Earthquake (quarry blast) with magnitude of ML 1.3 on date 23-12-2020 and time 12:39:52 (Italy) in region 1 km S Terelle (FR)

A magnitude ML 1.3 (quarry blast) earthquake occured in region: 1 km S Terelle (FR), on

  • 23-12-2020 11:39:52 (UTC)
  • 23-12-2020 12:39:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.54, 13.78 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Terelle FR 1 422 422
Villa Santa Lucia FR 4 2632 3054
Belmonte Castello FR 5 739 3793
Piedimonte San Germano FR 5 6535 10328
Castrocielo FR 7 3965 14293
Colle San Magno FR 7 699 14992
Cassino FR 7 36142 51134
Sant'Elia Fiumerapido FR 8 6166 57300
Aquino FR 8 5370 62670
Roccasecca FR 9 7365 70035
Atina FR 9 4316 74351
Villa Latina FR 10 1241 75592
Casalattico FR 10 574 76166
Casalvieri FR 11 2698 78864
Vallerotonda FR 12 1581 80445
Pignataro Interamna FR 12 2595 83040
Cervaro FR 13 8109 91149
Pontecorvo FR 13 13242 104391
Gallinaro FR 13 1269 105660
Santopadre FR 14 1357 107017
Picinisco FR 14 1218 108235
Colfelice FR 14 1932 110167
Acquafondata FR 15 263 110430
San Biagio Saracinisco FR 15 349 110779
San Giorgio a Liri FR 15 3164 113943
Settefrati FR 16 728 114671
San Vittore del Lazio FR 16 2636 117307
Vicalvi FR 16 783 118090
Viticuso FR 16 353 118443
Sant'Apollinare FR 16 1919 120362
Fontechiari FR 17 1303 121665
Alvito FR 17 2713 124378
Rocca d'Arce FR 17 959 125337
Arce FR 18 5756 131093
Arpino FR 18 7262 138355
Posta Fibreno FR 18 1139 139494
Castelnuovo Parano FR 18 883 140377
San Pietro Infine CE 19 944 141321
Sant'Ambrogio sul Garigliano FR 19 966 142287
San Giovanni Incarico FR 19 3336 145623
San Donato Val di Comino FR 19 2107 147730
Esperia FR 19 3828 151558
Rocca d'Evandro CE 19 3283 154841
Vallemaio FR 20 937 155778

Municipalities with at least 50000 inhabitants

An earthquake occurred to
70 Km NW of Caserta (76326 inhabitants)
73 Km NW of Aversa (53047 inhabitants)
73 Km E of Latina (125985 inhabitants)
77 Km NW of Giugliano in Campania (122974 inhabitants)
80 Km NW of Marano di Napoli (59874 inhabitants)
82 Km NW of Pozzuoli (81661 inhabitants)
82 Km NW of Afragola (65057 inhabitants)
83 Km NW of Casoria (77642 inhabitants)
83 Km NW of Acerra (59573 inhabitants)
85 Km E of Velletri (53303 inhabitants)
88 Km NW of Napoli (974074 inhabitants)
93 Km NW of Portici (55274 inhabitants)
94 Km SE of Tivoli (56533 inhabitants)
94 Km E of Aprilia (73446 inhabitants)
94 Km NW of Ercolano (53709 inhabitants)
95 Km SE of L'Aquila (69753 inhabitants)
96 Km W of Benevento (60091 inhabitants)
96 Km SW of Chieti (51815 inhabitants)
96 Km E of Anzio (54211 inhabitants)
97 Km NW of Torre del Greco (86275 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 1.3 2020-12-23
11:39:52
41.54 13.78 1 2021-02-26
14:56:17
Bollettino Sismico Italiano INGV 86637991
Reviewed
Rev100
ML 1.4 2020-12-23
11:39:50
41.44 13.71 10 2020-12-23
11:46:33
Sala Sismica INGV-Roma 85648911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-23 11:39:52 ± 0.18
Latitude 41.54 ± 0.01
Longitude 13.78 ± 0.01
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 86637991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1580
Semi-minor axis of confidence ellipse (meter) 1080
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 23
Circular confidence region, given by single value of horizontal uncertainty (meter) 1580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.55488
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 86637991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-27 18:26:33

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 85648911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-23 11:46:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PTQR.HHZ. 2020-12-23T11:40:03.32 0.6 undecidable manual P 330 0.5549 50 -1.12 32
IV.VAGA.HHZ. 2020-12-23T11:40:00.70 0.6 undecidable manual P 110 0.366 91 0.37 45
IV.GIUL.HHZ. 2020-12-23T11:40:00.27 0.3 undecidable manual P 272 0.3903 91 -0.59 63
IV.MIDA.HNN. 2020-12-23T11:39:59.87 0.3 undecidable manual P 74 0.3714 91 -0.57 63
IV.VVLD.HNE. 2020-12-23T11:39:59.60 0.3 undecidable manual P 341 0.3462 91 -0.28 69
IV.LRP.EHZ. 2020-12-23T11:39:56.39 0.1 undecidable manual P 307 0.1754 91 0.3 94
IV.CERA.HHZ. 2020-12-23T11:39:56.74 0.1 undecidable manual P 73 0.1898 91 0.34 93
IV.LIK.EHZ.01 2020-12-23T11:39:56.38 0.3 undecidable manual P 255 0.1673 92 0.47 68
IV.POFI.HNE. 2020-12-23T11:39:56.69 0.3 undecidable manual P 345 0.1808 91 0.48 68
IV.MCI.EHZ. 2020-12-23T11:39:53.37 0.1 undecidable manual P 151 0.0585 94 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCI.EHN. ML:0 0.00554 0.24 AML other m 2020-12-23T11:39:56.61
IV.LRP.EHE. ML:1.4 0.000224 0.68 AML other m 2020-12-23T11:40:01.36
IV.CERA.HNN. ML:0 0.0002145 1.04 AML other m 2020-12-23T11:40:04.36
IV.LRP.EHN. ML:1 8.055E-5 1.22 AML other m 2020-12-23T11:40:04.79
IV.CERA.HHN. ML:1.4 0.000221 1.04 AML other m 2020-12-23T11:40:04.36
IV.CERA.HNE. ML:1.4 0.000192 0.88 AML other m 2020-12-23T11:40:10.85
IV.CERA.HHE. ML:1.3 0.0001725 0.88 AML other m 2020-12-23T11:40:10.85
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