09
18:22:46		 Sala Sismica INGV-Roma 85321971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-09 18:16:15 ± 0.06
Latitude 42.7437 ± 0.0036
Longitude 13.1868 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87263391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 410
Semi-minor axis of confidence ellipse (meter) 241
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 51
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.10432
Epicentral distance of station farthest from the epicenter (degree) 0.93799
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 60
Type of magnitude ML
Reference to an origin 87263391
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-18 02:06:03

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 61
Type of magnitude ML
Reference to an origin 85321971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-09 18:22:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-12-09T18:16:36.39 0.6 undecidable manual S 354 65.2902 50 0.7 38
IV.SNTG.HHZ. 2020-12-09T18:16:34.59 0.6 undecidable manual S 341 60.0954 50 0.29 44
IV.MPAG.EHZ. 2020-12-09T18:16:33.64 0.3 undecidable manual P 341 104.118 50 0.54 56
IV.ASSB.HHZ. 2020-12-09T18:16:33.09 0.6 undecidable manual S 308 54.2013 50 0.37 43
IV.OFFI.HHZ. 2020-12-09T18:16:32.80 0.6 undecidable manual S 62 45.8208 50 2.33 13
IV.ARVD.HHZ. 2020-12-09T18:16:30.36 0.3 undecidable manual P 347 86.0472 50 0.06 65
IV.SAP2.EHZ. 2020-12-09T18:16:30.58 0.6 undecidable manual S 24 42.8238 50 0.91 36
IV.MURB.HHZ. 2020-12-09T18:16:29.67 0.6 undecidable manual P 317 78.7656 50 0.48 40
IV.T0110.HHZ. 2020-12-09T18:16:28.41 0.3 undecidable manual P 140 74.6697 50 -0.15 65
IV.GUMA.HHZ. 2020-12-09T18:16:28.78 0.6 undecidable manual S 19 37.3293 50 0.55 43
IV.MF5.EHZ. 2020-12-09T18:16:28.16 0.6 undecidable manual S 39 35.0427 50 0.56 43
IV.ARRO.EHZ. 2020-12-09T18:16:28.78 0.6 undecidable manual S 242 38.9277 50 0.15 47
IV.CSP1.EHZ. 2020-12-09T18:16:28.46 0.6 undecidable manual S 2 38.628 50 -0.1 47
IV.TERO.HHZ. 2020-12-09T18:16:27.24 0.6 undecidable manual S 111 36.5412 50 -0.76 39
IV.CESI.HHZ. 2020-12-09T18:16:27.87 0.6 undecidable manual S 322 36.9297 50 -0.25 46
IV.SNTG.HHZ. 2020-12-09T18:16:26.13 0.3 undecidable manual P 341 60.0954 50 -0.18 67
IV.FDMO.HHZ. 2020-12-09T18:16:26.90 0.6 undecidable manual S 346 33.4443 50 -0.29 46
IV.EL6.EHZ. 2020-12-09T18:16:26.89 0.1 undecidable manual P 354 65.2902 50 -0.23 87
IV.ASSB.HHZ. 2020-12-09T18:16:25.22 0.3 undecidable manual P 308 54.2013 50 -0.19 67
IV.CAMP.HHZ. 2020-12-09T18:16:25.01 0.6 undecidable manual S 142 29.3484 50 -1.07 35
IV.MNTT.EHZ. 2020-12-09T18:16:25.02 0.3 undecidable manual P 43 48.5181 50 0.5 64
IV.MOMA.HHZ. 2020-12-09T18:16:24.81 0.3 undecidable manual P 278 50.7159 50 -0.04 70
IV.FEMA.HNE. 2020-12-09T18:16:24.92 0.6 undecidable manual S 335 26.6511 109 -0.29 46
IV.OFFI.HHZ. 2020-12-09T18:16:24.72 0.3 undecidable manual P 62 45.8208 50 0.61 61
IV.GAVE.EHZ. 2020-12-09T18:16:24.80 0.6 undecidable manual S 257 24.5532 111 0.28 47
IV.CESX.HHZ. 2020-12-09T18:16:24.74 0.3 undecidable manual P 253 51.2154 50 -0.19 68
IV.SAP2.EHZ. 2020-12-09T18:16:23.84 0.1 undecidable manual P 24 42.8238 50 0.2 92
IV.LNSS.HHZ. 2020-12-09T18:16:23.26 0.3 undecidable manual S 217 19.6692 115 0.29 70
