Earthquake with magnitude of ML 1.6 on date 31-05-2023 and time 23:35:19 (Italy) in region 8 km E Norcia (PG)

A magnitude ML 1.6 earthquake occured in region: 8 km E Norcia (PG), on

  • 31-05-2023 21:35:19 (UTC)
  • 31-05-2023 23:35:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7710, 13.1890 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.

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 8 4957 4957
Arquata del Tronto AP 9 1178 6135
Accumoli RI 10 667 6802
Castelsantangelo sul Nera MC 14 281 7083
Montegallo AP 14 523 7606
Cascia PG 15 3217 10823
Preci PG 17 724 11547
Cittareale RI 17 482 12029
Amatrice RI 18 2657 14686
Acquasanta Terme AP 18 2916 17602
Montemonaco AP 18 604 18206
Visso MC 20 1107 19313
Ussita MC 20 444 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
45 Km E of Foligno (57155 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
50 Km E of Terni (111501 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
91 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
98 Km S 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
Reviewed
Rev100
ML 1.6 2023-05-31
21:35:19
42.7713 13.1888 8 2023-05-31
21:42:04
Sala Sismica INGV-Roma 117925941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-31 21:35:19 ± 0.08
Latitude 42.7713 ± 0.0036
Longitude 13.1888 ± 0.0074
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117925941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 560
Semi-minor axis of confidence ellipse (meter) 333
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.50542
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 117925941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-31 21:42:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2023-05-31T21:35:51.63 3.0 undecidable manual S 0.25 0
IV.ARVD.HHZ. 2023-05-31T21:35:46.15 3.0 undecidable manual S -0.37 0
IV.GIGS.HHZ. 2023-05-31T21:35:34.86 0.6 undecidable manual S 138 47.2194 50 -0.21 46
IV.SSFR.HHZ. 2023-05-31T21:35:34.06 3.0 undecidable manual P -0.06 0
IV.ARVD.HHZ. 2023-05-31T21:35:33.95 3.0 undecidable manual P -0.6 0
IV.GUMA.HHZ. 2023-05-31T21:35:32.27 0.6 undecidable manual S 20 34.4433 50 0.62 43
IV.CESI.HHZ. 2023-05-31T21:35:31.53 0.6 undecidable manual S 318 34.743 50 -0.2 47
IV.CESX.HHZ. 2023-05-31T21:35:31.60 3.0 positive manual P 2.5 0
IV.TERO.HHZ. 2023-05-31T21:35:31.98 0.3 undecidable manual S 116 37.629 50 -0.54 65
IV.ATCC.EHZ. 2023-05-31T21:35:31.02 3.0 negative manual P -0.2 0
IV.CING.HHZ. 2023-05-31T21:35:30.86 3.0 undecidable manual P -1.09 0
IV.FDMO.HHZ. 2023-05-31T21:35:30.29 0.3 undecidable manual S 344 30.5472 105 -0.12 73
IV.RM33.EHZ. 2023-05-31T21:35:29.96 0.6 undecidable manual S 176 29.1486 106 0.01 50
IV.MOMA.HHZ. 2023-05-31T21:35:29.11 3.0 positive manual P 0.28 0
IV.FIAM.HHZ. 2023-05-31T21:35:29.70 0.1 undecidable manual P 186 56.0994 50 -0.13 93
IV.MNTT.EHZ. 2023-05-31T21:35:28.94 0.1 negative manual P 46 46.2204 50 0.64 82
IV.LNSS.HHZ. 2023-05-31T21:35:28.07 0.6 undecidable manual S 213 22.2555 111 0.4 46
IV.GIGS.HHZ. 2023-05-31T21:35:28.33 1.0 undecidable manual P 138 47.2194 50 -0.12 24
IV.OFFI.HHZ. 2023-05-31T21:35:28.60 0.3 negative manual P 66 44.3223 50 0.6 63
IV.ASSB.HHZ. 2023-05-31T21:35:28.97 0.6 undecidable manual P 305 52.503 50 -0.31 45
IV.MML1.EHZ. 2023-05-31T21:35:27.41 3.0 negative manual P -0.21 0
IV.ARRO.EHZ. 2023-05-31T21:35:27.42 0.6 positive manual P 238 40.5261 50 -0.01 49
IV.CESI.HHZ. 2023-05-31T21:35:26.29 1.0 negative manual P 318 34.743 50 -0.24 24
IV.MMO1.EHZ. 2023-05-31T21:35:26.21 0.6 undecidable manual S 38 18.0708 115 -0.13 50
