Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 23-03-2023 and time 21:58:58 (UTC) in region 6 km SE Umbertide (PG)

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

  • 23-03-2023 21:58:58 (UTC)
  • 23-03-2023 22:58:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2780, 12.3830 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
Umbertide PG 6 16681 16681
Montone PG 11 1680 18361
Gubbio PG 18 32216 50577
Corciano PG 18 21332 71909
Pietralunga PG 19 2111 74020
Perugia PG 19 166134 240154
Lisciano Niccone PG 20 613 240767

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km N of Perugia (166134 inhabitants)
44 Km NW of Foligno (57155 inhabitants)
46 Km E of Arezzo (99543 inhabitants)
81 Km SW of Fano (60888 inhabitants)
82 Km SW of Pesaro (94582 inhabitants)
83 Km N of Terni (111501 inhabitants)
85 Km E of Siena (53903 inhabitants)
88 Km S of Rimini (147750 inhabitants)
96 Km S of Cesena (96758 inhabitants)
98 Km N of Viterbo (67173 inhabitants)
99 Km W 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
Reviewed
Rev100 		ML 1.1 2023-03-23
21:58:58		 43.2782 12.3833 9 2023-03-23
22:24:14		 Sala Sismica INGV-Roma 115675091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-23 21:58:58 ± 0.06
Latitude 43.2782 ± 0.0027
Longitude 12.3833 ± 0.0037
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 115675091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 322
Semi-minor axis of confidence ellipse (meter) 274
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.04047
Epicentral distance of station farthest from the epicenter (degree) 0.46765
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 115675091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-23 22:24:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2023-03-23T21:59:10.06 0.6 undecidable manual S 139 34.3434 50 0.04 49
IV.SSFR.HHZ. 2023-03-23T21:59:10.45 0.6 undecidable manual S 61 36.6411 50 -0.19 47
IV.FRON.EHZ. 2023-03-23T21:59:10.85 0.6 undecidable manual S 46 38.3283 50 -0.24 46
IV.PIEI.HHZ. 2023-03-23T21:59:09.19 0.6 undecidable manual S 23 31.0467 50 0.03 49
IV.FOSV.EHZ. 2023-03-23T21:59:08.76 0.6 undecidable manual S 86 30.5472 50 -0.26 47
IV.ATBU.HNE. 2023-03-23T21:59:07.75 0.6 undecidable manual S 31 25.6521 110 0.25 47
IV.CESI.HHZ. 2023-03-23T21:59:07.69 0.6 positive manual P 126 51.9036 50 0.02 47
IV.MGAB.HHZ. 2023-03-23T21:59:06.90 0.6 undecidable manual P 209 46.1205 50 0.13 47
IV.ATCC.EHZ. 2023-03-23T21:59:06.96 0.6 undecidable manual S 116 23.1546 112 0.26 47
IV.ATPC.HHE. 2023-03-23T21:59:06.95 0.6 undecidable manual S 15 23.2545 112 0.23 48
IV.ATPI.EHZ. 2023-03-23T21:59:05.48 0.6 undecidable manual S 5 19.1697 116 0.04 50
IV.SSFR.HHZ. 2023-03-23T21:59:05.07 1.0 undecidable manual P 61 36.6411 50 -0.24 23
IV.ATFO.HHZ. 2023-03-23T21:59:05.29 0.6 undecidable manual S 57 18.0708 117 0.2 48
