Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 31-05-2023 and time 10:07:42 (UTC) in region 3 km E Norcia (PG)

A magnitude ML 1.9 earthquake occured in region: 3 km E Norcia (PG), on

  • 31-05-2023 10:07:42 (UTC)
  • 31-05-2023 12:07:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8010, 13.1350 at 8 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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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 4 4957 4957
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 12 724 5962
Cascia PG 13 3217 9179
Arquata del Tronto AP 14 1178 10357
Accumoli RI 15 667 11024
Visso MC 15 1107 12131
Ussita MC 16 444 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Poggiodomo PG 19 117 14290
Montemonaco AP 19 604 14894
Sellano PG 20 1079 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km NW 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
Reviewed
Rev100 		ML 1.9 2023-05-31
10:07:42		 42.8013 13.1348 8 2023-05-31
10:13:14		 Sala Sismica INGV-Roma 117906751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-31 10:07:42 ± 0.05
Latitude 42.8013 ± 0.0027
Longitude 13.1348 ± 0.0049
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117906751

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 293
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 65
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 63
Number of defining phases 59
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.84087
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 31
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 60
Type of magnitude ML
Reference to an origin 117906751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-31 10:13:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2023-05-31T10:08:31.57 3.0 undecidable manual Sn 1.52 0
IV.VVLD.HHZ. 2023-05-31T10:08:15.62 3.0 undecidable manual S -1.36 0
IV.GATE.HHZ. 2023-05-31T10:08:12.28 3.0 positive manual Pn -0.94 0
IV.T0110.HHZ. 2023-05-31T10:08:07.98 0.3 undecidable manual S 140 82.3509 50 0.87 53
IV.ARVD.HHZ. 2023-05-31T10:08:06.67 0.3 undecidable manual S 349 78.8655 50 0.48 62
IV.SSFR.HHZ. 2023-05-31T10:08:06.33 0.6 undecidable manual S 338 75.9684 50 0.9 35
IV.MURB.HHZ. 2023-05-31T10:08:05.06 0.3 undecidable manual S 316 71.1732 50 0.91 53
IV.CING.HHZ. 2023-05-31T10:08:02.66 0.6 undecidable manual S 4 63.8916 50 0.46 43
IV.ATCC.EHZ. 2023-05-31T10:08:01.33 0.6 undecidable manual S 317 58.497 50 0.56 42
IV.VVLD.HHZ. 2023-05-31T10:08:01.76 3.0 positive manual P 0.15 0
IV.EL6.EHZ. 2023-05-31T10:08:01.40 0.6 undecidable manual S 357 58.5969 50 0.6 41
IV.FIAM.HHZ. 2023-05-31T10:08:00.85 1.0 undecidable manual S 181 59.1963 50 -0.08 23
IV.ATPI.EHZ. 2023-05-31T10:07:58.21 1.0 undecidable manual P 321 93.3399 50 0.01 22
IV.CESX.HHZ. 2023-05-31T10:07:58.63 0.3 undecidable manual S 245 49.5171 50 0.27 69
