Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 03-04-2024 and time 23:20:51 (UTC) in region 1 km S Assisi (PG)

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

  • 03-04-2024 23:20:51 (UTC)
  • 04-04-2024 01:20:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0600, 12.6170 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.

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
Assisi PG 1 28299 28299
Bastia Umbra PG 6 21874 50173
Cannara PG 8 4305 54478
Spello PG 9 8645 63123
Valtopina PG 11 1398 64521
Valfabbrica PG 11 3389 67910
Bettona PG 12 4367 72277
Foligno PG 14 57155 129432
Bevagna PG 14 5081 134513
Torgiano PG 15 6725 141238
Nocera Umbra PG 15 5839 147077
Gualdo Cattaneo PG 17 6155 153232
Deruta PG 18 9669 162901
Montefalco PG 19 5679 168580
Perugia PG 19 166134 334714

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NW of Foligno (57155 inhabitants)
19 Km E of Perugia (166134 inhabitants)
55 Km N of Terni (111501 inhabitants)
75 Km SE of Arezzo (99543 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Fano (60888 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
98 Km S of Pesaro (94582 inhabitants)
99 Km W of Teramo (54892 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 2024-04-03
23:20:51		 43.0598 12.617 9 2024-04-04
00:07:38		 Sala Sismica INGV-Roma 126456771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-04-03 23:20:51 ± 0.16
Latitude 43.0598 ± 0.0072
Longitude 12.6170 ± 0.0111
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 126456771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1133
Semi-minor axis of confidence ellipse (meter) 346
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 1130.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 220
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42808
Number of stations at which the event was observed 8
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 10
Type of magnitude ML
Reference to an origin 126456771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-04 00:07:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2024-04-03T23:21:02.44 3.0 undecidable manual S -0.15 0
IV.MML1.EHZ. 2024-04-03T23:21:01.67 0.1 undecidable manual S 78 29.3484 50 -0.14 95
IV.MURB.HHZ. 2024-04-03T23:21:00.31 0.3 undecidable manual S 342 23.754 112 0.3 70
IV.NRCA.HHZ. 2024-04-03T23:21:00.08 0.3 undecidable manual P 122 47.5191 50 -0.03 71
IV.CESI.HHZ. 2024-04-03T23:21:00.37 0.1 undecidable manual S 105 24.0537 111 0.24 95
IV.FDMO.HHZ. 2024-04-03T23:20:58.65 0.1 undecidable manual P 94 38.2284 50 -0.03 96
IV.MML1.EHZ. 2024-04-03T23:20:57.23 0.1 undecidable manual P 78 29.3484 50 -0.08 97
IV.CESI.HHZ. 2024-04-03T23:20:56.56 0.1 undecidable manual P 105 24.0537 111 0.23 95
IV.ATCC.EHZ. 2024-04-03T23:20:56.83 0.1 undecidable manual S 8 14.0748 124 -0.18 97
IV.MURB.HHZ. 2024-04-03T23:20:56.17 0.1 undecidable manual P 342 23.754 112 -0.09 97
IV.ASSB.HHZ. 2024-04-03T23:20:54.29 0.1 undecidable manual S 119 3.8961 158 -0.38 95
IV.ATCC.EHZ. 2024-04-03T23:20:54.66 0.1 undecidable manual P 8 14.0748 124 0.13 99
IV.ASSB.HHZ. 2024-04-03T23:20:53.33 0.1 undecidable manual P 119 3.8961 158 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.1 0.00022600000000000002 0.08 AML other m 2024-04-03T23:20:54.46
IV.ASSB.HHN. ML:1.3 0.00038449999999999997 0.32 AML other m 2024-04-03T23:20:54.56
IV.ATCC.EHN. ML:1.1 0.0001425 0.36 AML other m 2024-04-03T23:20:57.23
IV.ATCC.EHE. ML:1.2 0.000149 1.32 AML other m 2024-04-03T23:20:57.99
IV.MURB.HHE. ML:1.3 0.0001152 0.24 AML other m 2024-04-03T23:21:01.05
IV.MURB.HHN. ML:1.2 0.00010275 0.84 AML other m 2024-04-03T23:21:01.79
IV.MOMA.HHN. ML:0.8 0.0000365 0.3 AML other m 2024-04-03T23:21:02.32
IV.MOMA.HHE. ML:1.0 0.000050100000000000005 0.24 AML other m 2024-04-03T23:21:02.79
IV.NRCA.HHE. ML:1.0 0.000023800000000000003 0.62 AML other m 2024-04-03T23:21:09.73
IV.NRCA.HHN. ML:0.9 0.00001855 0.86 AML other m 2024-04-03T23:21:09.64
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