Earthquake 4 km SW Norcia (PG), Magnitude ML 0.8, 10 December 2021 time 10:47:17 (Timezone Italy)

A magnitude ML 0.8 earthquake occured in region: 4 km SW Norcia (PG), on

10-12-2021 09:47:17 (UTC)
10-12-2021 10:47:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7620, 13.0730 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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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
Norcia	PG	4	4957	4957
Cascia	PG	7	3217	8174
Poggiodomo	PG	13	117	8291
Preci	PG	13	724	9015
Cerreto di Spoleto	PG	14	1075	10090
Monteleone di Spoleto	PG	16	599	10689
Castelsantangelo sul Nera	MC	16	281	10970
Accumoli	RI	16	667	11637
Vallo di Nera	PG	17	364	12001
Cittareale	RI	18	482	12483
Arquata del Tronto	AP	18	1178	13661
Sellano	PG	19	1079	14740
Visso	MC	19	1107	15847
Sant'Anatolia di Narco	PG	20	564	16411

Municipalities with at least 50000 inhabitants

An earthquake occurred to

37 Km SE of Foligno (57155 inhabitants)

41 Km NE of Terni (111501 inhabitants)

53 Km W of Teramo (54892 inhabitants)

53 Km NW of L'Aquila (69753 inhabitants)

68 Km SE of Perugia (166134 inhabitants)

88 Km E of Viterbo (67173 inhabitants)

89 Km NE of Guidonia Montecelio (88673 inhabitants)

92 Km N of Tivoli (56533 inhabitants)

92 Km W of Montesilvano (53738 inhabitants)

99 Km W of Pescara (121014 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
Reviewed Rev100	ML 0.8	2021-12-10 09:47:17	42.7623	13.0728	10	2021-12-10 11:03:49	Sala Sismica INGV-Roma	98375931

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2021-12-10 09:47:17 ± 0.11
Latitude	42.7623 ± 0.0045
Longitude	13.0728 ± 0.0110
Depth (km)	10 ± 1 (from location)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	100 -> SURVEY-INGV
Event type	earthquake
Origin ID	98375931

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	954
Semi-minor axis of confidence ellipse (meter)	245
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	116
Circular confidence region, given by single value of horizontal uncertainty (meter)	950.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	159
Number of associated phases, regardless of their use for origin computation	36
Number of defining phases	10
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.19
Epicentral distance of station closest to the epicenter (degree)	0.00000
Epicentral distance of station farthest from the epicenter (degree)	0.27160
Number of stations at which the event was observed	30
Number of stations from which data was used for origin computation	5

Magnitude information

ML:0.8

Field	Value
Value	0.8
Uncertainty	0.2
Num. used stations	10
Type of magnitude	ML
Reference to an origin	98375931
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2021-12-10 11:03:49

