Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 02-03-2023 and time 20:18:36 (UTC) in region 3 km S Montefalco (PG)

A magnitude ML 0.9 earthquake occured in region: 3 km S Montefalco (PG), on

  • 02-03-2023 20:18:36 (UTC)
  • 02-03-2023 21:18:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8680, 12.6440 at 9 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
Montefalco PG 3 5679 5679
Castel Ritaldi PG 5 3278 8957
Giano dell'Umbria PG 7 3846 12803
Bevagna PG 8 5081 17884
Gualdo Cattaneo PG 9 6155 24039
Trevi PG 9 8469 32508
Foligno PG 11 57155 89663
Campello sul Clitunno PG 12 2442 92105
Massa Martana PG 14 3770 95875
Spello PG 14 8645 104520
Cannara PG 15 4305 108825
Spoleto PG 17 38218 147043
Collazzone PG 17 3473 150516

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SW of Foligno (57155 inhabitants)
34 Km SE of Perugia (166134 inhabitants)
34 Km N of Terni (111501 inhabitants)
67 Km NE of Viterbo (67173 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
90 Km W of Teramo (54892 inhabitants)
91 Km SE of Arezzo (99543 inhabitants)
97 Km N of Guidonia Montecelio (88673 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 0.9 2023-03-02
20:18:36		 42.8677 12.6435 9 2023-03-02
20:25:58		 Sala Sismica INGV-Roma 114947591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-02 20:18:36 ± 0.06
Latitude 42.8677 ± 0.0018
Longitude 12.6435 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 114947591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 348
Semi-minor axis of confidence ellipse (meter) 211
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 283
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) 144
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 14
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36602
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 2
Type of magnitude ML
Reference to an origin 114947591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-02 20:25:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.POPM.HHZ. 2023-03-02T20:19:11.94 3.0 positive manual Pn 2.03 0
IV.RIBO.EHZ.01 2023-03-02T20:18:59.49 3.0 undecidable manual P -2.02 0
IV.SRES.HHZ. 2023-03-02T20:18:53.40 3.0 undecidable manual P 1.88 0
IV.FIAM.HHZ. 2023-03-02T20:18:51.31 3.0 negative manual Pg -0.59 0
IV.NRCA.HHZ. 2023-03-02T20:18:49.29 0.6 undecidable manual S 95 38.4282 50 -0.03 51
IV.FDMO.HHZ. 2023-03-02T20:18:49.85 0.6 undecidable manual S 62 40.626 50 -0.03 50
IV.ARRO.EHZ. 2023-03-02T20:18:48.09 0.6 undecidable manual S 163 33.5442 50 0.1 50
IV.MGAB.HHZ. 2023-03-02T20:18:47.78 3.0 positive manual P 0.87 0
IV.ATCC.EHZ. 2023-03-02T20:18:47.14 3.0 undecidable manual Sn -2.11 0
IV.GAVE.EHZ. 2023-03-02T20:18:46.69 0.6 undecidable manual S 134 28.2495 108 0.24 49
IV.CESX.HHZ. 2023-03-02T20:18:46.43 3.0 undecidable manual Sn -2.06 0
IV.CSP1.EHZ. 2023-03-02T20:18:45.92 3.0 negative manual Pn -0.41 0
IV.CESI.HHZ. 2023-03-02T20:18:45.70 0.6 undecidable manual S 54 26.0517 109 -0.05 51
IV.FDMO.HHZ. 2023-03-02T20:18:44.17 1.0 negative manual P 62 40.626 50 0.09 25
IV.NRCA.HHZ. 2023-03-02T20:18:43.64 0.3 negative manual P 95 38.4282 50 -0.11 75
IV.ASSB.HHZ. 2023-03-02T20:18:43.61 0.6 undecidable manual S 4 19.4694 115 0 53
IV.ARRO.EHZ. 2023-03-02T20:18:43.07 1.0 positive manual P 163 33.5442 50 0.08 25
IV.CESI.HHZ. 2023-03-02T20:18:41.84 1.0 undecidable manual P 54 26.0517 109 0.15 25
IV.GAVE.EHZ. 2023-03-02T20:18:41.92 0.1 undecidable manual P 134 28.2495 108 -0.17 100
IV.ASSB.HHZ. 2023-03-02T20:18:40.60 0.6 undecidable manual P 4 19.4694 115 0.14 51
IV.MOMA.HHZ. 2023-03-02T20:18:40.58 0.6 undecidable manual S 220 9.2796 135 -0.09 53
IV.MOMA.HHZ. 2023-03-02T20:18:38.80 0.6 positive manual P 220 9.2796 135 0.04 53
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:0.7 0.00006659999999999999 0.46 AML other m 2023-03-02T20:18:41.13
IV.MOMA.HHE. ML:1.2 0.00022250000000000001 0.16 AML other m 2023-03-02T20:18:41.49
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