IV.CESI.HHZ. 2020-12-09T18:16:22.48 0.1 undecidable manual P 322 36.9297 50 -0.27 91
IV.CSP1.EHZ. 2020-12-09T18:16:22.65 0.1 positive manual P 2 38.628 50 -0.35 89
IV.SMA1.EHZ. 2020-12-09T18:16:22.73 0.6 undecidable manual S 136 17.4714 118 0.46 45
IV.TERO.HHZ. 2020-12-09T18:16:22.22 0.1 undecidable manual P 111 36.5412 50 -0.46 88
IV.GUMA.HHZ. 2020-12-09T18:16:22.78 0.1 undecidable manual P 19 37.3293 50 -0.03 96
IV.MC2.EHZ. 2020-12-09T18:16:22.77 0.3 undecidable manual S 1 18.5703 117 0.14 73
IV.MF5.EHZ. 2020-12-09T18:16:22.50 0.1 positive manual P 39 35.0427 50 0.06 96
IV.ARRO.EHZ. 2020-12-09T18:16:22.89 0.1 undecidable manual P 242 38.9277 50 -0.15 93
IV.MMO1.EHZ. 2020-12-09T18:16:22.95 0.3 undecidable manual S 33 20.6682 114 -0.33 70
IV.CAMP.HHZ. 2020-12-09T18:16:21.24 0.1 positive manual P 142 29.3484 50 -0.33 91
IV.MTRA.EHZ. 2020-12-09T18:16:21.80 0.3 undecidable manual S 85 17.1717 119 -0.38 69
IV.FDMO.HHZ. 2020-12-09T18:16:21.82 0.1 positive manual P 346 33.4443 50 -0.39 90
IV.T1299.EHN. 2020-12-09T18:16:21.81 0.3 undecidable manual S 147 14.3745 123 0.44 69
IV.FEMA.HNE. 2020-12-09T18:16:20.75 0.3 undecidable manual P 335 26.6511 109 -0.32 69
IV.NRCA.HNZ. 2020-12-09T18:16:20.26 0.3 undecidable manual S 329 11.5773 129 -0.31 71
IV.GAVE.EHZ. 2020-12-09T18:16:20.67 0.1 undecidable manual P 257 24.5532 111 0.01 98
IV.MC2.EHZ. 2020-12-09T18:16:19.60 0.1 positive manual P 1 18.5703 117 0.02 99
IV.T1299.EHN. 2020-12-09T18:16:19.18 0.1 undecidable manual P 147 14.3745 123 0.33 94
IV.MMO1.EHZ. 2020-12-09T18:16:19.76 0.1 undecidable manual P 33 20.6682 114 -0.19 95
IV.MTRA.EHZ. 2020-12-09T18:16:19.26 0.1 positive manual P 85 17.1717 119 -0.06 99
IV.LNSS.HHZ. 2020-12-09T18:16:19.96 0.1 positive manual P 217 19.6692 115 0.19 96
IV.SMA1.EHZ. 2020-12-09T18:16:19.42 0.1 undecidable manual P 136 17.4714 118 0.05 99
IV.NRCA.HNZ. 2020-12-09T18:16:18.43 0.1 positive manual P 329 11.5773 129 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.6 0.004645 0.14 AML other m 2020-12-09T18:16:20.44
IV.NRCA.HNE. ML:2.7 0.00569 0.16 AML other m 2020-12-09T18:16:20.53
IV.NRCA.HHE. ML:2.7 0.00645 0.14 AML other m 2020-12-09T18:16:20.52
IV.MTRA.HNE. ML:2.8 0.005730000000000001 0.72 AML other m 2020-12-09T18:16:22.09
IV.MTRA.EHE. ML:2.8 0.005745 0.72 AML other m 2020-12-09T18:16:22.09
IV.MTRA.EHN. ML:2.7 0.004529999999999999 0.42 AML other m 2020-12-09T18:16:22.52
IV.MTRA.HNN. ML:2.7 0.00451 0.26 AML other m 2020-12-09T18:16:22.85
IV.LNSS.HHE. ML:2.6 0.00299 0.24 AML other m 2020-12-09T18:16:23.58
IV.LNSS.HNE. ML:2.6 0.0029100000000000003 0.24 AML other m 2020-12-09T18:16:23.58
IV.LNSS.HHN. ML:2.6 0.00317 1.16 AML other m 2020-12-09T18:16:23.97
IV.LNSS.HNN. ML:2.6 0.002915 1.16 AML other m 2020-12-09T18:16:23.97
IV.SMA1.EHE. ML:2.4 0.0023049999999999998 0.34 AML other m 2020-12-09T18:16:24.82
IV.GAVE.EHN. ML:2.4 0.0017250000000000002 0.72 AML other m 2020-12-09T18:16:25.58
IV.GAVE.HNN. ML:2.0 0.000639 0.72 AML other m 2020-12-09T18:16:25.58
IV.GAVE.EHE. ML:2.4 0.001595 0.18 AML other m 2020-12-09T18:16:25.57
IV.GAVE.HNE. ML:2.4 0.0014849999999999998 0.52 AML other m 2020-12-09T18:16:25.48
IV.SMA1.EHN. ML:2.2 0.001375 1.58 AML other m 2020-12-09T18:16:26.00