IV.GIGS.HHZ. 2023-05-31T10:07:58.68 0.3 undecidable manual S 137 52.6029 50 -0.51 65
IV.MOMA.HHZ. 2023-05-31T10:07:57.83 0.6 undecidable manual S 271 45.9207 50 0.42 45
IV.MGAB.HHZ. 2023-05-31T10:07:57.51 0.6 undecidable manual P 279 84.0492 50 0.73 37
IV.ASSB.HHZ. 2023-05-31T10:07:57.39 0.6 undecidable manual S 305 47.0196 50 -0.31 46
IV.T0110.HHZ. 2023-05-31T10:07:56.64 0.6 undecidable manual P 140 82.3509 50 0.14 45
IV.TERO.HHZ. 2023-05-31T10:07:56.36 0.6 undecidable manual S 117 43.0236 50 -0.28 47
IV.ARRO.EHZ. 2023-05-31T10:07:55.46 0.6 undecidable manual S 231 38.9277 50 -0.06 49
IV.ARVD.HHZ. 2023-05-31T10:07:55.61 0.6 positive manual P 349 78.8655 50 -0.37 43
IV.SSFR.HHZ. 2023-05-31T10:07:55.69 0.6 negative manual P 338 75.9684 50 0.16 45
IV.GUMA.HHZ. 2023-05-31T10:07:54.34 0.6 undecidable manual S 29 33.2445 104 0.45 46
IV.MML1.EHZ. 2023-05-31T10:07:54.66 0.6 undecidable manual S 339 37.0296 50 -0.38 46
IV.MURB.HHZ. 2023-05-31T10:07:54.83 0.1 undecidable manual P 316 71.1732 50 0.03 93
IV.RM33.EHZ. 2023-05-31T10:07:54.06 0.6 undecidable manual S 169 33.0447 104 0.23 48
IV.CING.HHZ. 2023-05-31T10:07:53.75 0.3 positive manual P 4 63.8916 50 0.08 70
IV.CSP1.EHZ. 2023-05-31T10:07:53.37 0.6 undecidable manual S 10 32.745 104 -0.34 47
IV.EL6.EHZ. 2023-05-31T10:07:52.70 0.6 negative manual P 357 58.5969 50 -0.16 46
IV.CESI.HHZ. 2023-05-31T10:07:52.36 0.3 undecidable manual S 320 29.3484 105 -0.21 72
IV.ATCC.EHZ. 2023-05-31T10:07:52.61 0.1 negative manual P 317 58.497 50 -0.23 91
IV.FIAM.HHZ. 2023-05-31T10:07:52.67 0.6 positive manual P 181 59.1963 50 -0.27 45
IV.GIGS.HHZ. 2023-05-31T10:07:51.35 0.1 undecidable manual P 137 52.6029 50 -0.58 84
IV.FDMO.HHZ. 2023-05-31T10:07:51.16 1.0 undecidable manual S 352 26.3514 107 -0.43 23
IV.CESX.HHZ. 2023-05-31T10:07:51.19 1.0 negative manual P 245 49.5171 50 -0.26 23
IV.ASSB.HHZ. 2023-05-31T10:07:50.55 0.1 undecidable manual P 305 47.0196 50 -0.52 87
IV.LNSS.HHZ. 2023-05-31T10:07:50.85 0.3 undecidable manual S 199 23.3544 109 0.27 72
IV.MOMA.HHZ. 2023-05-31T10:07:50.58 0.1 positive manual P 271 45.9207 50 -0.33 92
IV.MTRA.EHZ. 2023-05-31T10:07:50.59 0.6 undecidable manual S 103 21.867 110 0.48 46
IT.MTCL.HGZ. 2023-05-31T10:07:50.40 0.3 undecidable manual S 333 24.0537 109 -0.41 70
IV.TERO.HHZ. 2023-05-31T10:07:50.09 0.1 undecidable manual P 117 43.0236 50 -0.37 91
IV.GAVE.EHZ. 2023-05-31T10:07:50.68 0.6 undecidable manual S 238 23.0547 109 0.2 49
IV.CAMP.HHZ. 2023-05-31T10:07:49.19 0.1 negative manual P 143 36.9297 50 -0.33 93
IV.FEMA.HNZ. 2023-05-31T10:07:49.20 0.6 undecidable manual S 339 19.1697 113 -0.02 51
IV.MMO1.EHZ. 2023-05-31T10:07:49.33 0.6 undecidable manual S 55 19.0698 113 0.14 50
IV.ARRO.EHZ. 2023-05-31T10:07:49.58 0.6 negative manual P 231 38.9277 50 -0.24 47
IV.MML1.EHZ. 2023-05-31T10:07:49.04 0.6 positive manual P 339 37.0296 50 -0.5 45
