Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 13-03-2023 and time 16:52:04 (UTC) in region 2 km S Valfabbrica (PG)

A magnitude ML 1.1 earthquake occured in region: 2 km S Valfabbrica (PG), on

  • 13-03-2023 16:52:04 (UTC)
  • 13-03-2023 17:52:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1440, 12.5980 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.

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
Valfabbrica PG 2 3389 3389
Assisi PG 8 28299 31688
Bastia Umbra PG 9 21874 53562
Valtopina PG 16 1398 54960
Nocera Umbra PG 16 5839 60799
Cannara PG 16 4305 65104
Bettona PG 17 4367 69471
Perugia PG 17 166134 235605
Spello PG 18 8645 244250
Gualdo Tadino PG 18 15208 259458
Torgiano PG 19 6725 266183

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Perugia (166134 inhabitants)
23 Km NW of Foligno (57155 inhabitants)
65 Km N of Terni (111501 inhabitants)
68 Km SE of Arezzo (99543 inhabitants)
85 Km SW of Fano (60888 inhabitants)
89 Km S of Pesaro (94582 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
91 Km SW of Ancona (100861 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 1.1 2023-03-13
16:52:04		 43.1438 12.5977 10 2024-03-01
17:18:03		 Bollettino Sismico Italiano INGV 116318151
Reviewed
Rev100 		ML 1.0 2023-03-13
16:52:05		 43.1467 12.597 6 2023-03-13
17:09:58		 Sala Sismica INGV-Roma 115326751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-13 16:52:04 ± 0.16
Latitude 43.1438 ± 0.0090
Longitude 12.5977 ± 0.0160
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116318151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1372
Semi-minor axis of confidence ellipse (meter) 738
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 1370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.44606
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 116318151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-12 16:51:22

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 115326751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-13 17:09:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATSC.EHE. 2023-03-13T16:52:16.25 0.3 undecidable manual S 13 31.8459 50 0.53 65
IV.ATFO.HHZ. 2023-03-13T16:52:14.37 3.0 undecidable manual S 0
IV.ATLO.EHE. 2023-03-13T16:52:13.51 0.3 undecidable manual S 321 24.4533 50 -0.22 72
IV.FOSV.EHZ. 2023-03-13T16:52:13.28 0.6 undecidable manual S 38 21.3675 116 0.43 46
IV.CSP1.EHZ. 2023-03-13T16:52:12.96 0.6 undecidable manual P 96 49.5171 50 -0.78 39
IV.MURB.HHZ. 2023-03-13T16:52:11.09 0.3 undecidable manual S 336 14.4744 126 0.29 73
IV.ATSC.EHE. 2023-03-13T16:52:10.35 1.0 undecidable manual P 13 31.8459 50 -0.67 21
IV.ASSB.HHZ. 2023-03-13T16:52:10.40 0.3 undecidable manual S 156 12.2766 130 0.2 73
IV.FOSV.EHZ. 2023-03-13T16:52:09.35 0.6 undecidable manual P 38 21.3675 116 -0.02 50
IV.ATLO.EHE. 2023-03-13T16:52:09.71 0.3 undecidable manual P 321 24.4533 50 -0.17 73
IV.ASSB.HHZ. 2023-03-13T16:52:08.19 0.3 undecidable manual P 156 12.2766 130 0.35 71
IV.ATCC.EHZ. 2023-03-13T16:52:08.28 0.3 undecidable manual S 37 5.6943 151 -0.46 69
IV.MURB.HHZ. 2023-03-13T16:52:08.26 0.3 undecidable manual P 336 14.4744 126 0.08 75
IV.ATCC.EHZ. 2023-03-13T16:52:06.88 0.1 undecidable manual P 37 5.6943 151 -0.11 100
IV.ATFO.HHZ. 2023-03-13T16:52:03.08 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHE. ML:1.2 0.0002305 0.38 AML other m 2023-03-13T16:52:08.40
IV.ATCC.EHN. ML:1.1 0.0001905 0.36 AML other m 2023-03-13T16:52:08.79
IV.ASSB.HHE. ML:0.9 0.00008755 1.72 AML other m 2023-03-13T16:52:10.06
IV.MURB.HHE. ML:1.2 0.00016949999999999997 0.8 AML other m 2023-03-13T16:52:11.04
IV.ASSB.HHN. ML:0.9 0.00009375 1.46 AML other m 2023-03-13T16:52:11.96
IV.MURB.HHN. ML:1.3 0.00017549999999999998 1.06 AML other m 2023-03-13T16:52:13.77
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