IV.FRON.EHZ. 2023-03-23T21:59:05.42 1.0 negative manual P 46 38.3283 50 -0.14 24
IV.FOSV.EHZ. 2023-03-23T21:59:04.29 0.6 negative manual P 86 30.5472 50 -0.08 48
IV.TSM2.DHZ. 2023-03-23T21:59:04.35 0.6 undecidable manual S 33 15.6732 121 -0.01 50
IV.ASSB.HHZ. 2023-03-23T21:59:04.70 1.0 undecidable manual P 139 34.3434 50 -0.25 23
IV.PIEI.HHZ. 2023-03-23T21:59:04.68 0.6 undecidable manual P 23 31.0467 50 0.23 47
IV.TB01.DHE.01 2023-03-23T21:59:03.20 0.6 undecidable manual S 20 12.1767 127 -0.17 49
IV.ATPC.HHE. 2023-03-23T21:59:03.27 0.6 undecidable manual P 15 23.2545 112 0.23 48
IV.MURB.HHZ. 2023-03-23T21:59:03.23 0.6 undecidable manual S 98 11.5773 129 0.04 50
IV.ATMI.HHZ. 2023-03-23T21:59:03.02 0.6 undecidable manual S 304 11.1777 130 -0.06 50
IV.ATCC.EHZ. 2023-03-23T21:59:03.07 0.1 positive manual P 116 23.1546 112 0.04 99
IV.ATBU.HNE. 2023-03-23T21:59:03.62 0.3 undecidable manual P 31 25.6521 110 0.12 73
IV.ATFO.HHZ. 2023-03-23T21:59:02.18 1.0 undecidable manual P 57 18.0708 117 0.08 25
IV.ATPI.EHZ. 2023-03-23T21:59:02.39 1.0 negative manual P 5 19.1697 116 0.09 25
IV.ATVO.HHZ. 2023-03-23T21:59:01.06 0.6 positive manual P 9 11.6772 129 0.04 50
IV.TB01.DHE.01 2023-03-23T21:59:01.09 0.3 undecidable manual P 20 12.1767 127 -0.02 76
IV.MURB.HHZ. 2023-03-23T21:59:01.11 0.1 positive manual P 98 11.5773 129 0.11 100
IV.TSM2.DHZ. 2023-03-23T21:59:01.63 0.1 undecidable manual P 33 15.6732 121 -0.05 100
IV.ATMI.HHZ. 2023-03-23T21:59:01.29 0.6 positive manual P 304 11.1777 130 0.34 47
IV.TSM3.DH1.07 2023-03-23T21:59:01.14 0.6 undecidable manual P 349 11.877 128 0.09 50
IV.ATLO.HNN. 2023-03-23T21:59:00.76 0.6 undecidable manual S 25 4.4955 154 -0.88 40
IV.TB02.DHE.01 2023-03-23T21:59:00.82 0.3 undecidable manual P 12 10.4784 132 -0.02 76
IV.ATVA.EHN. 2023-03-23T21:59:00.39 0.3 undecidable manual P 270 7.881 140 -0.09 75
IV.ATLO.HNN. 2023-03-23T21:58:59.85 0.1 undecidable manual P 25 4.4955 154 -0.26 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHE. ML:0.9 0.00010250000000000001 0.52 AML other m 2023-03-23T21:59:03.52
IV.ATMI.HHN. ML:1.1 0.00016450000000000001 1.42 AML other m 2023-03-23T21:59:03.24
IV.ATMI.HHE. ML:1.3 0.00023050000000000002 0.78 AML other m 2023-03-23T21:59:04.25
IV.ATVO.HHN. ML:0.9 0.00009224999999999999 0.46 AML other m 2023-03-23T21:59:05.03
IV.ATFO.HHE. ML:1.2 0.000125 0.68 AML other m 2023-03-23T21:59:05.82
IV.ATPI.EHE. ML:1.0 0.00007975 0.92 AML other m 2023-03-23T21:59:05.88
IV.ATFO.HHN. ML:1.1 0.00009665 1.56 AML other m 2023-03-23T21:59:05.18
IV.ATCC.EHE. ML:1.5 0.00021100000000000003 0.12 AML other m 2023-03-23T21:59:07.27
IV.ATCC.EHN. ML:1.2 0.00010305 0.8 AML other m 2023-03-23T21:59:07.43
IV.ATPI.EHN. ML:0.8 0.0000467 1.58 AML other m 2023-03-23T21:59:09.90
IV.SSFR.HHN. ML:1.3 0.0000736 1.1 AML other m 2023-03-23T21:59:11.95
IV.SSFR.HHE. ML:1.0 0.00003985 0.6 AML other m 2023-03-23T21:59:14.67
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