Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 23-04-2023 and time 10:04:07 (Italy) in region 6 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.2 earthquake occured in region: 6 km SE Castelsantangelo sul Nera (MC), on

  • 23-04-2023 08:04:07 (UTC)
  • 23-04-2023 10:04:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8560, 13.1970 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
Castelsantangelo sul Nera MC 6 281 281
Ussita MC 11 444 725
Norcia PG 11 4957 5682
Montegallo AP 11 523 6205
Montemonaco AP 12 604 6809
Visso MC 12 1107 7916
Arquata del Tronto AP 12 1178 9094
Preci PG 13 724 9818
Montefortino FM 15 1178 10996
Bolognola MC 16 142 11138
Accumoli RI 18 667 11805
Amandola FM 19 3629 15434
Acquacanina MC 20 121 15555
Acquasanta Terme AP 20 2916 18471

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
56 Km NE of Terni (111501 inhabitants)
58 Km N of L'Aquila (69753 inhabitants)
71 Km E of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
94 Km W of Pescara (121014 inhabitants)
97 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
Bulletin
Rev1000 		ML 1.2 2023-04-23
08:04:07		 42.8562 13.1973 10 2024-03-01
17:18:05		 Bollettino Sismico Italiano INGV 116954451
Reviewed
Rev100 		ML 1.2 2023-04-23
08:04:07		 42.857 13.2018 10 2023-04-23
08:22:58		 Sala Sismica INGV-Roma 116635651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-23 08:04:07 ± 0.06
Latitude 42.8562 ± 0.0036
Longitude 13.1973 ± 0.0061
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 116954451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 466
Semi-minor axis of confidence ellipse (meter) 395
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34714
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 116635651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-23 08:22:58

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 116954451
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-02 08:12:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPAG.EHZ. 2023-04-23T08:04:35.92 3.0 undecidable manual S -4.25 0
IV.SFI.EHZ. 2023-04-23T08:04:33.40 3.0 positive manual Pn 0.81 0
7F.EL6.EHZ. 2023-04-23T08:04:26.24 3.0 undecidable manual P 0
IV.MML1.EHZ. 2023-04-23T08:04:19.54 0.1 undecidable manual S 327 33.9438 50 0.14 94
IV.CESI.HHZ. 2023-04-23T08:04:18.20 0.3 undecidable manual S 305 28.9488 50 0.12 71
IV.LNSS.HHZ. 2023-04-23T08:04:18.39 0.3 undecidable manual S 205 30.8469 50 -0.2 70
IV.SMA1.EHZ. 2023-04-23T08:04:17.56 3.0 undecidable manual S 0.01 0
IV.CSP1.EHZ. 2023-04-23T08:04:17.16 0.6 undecidable manual S 1 26.1516 50 -0.17 47
IV.GUMA.HHZ. 2023-04-23T08:04:17.51 0.3 undecidable manual S 26 25.4523 111 0.37 68
IV.FDMO.HHZ. 2023-04-23T08:04:15.85 0.3 undecidable manual S 336 21.867 114 -0.14 72
IV.RM33.EHZ. 2023-04-23T08:04:15.22 0.1 undecidable manual P 178 38.5281 50 0.08 94
IV.MML1.EHZ. 2023-04-23T08:04:14.46 0.1 undecidable manual P 327 33.9438 50 0.03 96
IV.LNSS.HHZ. 2023-04-23T08:04:13.95 0.1 undecidable manual P 205 30.8469 50 -0.01 97
IV.GUMA.HHZ. 2023-04-23T08:04:13.43 0.3 undecidable manual P 26 25.4523 111 0.31 69
IV.CESI.HHZ. 2023-04-23T08:04:13.66 0.1 positive manual P 305 28.9488 50 0 97
IV.CSP1.EHZ. 2023-04-23T08:04:12.71 0.3 undecidable manual P 1 26.1516 50 -0.52 65
IV.MMO1.HNE. 2023-04-23T08:04:12.74 0.1 undecidable manual S 66 11.5773 131 -0.19 96
IV.SMA1.EHZ. 2023-04-23T08:04:12.88 3.0 undecidable manual P -0.46 0
IV.FDMO.HHZ. 2023-04-23T08:04:12.08 0.1 undecidable manual P 336 21.867 114 -0.38 91
7F.SIB2.EHE. 2023-04-23T08:04:12.12 0.6 undecidable manual S 66 9.4794 136 -0.29 47
7F.SIB3.EHE. 2023-04-23T08:04:11.33 0.3 undecidable manual S 70 6.2937 148 -0.39 70
IV.NRCA.HHZ. 2023-04-23T08:04:11.87 0.3 undecidable manual S 250 7.1928 144 -0.03 75
IV.MMO1.HNE. 2023-04-23T08:04:11.04 0.1 undecidable manual P 66 11.5773 131 0.34 93
7F.SIB1.EHE. 2023-04-23T08:04:11.87 0.1 undecidable manual S 54 7.2927 144 -0.05 100
7F.SIB1.EHE. 2023-04-23T08:04:10.35 0.1 negative manual P 54 7.2927 144 0.24 96
7F.SIB2.EHE. 2023-04-23T08:04:10.45 0.1 undecidable manual P 66 9.4794 136 0.06 99
7F.SIB3.EHE. 2023-04-23T08:04:10.08 0.1 undecidable manual P 70 6.2937 148 0.09 99
IV.NRCA.HHZ. 2023-04-23T08:04:10.32 0.1 positive manual P 250 7.1928 144 0.22 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.00095 0.16 AML other m 2023-04-23T08:04:11.99
IV.NRCA.HHN. ML:1.4 0.00042100000000000004 0.1 AML other m 2023-04-23T08:04:12.23
IV.FDMO.HHE. ML:1.0 0.000058450000000000005 0.2 AML other m 2023-04-23T08:04:16.23
IV.FDMO.HHN. ML:1.1 0.00008345 0.28 AML other m 2023-04-23T08:04:16.21
IV.CESI.HHN. ML:1.2 0.00008675 0.14 AML other m 2023-04-23T08:04:18.45
IV.CESI.HHE. ML:1.0 0.00004675 0.26 AML other m 2023-04-23T08:04:18.59
IV.GUMA.HHN. ML:1.3 0.00010680000000000001 0.66 AML other m 2023-04-23T08:04:18.36
IV.LNSS.HHN. ML:1.2 0.00007960000000000001 0.64 AML other m 2023-04-23T08:04:18.81
IV.LNSS.HHE. ML:1.2 0.00007555000000000001 0.92 AML other m 2023-04-23T08:04:19.15
IV.GUMA.HHE. ML:1.1 0.0000804 0.22 AML other m 2023-04-23T08:04:19.74
IV.MML1.EHE. ML:0.8 0.000022499999999999998 0.12 AML other m 2023-04-23T08:04:19.75
IV.MML1.EHN. ML:0.8 0.000029449999999999998 1.86 AML other m 2023-04-23T08:04:20.02
IV.SFI.EHE. ML:1.5 0.0000151 0.62 AML other m 2023-04-23T08:04:38.55
IV.SFI.EHN. ML:1.5 0.000015765000000000002 0.5 AML other m 2023-04-23T08:04:45.70
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