Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 18-05-2023 and time 19:42:20 (Italy) in region 1 km E Castelsantangelo sul Nera (MC)

A magnitude ML 1.4 earthquake occured in region: 1 km E Castelsantangelo sul Nera (MC), on

  • 18-05-2023 17:42:20 (UTC)
  • 18-05-2023 19:42:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8960, 13.1690 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
Castelsantangelo sul Nera MC 1 281 281
Ussita MC 6 444 725
Visso MC 8 1107 1832
Preci PG 11 724 2556
Bolognola MC 12 142 2698
Norcia PG 13 4957 7655
Montemonaco AP 13 604 8259
Montegallo AP 15 523 8782
Acquacanina MC 15 121 8903
Montefortino FM 15 1178 10081
Fiastra MC 16 559 10640
Fiordimonte MC 17 202 10842
Arquata del Tronto AP 17 1178 12020
Monte Cavallo MC 18 145 12165
Amandola FM 18 3629 15794
Sarnano MC 19 3264 19058
Pieve Torina MC 19 1458 20516
Sellano PG 20 1079 21595
Pievebovigliana MC 20 866 22461

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
51 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
63 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
98 Km W of Pescara (121014 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 1.4 2023-05-18
17:42:20		 42.8955 13.169 8 2023-05-18
17:53:36		 Sala Sismica INGV-Roma 117458921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-18 17:42:20 ± 0.06
Latitude 42.8955 ± 0.0027
Longitude 13.1690 ± 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 117458921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 350
Semi-minor axis of confidence ellipse (meter) 209
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.07374
Epicentral distance of station farthest from the epicenter (degree) 0.62863
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 117458921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-18 17:53:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2023-05-18T17:42:42.80 0.1 undecidable manual S 333 67.6767 50 0.81 74
IV.EL6.EHZ. 2023-05-18T17:42:36.90 0.6 undecidable manual S 354 48.4182 50 0.04 48
IV.FIAM.HHZ. 2023-05-18T17:42:33.60 0.3 undecidable manual P 183 69.7746 50 0.28 65
IV.SSFR.HHZ. 2023-05-18T17:42:32.90 0.1 undecidable manual P 333 67.6767 50 -0.11 91
IV.PF6.EHZ. 2023-05-18T17:42:30.10 0.3 undecidable manual S 4 26.9508 106 -0.36 70
IV.MOMA.HHZ. 2023-05-18T17:42:30.37 0.3 undecidable manual P 258 49.7169 50 0.13 70
IV.CESI.HHZ. 2023-05-18T17:42:29.90 0.3 undecidable manual S 300 24.6531 107 0.2 72
IV.ASSB.HHZ. 2023-05-18T17:42:29.02 0.1 undecidable manual P 292 44.5221 50 -0.42 89
IV.GUMA.HHZ. 2023-05-18T17:42:29.60 0.3 undecidable manual S 36 22.9548 109 0.47 68
IV.EL6.EHZ. 2023-05-18T17:42:29.59 0.3 undecidable manual P 354 48.4182 50 -0.45 66
IV.TERO.HHZ. 2023-05-18T17:42:29.49 0.1 undecidable manual P 130 46.62 50 -0.27 91
IV.CSP1.EHZ. 2023-05-18T17:42:29.00 0.3 undecidable manual S 8 21.9669 109 0.19 73
IV.RM33.EHZ. 2023-05-18T17:42:28.97 0.3 undecidable manual P 175 43.0236 50 -0.24 69
IV.SMA1.EHZ. 2023-05-18T17:42:27.29 0.1 undecidable manual P 155 32.3454 103 -0.11 97
IV.LNSS.HHZ. 2023-05-18T17:42:27.71 0.1 undecidable manual P 198 34.1436 103 -0.03 98
IV.MML1.EHZ. 2023-05-18T17:42:26.47 0.1 undecidable manual P 327 28.9488 105 -0.28 94
IV.MMO1.HNZ. 2023-05-18T17:42:26.00 0.3 undecidable manual S 88 12.876 121 0.07 76
IV.FDMO.HHZ. 2023-05-18T17:42:26.90 0.1 undecidable manual S 337 16.9719 114 -0.31 95
IV.MF5.EHZ. 2023-05-18T17:42:26.82 0.1 undecidable manual P 66 25.752 107 0.71 83
IV.PF6.EHZ. 2023-05-18T17:42:26.01 0.1 undecidable manual P 4 26.9508 106 -0.34 93
7F.SIB2.EHZ. 2023-05-18T17:42:25.00 0.1 undecidable manual S 93 10.9779 125 -0.39 95
IV.CSP1.EHZ. 2023-05-18T17:42:25.19 0.1 undecidable manual P 8 21.9669 109 -0.21 97
IV.CESI.HHZ. 2023-05-18T17:42:25.83 0.3 undecidable manual P 300 24.6531 107 -0.08 74
