Earthquake 1 km S Terelle (FR), Magnitude ML 1.3, 23 December 2020 time 12:39:52 (Timezone Italy)

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) 41.5420, 13.7760 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.

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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
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
Gallinaro	FR	13	1269	92418
Pontecorvo	FR	13	13242	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
Alvito	FR	17	2713	123075
Fontechiari	FR	17	1303	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

Not available maps for this sismic event.

Seismic hazard

Not available maps for this sismic event.

Shakemap

Not available maps for this sismic event.

Felt maps

Not available maps for this sismic event.

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	41.5425	13.7757	1	2021-02-26 14:56:17	Bollettino Sismico Italiano INGV	86637991
Reviewed Rev100	ML 1.4	2020-12-23 11:39:50	41.4377	13.7145	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	41.5425 ± 0.0135
Longitude	13.7757 ± 0.0144
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)	1580.0
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(km)	Takeoff_angle	Residual	Weight
IV.PTQR.HHZ.	2020-12-23T11:40:03.32	0.6	undecidable	manual	P	330	61.5939	50	-1.12	32
IV.VAGA.HHZ.	2020-12-23T11:40:00.70	0.6	undecidable	manual	P	110	40.626	91	0.37	45
IV.GIUL.HHZ.	2020-12-23T11:40:00.27	0.3	undecidable	manual	P	272	43.3233	91	-0.59	63
IV.VVLD.HNE.	2020-12-23T11:39:59.60	0.3	undecidable	manual	P	341	38.4282	91	-0.28	69
IV.MIDA.HNN.	2020-12-23T11:39:59.87	0.3	undecidable	manual	P	74	41.2254	91	-0.57	63
IV.LIK.EHZ.01	2020-12-23T11:39:56.38	0.3	undecidable	manual	P	255	18.5703	92	0.47	68
IV.POFI.HNE.	2020-12-23T11:39:56.69	0.3	undecidable	manual	P	345	20.0688	91	0.48	68
IV.LRP.EHZ.	2020-12-23T11:39:56.39	0.1	undecidable	manual	P	307	19.4694	91	0.3	94
IV.CERA.HHZ.	2020-12-23T11:39:56.74	0.1	undecidable	manual	P	73	21.0678	91	0.34	93
IV.MCI.EHZ.	2020-12-23T11:39:53.37	0.1	undecidable	manual	P	151	6.4935	94	-0.12	100

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.LRP.EHE.	ML:1.4	0.00022399999999999997	0.68	AML	other	m	2020-12-23T11:40:01.36
IV.CERA.HNN.	ML:1.1	0.00008905346	1.5008	AML	other	m	2020-12-23T11:40:02.77
IV.LRP.EHN.	ML:1.0	0.00008054999999999999	1.22	AML	other	m	2020-12-23T11:40:04.79
IV.CERA.HHN.	ML:1.4	0.00022099999999999998	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

Not available TDMT solution for this seismic event.

Fault Plane solutions in the area

Not available maps for this sismic event.

Download

Type	Description	Link
QuakeML - small	Event, Origin, FocalMechanism	Download
QuakeML - full	Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude	Download

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)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:1.3

ML:1.4