IV.CSP1.EHZ. 2023-05-31T10:07:48.49 0.1 positive manual P 10 32.745 104 -0.28 95
7F.SIB2.EHZ. 2023-05-31T10:07:48.69 0.6 undecidable manual S 54 16.9719 115 0.15 50
IV.RM33.EHZ. 2023-05-31T10:07:48.70 0.6 negative manual P 169 33.0447 104 -0.14 49
IV.GUMA.HHZ. 2023-05-31T10:07:48.78 0.6 positive manual P 29 33.2445 104 -0.09 49
IV.GAVE.EHZ. 2023-05-31T10:07:47.03 0.1 positive manual P 238 23.0547 109 0.13 99
IV.LNSS.HHZ. 2023-05-31T10:07:47.08 0.1 positive manual P 199 23.3544 109 0.12 100
IV.FDMO.HHZ. 2023-05-31T10:07:47.25 0.1 undecidable manual P 352 26.3514 107 -0.29 95
IV.CESI.HHZ. 2023-05-31T10:07:47.90 0.1 positive manual P 320 29.3484 105 -0.21 97
IV.MTRA.EHZ. 2023-05-31T10:07:46.88 0.1 negative manual P 103 21.867 110 0.19 98
IT.MTCL.HGZ. 2023-05-31T10:07:46.90 0.1 undecidable manual P 333 24.0537 109 -0.2 98
IV.FEMA.HNZ. 2023-05-31T10:07:46.40 0.1 undecidable manual P 339 19.1697 113 0.22 98
IV.MMO1.EHZ. 2023-05-31T10:07:46.29 0.1 positive manual P 55 19.0698 113 0.13 100
7F.SIB2.EHZ. 2023-05-31T10:07:45.95 0.1 undecidable manual P 54 16.9719 115 0.17 100
IV.NRCA.HHZ. 2023-05-31T10:07:44.94 0.6 undecidable manual S 335 3.996 154 -0.19 51
IV.NRCA.HHZ. 2023-05-31T10:07:44.28 0.1 undecidable manual P 335 3.996 154 0.47 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMO1.EHE. ML:2.5 0.00242 0.2 AML other m 2023-05-31T10:07:49.50
IV.MTRA.EHE. ML:2.2 0.00103 0.7 AML other m 2023-05-31T10:07:50.51
IV.MTRA.HNE. ML:2.2 0.0009985 0.7 AML other m 2023-05-31T10:07:50.51
IV.MMO1.EHN. ML:2.3 0.0017850000000000001 0.72 AML other m 2023-05-31T10:07:50.18
IV.LNSS.HHN. ML:2.5 0.00221 0.24 AML other m 2023-05-31T10:07:51.36
IV.GAVE.EHE. ML:2.4 0.0015899999999999998 0.66 AML other m 2023-05-31T10:07:51.37
IV.MTRA.HNN. ML:2.2 0.00128 0.64 AML other m 2023-05-31T10:07:51.80
IV.MTRA.EHN. ML:2.3 0.001325 0.64 AML other m 2023-05-31T10:07:51.80
IV.LNSS.HHE. ML:2.3 0.00121 1 AML other m 2023-05-31T10:07:51.14
IV.GAVE.HNE. ML:2.3 0.001385 1.44 AML other m 2023-05-31T10:07:51.76
IV.GAVE.HNN. ML:1.8 0.0004115 1.74 AML other m 2023-05-31T10:07:52.03
IV.GAVE.EHN. ML:2.3 0.001265 0.2 AML other m 2023-05-31T10:07:52.13
IV.FDMO.HHE. ML:1.8 0.0003635 1.68 AML other m 2023-05-31T10:07:52.89
IV.CESI.HHE. ML:2.2 0.000749 0.44 AML other m 2023-05-31T10:07:52.68
IV.CESI.HHN. ML:2.2 0.0008025 0.38 AML other m 2023-05-31T10:07:52.87
IV.FDMO.HHN. ML:1.8 0.0003505 0.34 AML other m 2023-05-31T10:07:53.45
IV.CSP1.EHN. ML:2.2 0.000661 0.78 AML other m 2023-05-31T10:07:53.71
IV.CSP1.EHE. ML:2.1 0.0005880000000000001 0.16 AML other m 2023-05-31T10:07:54.21
IV.GUMA.HNE. ML:2.4 0.00124 0.32 AML other m 2023-05-31T10:07:54.78
IV.GUMA.HHE. ML:2.5 0.0014449999999999999 0.3 AML other m 2023-05-31T10:07:54.63
IV.RM33.EHN. ML:1.8 0.000266 0.54 AML other m 2023-05-31T10:07:54.38
IV.MML1.EHN. ML:1.9 0.000332 0.18 AML other m 2023-05-31T10:07:54.86