IV.GUMA.HHZ. 2023-05-18T17:42:25.84 0.1 undecidable manual P 36 22.9548 109 0.26 95
IV.FEMA.HNZ. 2023-05-18T17:42:25.90 0.1 undecidable manual S 307 12.1767 122 0.16 99
IV.MTRA.HNZ. 2023-05-18T17:42:25.97 0.3 undecidable manual P 130 24.0537 108 0.17 73
IV.FDMO.HHZ. 2023-05-18T17:42:24.33 0.3 undecidable manual P 337 16.9719 114 -0.14 74
IV.NRCA.HHZ. 2023-05-18T17:42:24.80 0.1 undecidable manual S 213 8.1807 133 0.16 100
IT.MTCL.HGZ. 2023-05-18T17:42:24.50 0.1 undecidable manual P 308 17.5713 114 -0.08 100
7F.SIB3.EHZ. 2023-05-18T17:42:24.50 0.3 undecidable manual S 105 8.4804 132 -0.22 74
IV.FEMA.HNZ. 2023-05-18T17:42:23.80 0.1 undecidable manual P 307 12.1767 122 0.18 99
7F.SIB3.EHZ. 2023-05-18T17:42:23.07 0.3 undecidable manual P 105 8.4804 132 0.03 77
IV.MMO1.HNZ. 2023-05-18T17:42:23.89 0.1 undecidable manual P 88 12.876 121 0.16 99
7F.SIB2.EHZ. 2023-05-18T17:42:23.46 0.3 undecidable manual P 93 10.9779 125 0.04 76
IV.NRCA.HHZ. 2023-05-18T17:42:23.21 0.3 undecidable manual P 213 8.1807 133 0.22 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.0 0.00033452075 0.192 AML other m 2023-05-18T17:42:27.62
IV.FDMO.HHE. ML:0.0 0.0003045 0.44 AML other m 2023-05-18T17:42:28.86
IV.GUMA.HNN. ML:0.0 0.0004786568 0.2432 AML other m 2023-05-18T17:42:29.89
IV.GUMA.HHN. ML:0.0 0.0004889138000000001 0.2688 AML other m 2023-05-18T17:42:29.90
IV.CSP1.EHN. ML:0.0 0.0003830881 0.2176 AML other m 2023-05-18T17:42:30.49
IV.CSP1.EHE. ML:0.0 0.0002166606 0.3584 AML other m 2023-05-18T17:42:31.55
IV.CESI.HHN. ML:0.0 0.00016385275 0.2304 AML other m 2023-05-18T17:42:31.18
IV.CESI.HHE. ML:0.0 0.00011029585 0.2432 AML other m 2023-05-18T17:42:31.74
IV.MML1.EHN. ML:0.0 0.00010052169 0.1664 AML other m 2023-05-18T17:42:31.60
IV.GUMA.HHE. ML:0.0 0.0004591474 0.4224 AML other m 2023-05-18T17:42:32.49
IV.GUMA.HNE. ML:0.0 0.0003967586 0.4608 AML other m 2023-05-18T17:42:32.51
IV.MML1.EHE. ML:0.0 0.000090438285 0.1792 AML other m 2023-05-18T17:42:31.69
IV.MF5.EHE. ML:0.0 0.00011773473500000001 0.5632 AML other m 2023-05-18T17:42:35.55
IV.LNSS.HHE. ML:0.0 0.00013758710000000003 0.1792 AML other m 2023-05-18T17:42:33.68
IV.MF5.EHN. ML:0.0 0.00010604746000000001 0.4352 AML other m 2023-05-18T17:42:35.24
IV.LNSS.HHN. ML:0.0 0.0001072759 0.2432 AML other m 2023-05-18T17:42:35.17
IV.RM33.EHN. ML:0.0 0.00006106782 0.32 AML other m 2023-05-18T17:42:36.74
IV.TERO.HHE. ML:0.0 0.00006208747000000001 0.128 AML other m 2023-05-18T17:42:36.86
IV.RM33.EHE. ML:0.0 0.00004608932 0.1792 AML other m 2023-05-18T17:42:37.77
IV.ASSB.HHE. ML:0.0 0.00005395904 0.2048 AML other m 2023-05-18T17:42:37.86
IV.TERO.HHN. ML:0.0 0.0000536844 0.2816 AML other m 2023-05-18T17:42:38.11
IV.SMA1.EHE. ML:0.0 0.00006859306500000001 0.3968 AML other m 2023-05-18T17:42:38.37
IV.ASSB.HHN. ML:0.0 0.0000541653 0.1536 AML other m 2023-05-18T17:42:39.11
IV.SMA1.EHN. ML:0.0 0.000091993825 0.4992 AML other m 2023-05-18T17:42:39.70
IV.SSFR.HHN. ML:0.0 0.000066048595 0.2816 AML other m 2023-05-18T17:42:44.54
IV.SSFR.HHE. ML:0.0 0.0000557691 0.2176 AML other m 2023-05-18T17:42:44.15
IV.NRCA.HHE. ML:0.0 0.004737768 0.128 AML other m 2023-05-18T17:42:25.45
IV.NRCA.HHN. ML:0.0 0.0015823375 0.1536 AML other m 2023-05-18T17:42:26.14
IV.NRCA.HNE. ML:0.0 0.00440082 0.1408 AML other m 2023-05-18T17:42:25.51
IV.NRCA.HNN. ML:0.0 0.001252932 0.1408 AML other m 2023-05-18T17:42:26.13
IV.CESI.HNE. ML:1.3 0.00012635764 0.3328 AML other m 2023-05-18T17:42:30.18
IV.CESI.HNN. ML:1.4 0.0001773127 0.3328 AML other m 2023-05-18T17:42:30.61
IV.EL6.EHE. ML:1.4 0.000071244685 0.2432 AML other m 2023-05-18T17:42:40.68
IV.EL6.EHN. ML:1.6 0.000098470005 0.4608 AML other m 2023-05-18T17:42:40.75
IV.MOMA.HHE. ML:1.4 0.000074199275 0.1536 AML other m 2023-05-18T17:42:40.22
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