Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-02-2023 and time 14:44:37 (UTC) in region 1 km S Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 1 km S Norcia (PG), on

  • 28-02-2023 14:44:37 (UTC)
  • 28-02-2023 15:44:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7860, 13.0960 at 11 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 10 3217 8174
Preci PG 11 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Cerreto di Spoleto PG 15 1075 10254
Poggiodomo PG 15 117 10371
Accumoli RI 16 667 11038
Visso MC 16 1107 12145
Arquata del Tronto AP 17 1178 13323
Sellano PG 18 1079 14402
Ussita MC 18 444 14846
Monteleone di Spoleto PG 19 599 15445
Vallo di Nera PG 19 364 15809
Cittareale RI 19 482 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km SW of Ancona (100861 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 1.6 2023-02-28
14:44:37		 42.7857 13.0957 11 2024-03-01
17:17:58		 Bollettino Sismico Italiano INGV 115140901
Reviewed
Rev100 		ML 1.6 2023-02-28
14:44:37		 42.7843 13.0942 10 2023-02-28
14:57:00		 Sala Sismica INGV-Roma 114885591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-28 14:44:37 ± 0.05
Latitude 42.7857 ± 0.0018
Longitude 13.0957 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 115140901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 256
Semi-minor axis of confidence ellipse (meter) 141
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 77
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 55
Number of defining phases 54
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) 0.59445
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 34
Type of magnitude ML
Reference to an origin 114885591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-28 14:57:00

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 38
Type of magnitude ML
Reference to an origin 115140901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-03-09 09:38:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2023-02-28T14:44:56.62 0.6 undecidable manual S 0 60.2952 50 0.5 41
IV.SACS.HHZ. 2023-02-28T14:44:56.82 3.0 positive manual P 3.03 0
IV.FIAM.HHZ. 2023-02-28T14:44:55.91 0.6 undecidable manual S 178 57.3981 50 0.55 41
IV.GIGS.HHZ. 2023-02-28T14:44:54.08 0.6 undecidable manual S 133 53.6019 50 -0.26 44
IV.SNTG.HHZ. 2023-02-28T14:44:54.58 0.6 undecidable manual S 346 53.6019 50 0.26 44
IV.TERO.HHZ. 2023-02-28T14:44:52.28 0.6 undecidable manual S 113 45.2214 50 0.19 45
IV.MOMA.HHZ. 2023-02-28T14:44:51.88 0.6 undecidable manual S 273 42.8238 50 0.43 43
IV.MF5.EHZ. 2023-02-28T14:44:50.56 0.3 undecidable manual S 53 37.1295 50 0.62 61
IV.PF6.EHN. 2023-02-28T14:44:50.58 0.3 undecidable manual S 12 39.9267 50 -0.09 70
IV.MML1.EHZ. 2023-02-28T14:44:50.09 0.6 undecidable manual S 345 37.7289 50 0 47
IV.GUMA.HHZ. 2023-02-28T14:44:50.58 0.6 undecidable manual S 32 36.3414 50 0.85 37
IV.CING.HHZ. 2023-02-28T14:44:49.19 0.3 undecidable manual P 7 65.9895 50 0.06 67
IV.CSP1.EHZ. 2023-02-28T14:44:49.37 0.6 undecidable manual S 15 35.1426 50 -0.02 48
IV.EL6.EHZ. 2023-02-28T14:44:48.06 0.3 undecidable manual P 0 60.2952 50 -0.2 66
IV.RM33.HNE. 2023-02-28T14:44:48.41 0.3 undecidable manual S 162 32.1456 50 -0.2 69
