Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 30-05-2023 and time 09:37:58 (UTC) in region 1 km NW Castelsantangelo sul Nera (MC)

A magnitude ML 0.8 earthquake occured in region: 1 km NW Castelsantangelo sul Nera (MC), on

  • 30-05-2023 09:37:58 (UTC)
  • 30-05-2023 11:37:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9050, 13.1460 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 5 444 725
Visso MC 6 1107 1832
Preci PG 9 724 2556
Bolognola MC 12 142 2698
Norcia PG 13 4957 7655
Acquacanina MC 14 121 7776
Fiastra MC 15 559 8335
Montemonaco AP 15 604 8939
Monte Cavallo MC 15 145 9084
Fiordimonte MC 16 202 9286
Montefortino FM 17 1178 10464
Montegallo AP 17 523 10987
Pieve Torina MC 17 1458 12445
Sellano PG 18 1079 13524
Pievebovigliana MC 18 866 14390
Arquata del Tronto AP 19 1178 15568
Amandola FM 19 3629 19197
Sarnano MC 19 3264 22461

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
53 Km NW of Teramo (54892 inhabitants)
56 Km NE of Terni (111501 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
66 Km E of Perugia (166134 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
100 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 0.8 2023-05-30
09:37:58		 42.9047 13.1458 9 2023-05-30
09:46:57		 Sala Sismica INGV-Roma 117876201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-30 09:37:58 ± 0.12
Latitude 42.9047 ± 0.0027
Longitude 13.1458 ± 0.0025
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117876201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 336
Semi-minor axis of confidence ellipse (meter) 155
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.24462
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 117876201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-30 09:46:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHZ. 2023-05-30T09:38:07.10 0.3 undecidable manual S 300 22.5552 111 -0.15 72
IT.MTCL.HGE. 2023-05-30T09:38:05.10 0.3 undecidable manual S 310 15.4734 119 0.08 74
IV.FDMO.HHZ. 2023-05-30T09:38:05.03 0.6 undecidable manual S 342 15.3735 119 0.04 50
IV.MML1.EHZ. 2023-05-30T09:38:04.38 0.3 undecidable manual P 329 27.1506 107 -0.21 70
7F.SIB2.EHE. 2023-05-30T09:38:04.27 0.3 undecidable manual S 97 12.876 123 0.01 75
IV.CESI.HHZ. 2023-05-30T09:38:03.70 0.6 positive manual P 300 22.5552 111 -0.02 49
7F.SIB3.EHE. 2023-05-30T09:38:03.43 0.6 undecidable manual S 108 10.5783 129 -0.18 49
IV.NRCA.HHZ. 2023-05-30T09:38:02.98 0.6 undecidable manual S 198 8.2806 136 -0.03 50
7F.SIB2.EHE. 2023-05-30T09:38:02.07 0.1 undecidable manual P 97 12.876 123 0.08 99
IT.MTCL.HGE. 2023-05-30T09:38:02.50 0.1 undecidable manual P 310 15.4734 119 0.07 99
IV.FDMO.HHZ. 2023-05-30T09:38:02.52 0.1 undecidable manual P 342 15.3735 119 0.1 98
IV.NRCA.HHZ. 2023-05-30T09:38:01.35 0.1 negative manual P 198 8.2806 136 0.08 100
7F.SIB3.EHE. 2023-05-30T09:38:01.57 0.1 undecidable manual P 108 10.5783 129 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.9 0.00013700000000000002 0.06 AML other m 2023-05-30T09:38:03.56
IV.NRCA.HHE. ML:1.1 0.00018249765 0.064 AML other m 2023-05-30T09:38:03.55
IV.FDMO.HHE. ML:0.2 0.000017398255000000003 0.1408 AML other m 2023-05-30T09:38:05.52
IV.FDMO.HHN. ML:0.2 0.00001655 0.12 AML other m 2023-05-30T09:38:05.86
IV.CESI.HHE. ML:0.7 0.000034949999999999996 0.4 AML other m 2023-05-30T09:38:07.64
IV.CESI.HHN. ML:0.9 0.00004895 0.24 AML other m 2023-05-30T09:38:07.65
IV.NRCA.HNE. ML:1.0 0.000168804985 0.0704 AML other m 2023-05-30T09:38:03.54
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