Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 28-02-2024 and time 23:34:16 (Italy) in region 1 km S Ussita (MC)

A magnitude ML 1.1 earthquake occured in region: 1 km S Ussita (MC), on

  • 28-02-2024 22:34:16 (UTC)
  • 28-02-2024 23:34:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9340, 13.1430 at 10 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
Ussita MC 1 444 444
Castelsantangelo sul Nera MC 4 281 725
Visso MC 4 1107 1832
Bolognola MC 10 142 1974
Preci PG 10 724 2698
Acquacanina MC 11 121 2819
Fiastra MC 12 559 3378
Fiordimonte MC 12 202 3580
Monte Cavallo MC 13 145 3725
Pieve Torina MC 15 1458 5183
Pievebovigliana MC 15 866 6049
Montemonaco AP 16 604 6653
Norcia PG 16 4957 11610
Montefortino FM 16 1178 12788
Sarnano MC 17 3264 16052
Amandola FM 18 3629 19681
Sellano PG 18 1079 20760
Muccia MC 18 915 21675
Montegallo AP 19 523 22198

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
55 Km NW of Teramo (54892 inhabitants)
58 Km NE of Terni (111501 inhabitants)
64 Km E of Perugia (166134 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
95 Km NW of Montesilvano (53738 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 1.1 2024-02-28
22:34:16		 42.9338 13.1427 10 2024-02-28
22:45:18		 Sala Sismica INGV-Roma 125606051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-02-28 22:34:16 ± 0.12
Latitude 42.9338 ± 0.0027
Longitude 13.1427 ± 0.0037
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 125606051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 279
Semi-minor axis of confidence ellipse (meter) 59
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 13
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
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) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.10252
Epicentral distance of station farthest from the epicenter (degree) 0.23832
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:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 125606051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-02-28 22:45:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GUMA.HHZ. 2024-02-28T22:34:24.88 0.6 undecidable manual S 47 21.1677 115 0.31 47
IV.CESI.HHZ. 2024-02-28T22:34:24.53 0.6 undecidable manual S 292 20.868 115 0.05 50
IV.CSP1.EHZ. 2024-02-28T22:34:23.51 0.6 undecidable manual S 16 18.2706 118 -0.16 49
IV.MMO1.EHZ. 2024-02-28T22:34:22.64 0.6 undecidable manual S 104 15.4734 122 -0.19 49
IV.MF5.EHZ. 2024-02-28T22:34:22.13 0.1 undecidable manual P 77 26.4513 110 0.01 100
IV.GUMA.HHZ. 2024-02-28T22:34:21.34 0.6 negative manual P 47 21.1677 115 0.19 49
IV.CESI.HHZ. 2024-02-28T22:34:21.04 0.1 undecidable manual P 292 20.868 115 -0.06 100
IV.NRCA.HHZ. 2024-02-28T22:34:21.79 0.6 undecidable manual S 192 11.3775 131 0.1 50
IV.FDMO.HHZ. 2024-02-28T22:34:21.91 0.6 undecidable manual S 338 12.2766 129 -0.02 51
IV.MMO1.EHZ. 2024-02-28T22:34:20.05 0.3 undecidable manual P 104 15.4734 122 -0.1 75
IV.CSP1.EHZ. 2024-02-28T22:34:20.58 0.3 undecidable manual P 16 18.2706 118 -0.05 75
IV.FDMO.HHZ. 2024-02-28T22:34:19.58 1.0 undecidable manual P 338 12.2766 129 -0.04 25
IV.NRCA.HHZ. 2024-02-28T22:34:19.57 0.6 undecidable manual P 192 11.3775 131 0.08 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.3 0.000225 0.08 AML other m 2024-02-28T22:34:21.86
IV.NRCA.HHE. ML:1.2 0.0001705 0.12 AML other m 2024-02-28T22:34:22.59
IV.MMO1.EHE. ML:1.0 0.00008335 0.62 AML other m 2024-02-28T22:34:22.90
IV.MMO1.EHN. ML:0.8 0.00006665000000000001 0.52 AML other m 2024-02-28T22:34:23.01
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