Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 28-12-2022 and time 12:32:21 (Italy) in region 1 km SE Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 1 km SE Norcia (PG), on

  • 28-12-2022 11:32:21 (UTC)
  • 28-12-2022 12:32:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7860, 13.1060 at 10 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
Norcia PG 1 4957 4957
Cascia PG 11 3217 8174
Preci PG 12 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Accumoli RI 15 667 9846
Arquata del Tronto AP 16 1178 11024
Cerreto di Spoleto PG 16 1075 12099
Poggiodomo PG 16 117 12216
Visso MC 16 1107 13323
Ussita MC 18 444 13767
Sellano PG 19 1079 14846
Cittareale RI 19 482 15328
Monteleone di Spoleto PG 20 599 15927
Montegallo AP 20 523 16450
Vallo di Nera PG 20 364 16814

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
100 Km W of Chieti (51815 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 0.9 2022-12-28
11:32:21		 42.786 13.1062 10 2024-03-01
15:28:15		 Bollettino Sismico Italiano INGV 113622561
Reviewed
Rev100 		ML 1.5 2022-12-28
11:32:21		 42.7828 13.1118 10 2022-12-28
11:39:17		 Sala Sismica INGV-Roma 113138241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-12-28 11:32:21 ± 0.05
Latitude 42.7860 ± 0.0027
Longitude 13.1062 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 113622561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 425
Semi-minor axis of confidence ellipse (meter) 141
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 110
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31386
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 113138241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-12-28 11:39:17

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 113622561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-01-17 12:54:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2022-12-28T11:32:33.77 0.3 undecidable manual S 13 34.8429 50 0.02 73
IV.CESI.HHZ. 2022-12-28T11:32:32.21 0.3 undecidable manual S 326 29.2485 50 -0.05 73
IV.RM33.EHZ. 2022-12-28T11:32:32.80 0.3 undecidable manual S 164 31.9458 50 -0.18 71
IV.FDMO.HHZ. 2022-12-28T11:32:31.52 0.3 undecidable manual S 357 27.8499 50 -0.35 69
IV.SMA1.EHZ. 2022-12-28T11:32:31.78 0.3 undecidable manual S 133 25.4523 50 0.55 66
IV.TERO.HHZ. 2022-12-28T11:32:30.02 3.0 undecidable manual P -0.17 0
7F.SIB2.EHE. 2022-12-28T11:32:29.25 0.1 undecidable manual S 54 19.869 117 -0.25 95
IV.LNSS.HHZ. 2022-12-28T11:32:29.58 0.1 undecidable manual S 195 20.9679 116 -0.27 94
IV.GAVE.EHN. 2022-12-28T11:32:29.69 0.3 undecidable manual S 239 20.1687 117 0.1 73
IV.RM33.EHZ. 2022-12-28T11:32:28.04 0.3 undecidable manual P 164 31.9458 50 -0.2 70
IV.CSP1.EHZ. 2022-12-28T11:32:28.73 0.1 undecidable manual P 13 34.8429 50 0.05 96
7F.SIB3.EHE. 2022-12-28T11:32:28.22 0.3 undecidable manual S 53 16.5723 121 -0.28 71
IV.MC2.EHZ. 2022-12-28T11:32:28.58 0.3 undecidable manual S 26 15.4734 123 0.41 69
7F.SIB1.EHE. 2022-12-28T11:32:28.88 0.3 undecidable manual S 48 17.9709 119 -0.04 75
IV.SMA1.EHZ. 2022-12-28T11:32:27.16 0.3 undecidable manual P 133 25.4523 50 -0.07 73
IV.FDMO.HHZ. 2022-12-28T11:32:27.59 0.1 undecidable manual P 357 27.8499 50 -0.01 98
IV.CESI.HHZ. 2022-12-28T11:32:27.80 0.1 undecidable manual P 326 29.2485 50 -0.03 98
IV.GAVE.EHN. 2022-12-28T11:32:26.60 0.6 undecidable manual P 239 20.1687 117 0.32 47
7F.SIB1.EHE. 2022-12-28T11:32:26.03 0.1 undecidable manual P 48 17.9709 119 0.14 98
7F.SIB2.EHE. 2022-12-28T11:32:26.20 0.1 undecidable manual P 54 19.869 117 -0.03 99
IV.LNSS.HHZ. 2022-12-28T11:32:26.48 0.1 undecidable manual P 195 20.9679 116 0.05 99
IV.MC2.EHZ. 2022-12-28T11:32:25.80 0.1 undecidable manual P 26 15.4734 123 0.34 94
IV.NRCA.HHZ. 2022-12-28T11:32:25.48 0.1 undecidable manual S 7 5.2947 152 -0.24 98
7F.SIB3.EHE. 2022-12-28T11:32:25.68 0.1 undecidable manual P 53 16.5723 121 0.02 100
IV.NRCA.HHZ. 2022-12-28T11:32:24.20 0.1 undecidable manual P 7 5.2947 152 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.0 0.00006395 0.12 AML other m 2022-12-28T11:32:30.51
IV.LNSS.HHE. ML:1.1 0.00008 0.14 AML other m 2022-12-28T11:32:30.61
IV.MC2.EHN. ML:1.0 0.00009178009000000001 0.1984 AML other m 2022-12-28T11:32:29.93
IV.MC2.EHE. ML:1.0 0.00009842520000000001 0.2816 AML other m 2022-12-28T11:32:29.91
IV.SMA1.EHN. ML:0.8 0.00003548273000000001 0.1984 AML other m 2022-12-28T11:32:32.04
IV.SMA1.EHE. ML:0.9 0.000042569054999999996 0.3392 AML other m 2022-12-28T11:32:31.95
IV.FDMO.HHN. ML:0.7 0.000024960144999999998 0.1792 AML other m 2022-12-28T11:32:32.43
IV.FDMO.HHE. ML:0.6 0.000019509035 0.2368 AML other m 2022-12-28T11:32:33.09
IV.RM33.EHE. ML:0.6 0.000021969530000000002 0.1216 AML other m 2022-12-28T11:32:33.35
IV.RM33.EHN. ML:0.9 0.000036306445 0.1216 AML other m 2022-12-28T11:32:33.20
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