IV.FDMO.HHZ. 2023-02-28T14:44:47.37 0.6 undecidable manual S 359 27.8499 50 -0.08 48
IV.SNTG.HHZ. 2023-02-28T14:44:47.10 0.3 undecidable manual P 346 53.6019 50 -0.12 68
IV.CESI.HHZ. 2023-02-28T14:44:47.66 0.3 undecidable manual S 328 28.8489 50 -0.06 71
IV.GIGS.HHZ. 2023-02-28T14:44:47.25 0.3 undecidable manual P 133 53.6019 50 0.02 69
IV.SMA1.EHZ. 2023-02-28T14:44:47.48 0.6 undecidable manual S 131 26.0517 50 0.51 44
IV.FIAM.HHZ. 2023-02-28T14:44:47.65 0.3 undecidable manual P 178 57.3981 50 -0.17 66
IV.MTRA.HNZ. 2023-02-28T14:44:46.43 0.3 undecidable manual S 97 24.753 50 -0.19 70
IV.MMO1.EHZ. 2023-02-28T14:44:46.12 0.6 undecidable manual S 56 22.6551 50 0.05 48
IT.MTCL.HGZ. 2023-02-28T14:44:46.25 0.1 undecidable manual S 341 24.3534 50 -0.28 92
7F.SIB1.EHZ. 2023-02-28T14:44:45.02 0.1 undecidable manual S 49 18.6702 50 0.02 98
IV.GAVE.EHZ. 2023-02-28T14:44:45.28 0.6 undecidable manual S 238 19.3695 50 0.08 48
7F.SIB2.EHZ. 2023-02-28T14:44:45.31 0.3 undecidable manual S 55 20.5683 50 -0.21 70
IV.LNSS.HHZ. 2023-02-28T14:44:45.56 0.6 undecidable manual S 193 20.7681 50 -0.01 49
IV.MF5.EHZ. 2023-02-28T14:44:45.00 0.3 undecidable manual P 53 37.1295 50 0.31 67
IV.FEMA.HNZ. 2023-02-28T14:44:45.07 0.1 undecidable manual S 349 19.9689 50 -0.27 93
IV.TERO.HHZ. 2023-02-28T14:44:45.90 0.3 undecidable manual P 113 45.2214 50 -0.04 70
IV.PF6.EHN. 2023-02-28T14:44:45.00 0.1 undecidable manual P 12 39.9267 50 -0.11 93
IV.MOMA.HHZ. 2023-02-28T14:44:45.77 0.3 undecidable manual P 273 42.8238 50 0.2 68
IV.CSP1.EHZ. 2023-02-28T14:44:44.32 0.1 undecidable manual P 15 35.1426 50 -0.06 94
IV.GUMA.HHZ. 2023-02-28T14:44:44.87 0.1 undecidable manual P 32 36.3414 50 0.3 90
7F.SIB3.EHZ. 2023-02-28T14:44:44.37 0.1 undecidable manual S 55 17.2716 122 -0.25 94
IV.CAMP.HHZ. 2023-02-28T14:44:44.55 0.3 undecidable manual P 137 37.7289 50 -0.23 68
IV.MC2.EHZ. 2023-02-28T14:44:44.48 0.6 undecidable manual S 29 15.873 124 0.27 47
IV.MML1.EHZ. 2023-02-28T14:44:44.65 0.1 undecidable manual P 345 37.7289 50 -0.13 93
IV.RM33.HNE. 2023-02-28T14:44:43.78 0.1 undecidable manual P 162 32.1456 50 -0.15 93
IV.FDMO.HHZ. 2023-02-28T14:44:43.18 0.1 undecidable manual P 359 27.8499 50 -0.08 95
IV.CESI.HHZ. 2023-02-28T14:44:43.32 0.1 undecidable manual P 328 28.8489 50 -0.09 95
IV.MMO1.EHZ. 2023-02-28T14:44:42.36 0.1 undecidable manual P 56 22.6551 50 -0.1 96
IT.MTCL.HGZ. 2023-02-28T14:44:42.62 0.1 undecidable manual P 341 24.3534 50 -0.1 95
IV.SMA1.EHZ. 2023-02-28T14:44:42.96 0.1 undecidable manual P 131 26.0517 50 -0.02 97
IV.MTRA.HNZ. 2023-02-28T14:44:42.48 0.3 undecidable manual P 97 24.753 50 -0.29 69
IV.GAVE.EHZ. 2023-02-28T14:44:42.01 0.1 undecidable manual P 238 19.3695 50 0.05 97
7F.SIB2.EHZ. 2023-02-28T14:44:42.02 0.1 negative manual P 55 20.5683 50 -0.12 96
IV.LNSS.HHZ. 2023-02-28T14:44:42.21 0.1 positive manual P 193 20.7681 50 0.04 97
IV.FEMA.HNZ. 2023-02-28T14:44:42.07 0.1 undecidable manual P 349 19.9689 50 0.03 98
IV.MC2.EHZ. 2023-02-28T14:44:41.59 0.1 negative manual P 29 15.873 124 0.21 95
7F.SIB1.EHZ. 2023-02-28T14:44:41.90 0.1 negative manual P 49 18.6702 50 0.06 97
7F.SIB3.EHZ. 2023-02-28T14:44:41.57 0.1 negative manual P 55 17.2716 122 -0.05 97