IV.GUMA.HHZ. 2023-05-31T21:35:26.42 0.6 positive manual P 20 34.4433 50 -0.06 49
IV.CSP1.EHZ. 2023-05-31T21:35:26.28 3.0 positive manual P -0.3 0
IV.TERO.HHZ. 2023-05-31T21:35:26.57 0.6 negative manual P 116 37.629 50 -0.41 45
IV.FDMO.HHZ. 2023-05-31T21:35:25.44 0.6 positive manual P 344 30.5472 105 -0.32 47
IV.RM33.EHZ. 2023-05-31T21:35:25.49 0.6 positive manual P 176 29.1486 106 -0.01 50
IV.LNSS.HHZ. 2023-05-31T21:35:24.45 0.1 undecidable manual P 213 22.2555 111 0.27 95
IV.MMO1.EHZ. 2023-05-31T21:35:23.33 0.1 positive manual P 38 18.0708 115 -0.08 100
IV.NRCA.HNZ. 2023-05-31T21:35:23.49 0.3 undecidable manual S 319 9.1797 132 -0.24 74
IV.NRCA.HNZ. 2023-05-31T21:35:22.09 0.6 negative manual P 319 9.1797 132 0.19 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.2 0.002175 0.72 AML other m 2023-05-31T21:35:24.31
IV.NRCA.HNN. ML:2.1 0.00203 0.16 AML other m 2023-05-31T21:35:24.31
IV.NRCA.HNE. ML:2.1 0.0017800000000000001 1.06 AML other m 2023-05-31T21:35:24.53
IV.NRCA.HHE. ML:2.1 0.00185 0.48 AML other m 2023-05-31T21:35:24.71
IV.MMO1.EHE. ML:1.5 0.00028849999999999997 0.74 AML other m 2023-05-31T21:35:27.42
IV.MMO1.EHN. ML:1.6 0.000326 0.56 AML other m 2023-05-31T21:35:27.53
IV.LNSS.HHE. ML:1.7 0.000381 0.54 AML other m 2023-05-31T21:35:29.47
IV.LNSS.HHN. ML:1.8 0.0004845 0.16 AML other m 2023-05-31T21:35:29.81
IV.FDMO.HHN. ML:1.4 0.00012154999999999999 0.2 AML other m 2023-05-31T21:35:30.50
IV.RM33.EHN. ML:1.6 0.00020500000000000002 0.96 AML other m 2023-05-31T21:35:30.88
IV.RM33.EHE. ML:1.5 0.0001605 0.48 AML other m 2023-05-31T21:35:31.29
IV.FDMO.HHE. ML:1.4 0.00010899999999999999 1.3 AML other m 2023-05-31T21:35:31.90
IV.TERO.HHN. ML:1.8 0.000266 0.08 AML other m 2023-05-31T21:35:32.41
IV.CSP1.EHN. ML:2.0 0.000366 0.22 AML other m 2023-05-31T21:35:32.28
IV.TERO.HHE. ML:1.6 0.00016749999999999998 0.12 AML other m 2023-05-31T21:35:32.53
IV.CSP1.EHE. ML:2.1 0.0004955000000000001 0.4 AML other m 2023-05-31T21:35:32.66
IV.CESI.HHN. ML:1.6 0.000161 1.14 AML other m 2023-05-31T21:35:32.88
IV.GUMA.HNE. ML:1.9 0.00032950000000000004 0.36 AML other m 2023-05-31T21:35:32.77
IV.GUMA.HHE. ML:2.0 0.000374 0.48 AML other m 2023-05-31T21:35:32.74
IV.GUMA.HNN. ML:2.0 0.0003675 0.6 AML other m 2023-05-31T21:35:33.25
IV.CESI.HHE. ML:1.4 0.00009669999999999999 1.18 AML other m 2023-05-31T21:35:33.33
IV.GUMA.HHN. ML:1.9 0.0003235 0.58 AML other m 2023-05-31T21:35:34.24
IV.MML1.EHN. ML:1.4 0.00008835 0.76 AML other m 2023-05-31T21:35:34.54
IV.MML1.EHE. ML:1.4 0.00008155000000000002 1.42 AML other m 2023-05-31T21:35:35.90
IV.ARRO.EHE. ML:1.3 0.00007595 0.52 AML other m 2023-05-31T21:35:35.75
IV.ARRO.EHN. ML:1.4 0.0000848 0.18 AML other m 2023-05-31T21:35:36.23
IV.ASSB.HHE. ML:1.5 0.0000802 0.62 AML other m 2023-05-31T21:35:38.12
IV.ASSB.HHN. ML:1.4 0.00005989999999999999 0.94 AML other m 2023-05-31T21:35:38.71
IV.OFFI.HHN. ML:1.6 0.0001365 0.5 AML other m 2023-05-31T21:35:41.64
IV.CING.HHE. ML:1.4 0.000037749999999999996 0.88 AML other m 2023-05-31T21:35:43.06
IV.ATCC.EHN. ML:1.4 0.0000467 1.44 AML other m 2023-05-31T21:35:43.90
IV.CING.HHN. ML:1.3 0.000036750000000000006 0.3 AML other m 2023-05-31T21:35:43.83
IV.ATCC.EHE. ML:1.4 0.00004615 0.42 AML other m 2023-05-31T21:35:44.85
IV.OFFI.HHE. ML:1.5 0.00009975 1.46 AML other m 2023-05-31T21:35:44.06
IV.SSFR.HHN. ML:1.7 0.0000726 0.2 AML other m 2023-05-31T21:35:46.90
IV.SSFR.HHE. ML:1.6 0.0000609 0.24 AML other m 2023-05-31T21:35:47.10
IV.ARVD.HHN. ML:1.3 0.00002495 0.44 AML other m 2023-05-31T21:35:47.18
IV.ARVD.HHE. ML:1.4 0.0000309 1.5 AML other m 2023-05-31T21:35:47.14
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