IV.FDMO.HHE. ML:2.1 0.0005449999999999999 0.76 AML other m 2020-12-09T18:16:27.68
IV.FDMO.HHN. ML:2.1 0.0005695 0.48 AML other m 2020-12-09T18:16:27.71
IV.CESI.HHE. ML:2.2 0.0005765 0.2 AML other m 2020-12-09T18:16:28.18
IV.CESI.HHN. ML:2.4 0.0010400000000000001 0.3 AML other m 2020-12-09T18:16:28.34
IV.CAMP.HHN. ML:1.6 0.00021100000000000003 0.4 AML other m 2020-12-09T18:16:28.81
IV.CSP1.EHE. ML:2.9 0.002655 0.4 AML other m 2020-12-09T18:16:29.30
IV.GUMA.HHE. ML:3.1 0.00541 0.26 AML other m 2020-12-09T18:16:29.24
IV.GUMA.HNE. ML:3.1 0.004595 0.24 AML other m 2020-12-09T18:16:29.24
IV.GUMA.HNN. ML:2.8 0.002385 0.44 AML other m 2020-12-09T18:16:29.09
IV.GUMA.HHN. ML:3.0 0.0035700000000000003 1.04 AML other m 2020-12-09T18:16:29.76
IV.CSP1.EHN. ML:3.0 0.003205 0.94 AML other m 2020-12-09T18:16:29.94
IV.ARRO.EHN. ML:1.9 0.000317 1.14 AML other m 2020-12-09T18:16:30.08
IV.SAP2.EHN. ML:3.5 0.010010000000000002 1.36 AML other m 2020-12-09T18:16:30.14
IV.CAMP.HHE. ML:1.8 0.0002925 1.28 AML other m 2020-12-09T18:16:30.34
IV.MF5.EHN. ML:2.2 0.000707 0.52 AML other m 2020-12-09T18:16:31.20
IV.SAP2.EHE. ML:2.6 0.0013599999999999999 0.48 AML other m 2020-12-09T18:16:31.04
IV.MF5.EHE. ML:2.2 0.0007465 0.34 AML other m 2020-12-09T18:16:31.81
IV.ARRO.EHE. ML:1.8 0.000253 0.18 AML other m 2020-12-09T18:16:32.03
IV.MOMA.HNN. ML:2.5 0.0008245 0.52 AML other m 2020-12-09T18:16:33.26
IV.MOMA.HNE. ML:2.2 0.0004465 1.78 AML other m 2020-12-09T18:16:33.97
IV.MOMA.HHE. ML:2.2 0.00044750000000000004 1.78 AML other m 2020-12-09T18:16:33.97
IV.MOMA.HHN. ML:2.2 0.0003715 0.74 AML other m 2020-12-09T18:16:34.04
IV.CESX.HHE. ML:2.0 0.0002455 0.66 AML other m 2020-12-09T18:16:34.12
IV.OFFI.HHE. ML:2.3 0.0005825 0.34 AML other m 2020-12-09T18:16:34.51
IV.CESX.HHN. ML:2.0 0.0002375 0.66 AML other m 2020-12-09T18:16:34.84
IV.MNTT.EHE. ML:2.5 0.0008975 0.32 AML other m 2020-12-09T18:16:35.04
IV.MNTT.EHN. ML:2.5 0.000954 0.54 AML other m 2020-12-09T18:16:35.04
IV.ASSB.HHE. ML:2.1 0.00028900000000000003 0.3 AML other m 2020-12-09T18:16:35.34
IV.ASSB.HHN. ML:2.0 0.000224 0.36 AML other m 2020-12-09T18:16:35.53
IV.SNTG.HHN. ML:1.9 0.0001595 0.72 AML other m 2020-12-09T18:16:35.83
IV.SNTG.HHE. ML:1.9 0.000168 0.12 AML other m 2020-12-09T18:16:35.89
IV.OFFI.HHN. ML:2.4 0.0008320000000000001 0.76 AML other m 2020-12-09T18:16:35.95
IV.EL6.EHN. ML:2.2 0.0003085 0.74 AML other m 2020-12-09T18:16:39.12
IV.EL6.EHE. ML:2.3 0.00039449999999999994 0.44 AML other m 2020-12-09T18:16:40.59
IV.T0110.HHE. ML:2.0 0.0001575 1.58 AML other m 2020-12-09T18:16:41.88
IV.MURB.HHN. ML:2.3 0.0003015 0.28 AML other m 2020-12-09T18:16:43.62
IV.ARVD.HHE. ML:1.9 0.00009453555 1.8208 AML other m 2020-12-09T18:16:44.04
IV.T0110.HHN. ML:2.1 0.00020150000000000002 0.44 AML other m 2020-12-09T18:16:44.44
IV.MPAG.HNE. ML:2.3 0.0001901832 0.2688 AML other m 2020-12-09T18:16:48.97
IV.MPAG.EHE. ML:2.2 0.00012919612 0.2688 AML other m 2020-12-09T18:16:48.71
IV.MPAG.EHN. ML:2.0 0.00009598847 0.2176 AML other m 2020-12-09T18:16:48.95
IV.MURB.HHE. ML:2.4 0.000357 1.46 AML other m 2020-12-09T18:16:48.95
IV.ARVD.HHN. ML:1.8 0.0000771 0.64 AML other m 2020-12-09T18:16:54.57
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
Waveforms Seismic signals in miniseed + resp format Download