Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 27-05-2023 and time 17:24:09 (UTC) in region 6 km NE Assisi (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km NE Assisi (PG), on

  • 27-05-2023 17:24:09 (UTC)
  • 27-05-2023 19:24:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1160, 12.6560 at 11 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
Assisi PG 6 28299 28299
Valfabbrica PG 7 3389 31688
Bastia Umbra PG 10 21874 53562
Valtopina PG 10 1398 54960
Nocera Umbra PG 11 5839 60799
Spello PG 14 8645 69444
Cannara PG 15 4305 73749
Gualdo Tadino PG 17 15208 88957
Bettona PG 18 4367 93324
Foligno PG 18 57155 150479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km N of Foligno (57155 inhabitants)
22 Km E of Perugia (166134 inhabitants)
62 Km N of Terni (111501 inhabitants)
74 Km SE of Arezzo (99543 inhabitants)
86 Km SW of Fano (60888 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
91 Km S of Pesaro (94582 inhabitants)
99 Km NW 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 2023-05-27
17:24:09		 43.1157 12.6562 11 2023-05-27
17:35:49		 Sala Sismica INGV-Roma 117787321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-27 17:24:09 ± 0.04
Latitude 43.1157 ± 0.0027
Longitude 12.6562 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117787321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 396
Semi-minor axis of confidence ellipse (meter) 151
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 220
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 26
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38851
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 117787321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-27 17:35:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.SSB3.HHZ.02 2023-05-27T17:24:36.33 3.0 negative manual Pn 0.87 0
IV.OSSC.HHZ. 2023-05-27T17:24:24.06 3.0 undecidable manual Pn 2.16 0
IV.EL6.EHZ. 2023-05-27T17:24:23.92 0.6 undecidable manual S 56 43.1235 50 0.45 44
IV.TB02.DHE.01 2023-05-27T17:24:21.33 0.3 undecidable manual S 325 34.6431 50 0.13 72
IV.ATVO.HHN. 2023-05-27T17:24:21.58 0.6 undecidable manual S 326 35.742 50 0.06 48
IV.TSM2.DHN.01 2023-05-27T17:24:21.01 0.3 undecidable manual S 337 33.9438 50 0 73
IV.TB01.DHE.01 2023-05-27T17:24:21.22 0.3 undecidable manual S 329 34.4433 50 0.05 73
IV.ATLO.EHZ. 2023-05-27T17:24:19.92 0.3 undecidable manual S 318 29.9478 50 -0.03 74
IV.TSM1.DHZ.01 2023-05-27T17:24:18.64 0.3 undecidable manual S 349 25.9518 50 -0.24 71
IV.CESI.HHZ. 2023-05-27T17:24:18.25 0.3 undecidable manual S 121 23.5542 50 -0.01 75
IV.MML1.EHZ. 2023-05-27T17:24:18.77 0.3 undecidable manual S 90 25.5522 50 -0.01 74
IV.MURB.HHZ. 2023-05-27T17:24:17.26 0.3 undecidable manual S 327 19.4694 50 0.09 74
IV.EL6.EHZ. 2023-05-27T17:24:17.86 1.0 undecidable manual P 56 43.1235 50 0.29 23
IV.FOSV.EHZ. 2023-05-27T17:24:17.54 0.3 undecidable manual S 23 21.5673 50 -0.19 72
IV.TB01.DHE.01 2023-05-27T17:24:16.12 0.6 undecidable manual P 329 34.4433 50 -0.11 48
IV.TB02.DHE.01 2023-05-27T17:24:16.33 0.3 undecidable manual P 325 34.6431 50 0.08 72
IV.ATVO.HHN. 2023-05-27T17:24:16.40 0.6 undecidable manual P 326 35.742 50 -0.04 48
IV.TSM2.DHN.01 2023-05-27T17:24:16.11 0.6 undecidable manual P 337 33.9438 50 -0.04 49
IV.ATLO.EHZ. 2023-05-27T17:24:15.34 0.3 undecidable manual P 318 29.9478 50 -0.19 71
IV.ASSB.HHZ. 2023-05-27T17:24:14.17 0.6 undecidable manual S 179 8.0808 144 -0.07 50
IV.CESI.HHZ. 2023-05-27T17:24:14.43 0.6 undecidable manual P 121 23.5542 50 -0.13 49
IV.MML1.EHZ. 2023-05-27T17:24:14.73 0.3 undecidable manual P 90 25.5522 50 -0.13 73
IV.MURB.HHZ. 2023-05-27T17:24:14.02 0.3 positive manual P 327 19.4694 50 0.09 74
IV.TSM1.DHZ.01 2023-05-27T17:24:14.96 0.6 undecidable manual P 349 25.9518 50 0.05 49
IV.ATCC.EHZ. 2023-05-27T17:24:14.08 0.3 undecidable manual S 350 7.7811 145 -0.11 75
IV.FOSV.EHZ. 2023-05-27T17:24:14.31 1.0 negative manual P 23 21.5673 50 0.06 25
IV.ATCC.EHZ. 2023-05-27T17:24:12.33 0.1 undecidable manual P 350 7.7811 145 0.12 100
IV.ASSB.HHZ. 2023-05-27T17:24:12.37 0.6 undecidable manual P 179 8.0808 144 0.13 50
IV.SRES.HHZ. 2023-05-27T17:24:05.61 3.0 undecidable manual P -9.99 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHE. ML:1.2 0.00022700000000000002 0.4 AML other m 2023-05-27T17:24:14.20
IV.ASSB.HHN. ML:0.9 0.0001105 0.34 AML other m 2023-05-27T17:24:14.20
IV.ATCC.EHN. ML:1.2 0.00021800000000000004 0.22 AML other m 2023-05-27T17:24:14.19
IV.ASSB.HHE. ML:0.9 0.00011064999999999999 0.08 AML other m 2023-05-27T17:24:14.41
IV.FOSV.EHN. ML:0.8 0.00004485 1.64 AML other m 2023-05-27T17:24:17.02
IV.FOSV.EHE. ML:1.0 0.0000599 0.2 AML other m 2023-05-27T17:24:17.81
IV.MURB.HHE. ML:1.4 0.00016450000000000001 0.22 AML other m 2023-05-27T17:24:18.16
IV.MURB.HHN. ML:1.3 0.00015500000000000003 0.2 AML other m 2023-05-27T17:24:18.36
IV.MURB.HNE. ML:1.3 0.00013866905 0.2048 AML other m 2023-05-27T17:24:18.17
IV.MURB.HNN. ML:1.2 0.00011732600000000001 0.192 AML other m 2023-05-27T17:24:18.36
IV.CESI.HHE. ML:0.5 0.000019015625 1.7024 AML other m 2023-05-27T17:24:18.80
IV.CESI.HHN. ML:0.2 0.000012005885 0.6656 AML other m 2023-05-27T17:24:19.78
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