IV.NRCA.HHZ. 2023-02-28T14:44:41.74 0.1 undecidable manual S 16 5.4945 153 -0.02 100
IV.NRCA.HHZ. 2023-02-28T14:44:40.19 0.1 negative manual P 16 5.4945 153 0.22 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MC2.EHN. ML:1.8 0.0005989999999999999 0.24 AML other m 2023-02-28T14:44:45.66
IV.GAVE.EHN. ML:1.7 0.000348 0.2 AML other m 2023-02-28T14:44:45.77
IV.MC2.EHE. ML:1.8 0.000623 0.38 AML other m 2023-02-28T14:44:45.59
IV.LNSS.HNE. ML:2.0 0.0006725 0.2 AML other m 2023-02-28T14:44:45.90
IV.LNSS.HHN. ML:2.0 0.0006770000000000001 0.24 AML other m 2023-02-28T14:44:46.23
IV.LNSS.HNN. ML:2.0 0.0006575 0.24 AML other m 2023-02-28T14:44:46.23
IV.GAVE.EHE. ML:1.9 0.000565 0.96 AML other m 2023-02-28T14:44:46.37
IV.MMO1.EHN. ML:1.6 0.00027600000000000004 0.18 AML other m 2023-02-28T14:44:46.41
IV.MMO1.EHE. ML:1.6 0.00023050000000000002 0.28 AML other m 2023-02-28T14:44:46.57
IV.LNSS.HHE. ML:2.0 0.0007564999999999999 0.82 AML other m 2023-02-28T14:44:46.90
IV.FDMO.HHN. ML:1.5 0.00016299999999999998 0.24 AML other m 2023-02-28T14:44:47.50
IV.FDMO.HHE. ML:1.5 0.000169 0.26 AML other m 2023-02-28T14:44:47.67
IV.CESI.HHN. ML:1.8 0.0002805 0.36 AML other m 2023-02-28T14:44:48.00
IV.SMA1.EHE. ML:1.5 0.00018449999999999999 1.26 AML other m 2023-02-28T14:44:48.34
IV.SMA1.EHN. ML:1.5 0.00017449999999999999 0.9 AML other m 2023-02-28T14:44:48.96
IV.CESI.HHE. ML:1.4 0.0001325 0.26 AML other m 2023-02-28T14:44:48.67
IV.CSP1.EHE. ML:2.1 0.0004765 0.38 AML other m 2023-02-28T14:44:50.35
IV.MML1.EHN. ML:1.4 0.00009035 0.16 AML other m 2023-02-28T14:44:50.62
IV.CSP1.EHN. ML:2.1 0.00047299999999999995 0.42 AML other m 2023-02-28T14:44:51.65
IV.MF5.EHE. ML:1.5 0.00012277178 0.2048 AML other m 2023-02-28T14:44:51.60
IV.MF5.EHN. ML:1.7 0.0001859883 0.2208 AML other m 2023-02-28T14:44:51.61
IV.MML1.EHE. ML:1.5 0.00010575 0.76 AML other m 2023-02-28T14:44:51.36
IV.GUMA.HHE. ML:1.8 0.000264 0.46 AML other m 2023-02-28T14:44:51.55
IV.GUMA.HHN. ML:1.8 0.0002485 1.54 AML other m 2023-02-28T14:44:51.85
IV.GUMA.HNE. ML:1.8 0.000215783445 0.2816 AML other m 2023-02-28T14:44:52.55
IV.MOMA.HHN. ML:1.2 0.000047350000000000006 1.18 AML other m 2023-02-28T14:44:53.31
IV.MOMA.HHE. ML:1.8 0.0001995 0.64 AML other m 2023-02-28T14:44:53.02
IV.GIGS.HHE. ML:1.1 0.00002853257 0.096 AML other m 2023-02-28T14:44:53.52
IV.GIGS.HHN. ML:1.3 0.00004465856 0.7808 AML other m 2023-02-28T14:44:53.27
IV.TERO.HHN. ML:1.5 0.00008285000000000001 0.6 AML other m 2023-02-28T14:44:54.31
IV.TERO.HHE. ML:1.3 0.000063 0.64 AML other m 2023-02-28T14:44:54.54
IV.GUMA.HNN. ML:1.8 0.00023122955 0.608 AML other m 2023-02-28T14:44:55.42
IV.SNTG.HHE. ML:1.4 0.0000595220337 0.1216 AML other m 2023-02-28T14:44:55.79
IV.SNTG.HHN. ML:1.3 0.00004320355 0.1216 AML other m 2023-02-28T14:44:56.62
IV.FIAM.HHN. ML:1.4 0.000048372975 0.1792 AML other m 2023-02-28T14:44:56.92
IV.FIAM.HHE. ML:1.4 0.00005339955499999999 0.3392 AML other m 2023-02-28T14:44:57.70
IV.CING.HHE. ML:1.6 0.00007116878000000001 1.76 AML other m 2023-02-28T14:45:01.03
IV.CING.HHN. ML:1.4 0.000042355144499999995 0.1408 AML other m 2023-02-28T14:45:01.10
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