IV.MML1.EHE. ML:1.9 0.000311 0.62 AML other m 2023-05-31T10:07:55.04
IV.GUMA.HHN. ML:2.4 0.001245 0.22 AML other m 2023-05-31T10:07:55.21
IV.CAMP.HHE. ML:1.7 0.0001735 0.78 AML other m 2023-05-31T10:07:55.67
IV.RM33.EHE. ML:1.8 0.00028500000000000004 0.12 AML other m 2023-05-31T10:07:55.63
IV.ARRO.EHE. ML:1.8 0.00020950000000000002 1.1 AML other m 2023-05-31T10:07:56.68
IV.TERO.HHN. ML:2.0 0.000319 0.2 AML other m 2023-05-31T10:07:57.43
IV.TERO.HHE. ML:1.9 0.0002605 0.34 AML other m 2023-05-31T10:07:57.64
IV.GUMA.HNN. ML:2.3 0.000833 1.58 AML other m 2023-05-31T10:07:58.00
IV.ARRO.EHN. ML:1.8 0.000255 0.18 AML other m 2023-05-31T10:07:58.02
IV.MOMA.HNE. ML:2.1 0.000371 0.96 AML other m 2023-05-31T10:07:58.80
IV.ASSB.HHE. ML:1.8 0.000199 0.28 AML other m 2023-05-31T10:07:58.37
IV.ASSB.HHN. ML:1.9 0.000212 0.38 AML other m 2023-05-31T10:07:58.51
IV.MOMA.HHE. ML:2.1 0.0003885 0.16 AML other m 2023-05-31T10:07:58.80
IV.MOMA.HHN. ML:1.7 0.00013550000000000001 1.18 AML other m 2023-05-31T10:07:59.06
IV.MOMA.HNN. ML:2.0 0.000325 1.18 AML other m 2023-05-31T10:07:59.06
IV.GIGS.HHE. ML:1.3 0.000044149999999999996 0.42 AML other m 2023-05-31T10:07:59.80
IV.CAMP.HHN. ML:1.6 0.000154 1.02 AML other m 2023-05-31T10:07:59.36
IV.CESX.HHE. ML:1.7 0.00013800000000000002 0.42 AML other m 2023-05-31T10:08:00.20
IV.GIGS.HHN. ML:1.2 0.00004215 0.74 AML other m 2023-05-31T10:08:00.37
IV.FIAM.HHN. ML:1.4 0.000062 0.92 AML other m 2023-05-31T10:08:02.29
IV.ATCC.EHN. ML:1.9 0.000176 0.76 AML other m 2023-05-31T10:08:02.40
IV.CESX.HHN. ML:1.7 0.0001295 0.68 AML other m 2023-05-31T10:08:02.75
IV.EL6.EHE. ML:1.8 0.00013550000000000001 0.1 AML other m 2023-05-31T10:08:02.65
IV.EL6.EHN. ML:1.9 0.0001605 0.2 AML other m 2023-05-31T10:08:03.12
IV.CING.HHN. ML:1.6 0.00007615 0.12 AML other m 2023-05-31T10:08:03.40
IV.ATCC.EHE. ML:1.8 0.0001385 0.96 AML other m 2023-05-31T10:08:03.84
IV.CING.HHE. ML:1.5 0.0000673 0.72 AML other m 2023-05-31T10:08:03.55
IV.FIAM.HHE. ML:1.4 0.00006245 0.78 AML other m 2023-05-31T10:08:06.76
IV.SSFR.HHE. ML:2.1 0.00016999999999999999 0.22 AML other m 2023-05-31T10:08:06.96
IV.SSFR.HHN. ML:1.9 0.00011649999999999999 1.24 AML other m 2023-05-31T10:08:07.35
IV.ARVD.HHE. ML:1.5 0.00004425 0.86 AML other m 2023-05-31T10:08:07.54
IV.ARVD.HHN. ML:1.4 0.0000341 0.7 AML other m 2023-05-31T10:08:09.38
IV.T0110.HHE. ML:1.9 0.0000983 0.68 AML other m 2023-05-31T10:08:09.24
IV.MGAB.HHE. ML:1.8 0.0000847 0.5 AML other m 2023-05-31T10:08:14.16
IV.MGAB.HHN. ML:1.9 0.0001026 0.44 AML other m 2023-05-31T10:08:15.14
IV.ATPI.EHE. ML:1.4 0.000026349999999999997 0.44 AML other m 2023-05-31T10:08:19.74
IV.T0110.HHN. ML:1.9 0.00010245 0.54 AML other m 2023-05-31T10:08:20.38
IV.ATPI.EHN. ML:1.4 0.00002995 1.24 AML other m 2023-05-31T10:08:24.36
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download