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Takeoff_angle	Residual	Weight
IV.HAGA.HHZ.	2021-12-10T09:48:40.27	3.0	negative	manual	Pg				19.959999	0
IV.MCRV.HHZ.	2021-12-10T09:48:19.48	3.0	undecidable	manual	Sn				-1.91	0
IX.CMP3.EHZ.02	2021-12-10T09:48:18.12	3.0	undecidable	manual	Sn				-4.82	0
CR.ZAG.BHZ.	2021-12-10T09:48:17.46	3.0	undecidable	manual	Sn				-0.49	0
IV.MTGR.HHZ.	2021-12-10T09:48:09.66	3.0	positive	manual	Pn				3.13	0
IV.MILZ.HHZ.	2021-12-10T09:48:08.83	3.0	negative	manual	Pn				0.75	0
IV.FREG.EHZ.	2021-12-10T09:48:03.06	3.0	undecidable	manual	Sg				13.21	0
IX.RSF3.HHZ.02	2021-12-10T09:47:53.31	3.0	positive	manual	Pg				16.99	0
IV.SCHR.EHZ.	2021-12-10T09:47:49.91	3.0	undecidable	manual	Pn				-0.28	0
MN.TRI.HHZ.	2021-12-10T09:47:48.06	3.0	undecidable	manual	Sn				-2.45	0
CR.ZAG.BHZ.	2021-12-10T09:47:45.10	3.0	undecidable	manual	Pn				8.86	0
GU.CIRO.HHZ.	2021-12-10T09:47:37.82	3.0	positive	manual	Pn				-1.01	0
SL.LJU.BHZ.	2021-12-10T09:47:31.57	3.0	negative	manual	Pn				3.1	0
OT.OT17.EHZ.	2021-12-10T09:47:29.29	3.0	positive	manual	Pn				-1.53	0
CH.MUGIO.HHZ.	2021-12-10T09:47:28.35	3.0	undecidable	manual	Pn				-2.06	0
IV.CESI.HHZ.	2021-12-10T09:47:27.71	0.3	undecidable	manual	S	333	30.1476	50	-0.08	72
IV.MC2.EHZ.	2021-12-10T09:47:24.72	0.3	undecidable	manual	S	30	19.0698	118	0.25	71
IV.GAVE.EHZ.	2021-12-10T09:47:23.70	0.6	undecidable	manual	S	242	16.4724	121	0	50
IV.LNSS.HNE.	2021-12-10T09:47:23.86	0.3	undecidable	manual	S	189	17.871	119	-0.26	71
IV.CESI.HHZ.	2021-12-10T09:47:23.18	0.1	undecidable	manual	P	333	30.1476	50	-0.06	97
IV.NRCA.HHZ.	2021-12-10T09:47:21.28	0.3	undecidable	manual	S	23	8.5803	139	-0.29	72
IV.MC2.EHZ.	2021-12-10T09:47:21.23	0.6	undecidable	manual	P	30	19.0698	118	-0.09	49
IV.GAVE.EHZ.	2021-12-10T09:47:21.04	0.1	undecidable	manual	P	242	16.4724	121	0.16	97
IV.LNSS.HNE.	2021-12-10T09:47:21.27	0.1	undecidable	manual	P	189	17.871	119	0.15	97
IV.NRCA.HHZ.	2021-12-10T09:47:19.72	0.1	undecidable	manual	P	23	8.5803	139	0.07	100
IV.BAG8.EHZ.	2021-12-10T09:47:18.02	3.0	undecidable	manual	Pn				-3.46	0
IV.VIVA.HHZ.	2021-12-10T09:47:18.19	3.0	undecidable	manual	Pn				2.67	0
IV.SBPO.HNZ.	2021-12-10T09:47:17.45	3.0	negative	manual	Pg				6.58	0
IV.MSSA.HHZ.	2021-12-10T09:47:17.40	3.0	undecidable	manual	Pg				2.39	0
IV.IMOL.HNZ.	2021-12-10T09:47:11.26	3.0	undecidable	manual	Sn				-4.29	0
IV.BDI.HHZ.	2021-12-10T09:47:02.15	3.0	undecidable	manual	P				-2.99	0
IV.CRTC.HHZ.	2021-12-10T09:47:01.41	3.0	positive	manual	Pn				1.23	0
IV.BRSN.EHZ.	2021-12-10T09:47:00.89	3.0	positive	manual	Pg				0.64	0
GU.POPM.HHZ.	2021-12-10T09:47:00.11	3.0	positive	manual	Pn				-3.79	0
IV.PE3.EHZ.	2021-12-10T09:46:57.73	3.0	positive	manual	P				-0.55	0
IV.SFI.EHZ.	2021-12-10T09:46:55.24	3.0	negative	manual	P				-2.84	0

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.NRCA.HHN.	ML:1.0	0.000133	0.12	AML	other	m	2021-12-10T09:47:21.51
IV.NRCA.HHE.	ML:1.0	0.0001295	0.72	AML	other	m	2021-12-10T09:47:21.44
IV.NRCA.HNE.	ML:1.0	0.000124471145	0.0704	AML	other	m	2021-12-10T09:47:21.54
IV.NRCA.HNN.	ML:0.8	0.00009430677000000001	0.0704	AML	other	m	2021-12-10T09:47:21.32
IV.GAVE.EHE.	ML:0.8	0.0000494044785	0.1344	AML	other	m	2021-12-10T09:47:24.53
IV.GAVE.EHN.	ML:0.6	0.0000348268	0.1152	AML	other	m	2021-12-10T09:47:24.39
IV.MC2.EHE.	ML:0.6	0.00003317609999999999	0.1792	AML	other	m	2021-12-10T09:47:26.02
IV.MC2.EHN.	ML:0.7	0.00003758529999999999	0.1792	AML	other	m	2021-12-10T09:47:25.82
IV.CESI.HHE.	ML:0.5	0.0000166040195	0.1216	AML	other	m	2021-12-10T09:47:28.34
IV.CESI.HHN.	ML:0.6	0.000018515684	0.1152	AML	other	m	2021-12-10T09:47:28.60

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 with magnitude of ML 0.8 on date 10-12-2021 and time 10:47:17 (Italy) in region 4 km SW Norcia (PG)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

ML:0.8