Earthquake with magnitude of ML 0.9 on date 20-09-2023 and time 22:19:49 (UTC) in region 6 km N Nocera Umbra (PG)

A magnitude ML 0.9 earthquake occured in region: 6 km N Nocera Umbra (PG), on

  • 20-09-2023 22:19:49 (UTC)
  • 21-09-2023 00:19:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1690, 12.7790 at 10 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Nocera Umbra PG 7 5839 5839
Gualdo Tadino PG 7 15208 21047
Valtopina PG 12 1398 22445
Fiuminata MC 13 1402 23847
Sefro MC 14 422 24269
Fossato di Vico PG 14 2840 27109
Valfabbrica PG 14 3389 30498
Esanatoglia MC 17 2034 32532
Pioraco MC 17 1134 33666
Assisi PG 17 28299 61965
Serravalle di Chienti MC 18 1070 63035
Sigillo PG 18 2404 65439

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km N of Foligno (57155 inhabitants)
32 Km E of Perugia (166134 inhabitants)
68 Km N of Terni (111501 inhabitants)
78 Km S of Fano (60888 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
80 Km E of Arezzo (99543 inhabitants)
83 Km S of Pesaro (94582 inhabitants)
94 Km NW of Teramo (54892 inhabitants)
100 Km NE of Viterbo (67173 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 2023-09-20
22:19:49
43.1693 12.7787 10 2023-09-20
22:25:43
Sala Sismica INGV-Roma 121288311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-20 22:19:49 ± 0.04
Latitude 43.1693 ± 0.0018
Longitude 12.7787 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121288311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 174
Semi-minor axis of confidence ellipse (meter) 172
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 36
Circular confidence region, given by single value of horizontal uncertainty (meter) 170.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0.10252
Epicentral distance of station farthest from the epicenter (degree) 0.40649
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 121288311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-20 22:25:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATVO.HHZ. 2023-09-20T22:20:02.02 0.6 undecidable manual S 308 38.2284 50 0.1 48
IV.FRON.EHZ. 2023-09-20T22:20:01.89 0.6 undecidable manual S 354 38.8278 50 -0.22 46
IV.ATMI.HHZ. 2023-09-20T22:20:00.14 3.0 negative manual P 45.1215 2.56 0
IV.MURB.HHZ. 2023-09-20T22:19:58.06 0.6 undecidable manual S 297 23.0547 50 0.19 47
IV.ATVO.HHZ. 2023-09-20T22:19:56.49 1.0 undecidable manual P 308 38.2284 50 -0.02 24
IV.FRON.EHZ. 2023-09-20T22:19:56.68 1.0 undecidable manual P 354 38.8278 50 0.06 24
IV.MML1.EHZ. 2023-09-20T22:19:56.00 0.6 undecidable manual S 112 16.7721 122 0.03 50
IV.ASSB.HHZ. 2023-09-20T22:19:55.96 0.6 undecidable manual S 215 17.0718 121 -0.1 49
IV.FOSV.EHZ. 2023-09-20T22:19:55.02 0.6 undecidable manual S 354 13.9749 127 -0.14 50
IV.SNTG.HHZ. 2023-09-20T22:19:55.78 0.6 undecidable manual S 54 16.1727 123 0 50
IV.ATCC.EHZ. 2023-09-20T22:19:54.30 0.6 undecidable manual S 279 11.3775 132 -0.16 50
IV.MURB.HHZ. 2023-09-20T22:19:54.19 0.3 positive manual P 297 23.0547 50 0.02 74
IV.SNTG.HHZ. 2023-09-20T22:19:53.10 0.3 positive manual P 54 16.1727 123 0.13 73
IV.ASSB.HHZ. 2023-09-20T22:19:53.11 0.1 positive manual P 215 17.0718 121 -0.02 100
IV.MML1.EHZ. 2023-09-20T22:19:52.95 1.0 undecidable manual P 112 16.7721 122 -0.12 24
IV.ATCC.EHZ. 2023-09-20T22:19:52.27 0.1 negative manual P 279 11.3775 132 0.07 99
IV.FOSV.EHZ. 2023-09-20T22:19:52.60 0.3 undecidable manual P 354 13.9749 127 0 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:1.0 0.00013000000000000002 0.12 AML other m 2023-09-20T22:19:54.38
IV.ATCC.EHE. ML:0.9 0.00009545 0.12 AML other m 2023-09-20T22:19:54.43
IV.FOSV.EHE. ML:0.7 0.00005515 0.18 AML other m 2023-09-20T22:19:55.15
IV.FOSV.EHN. ML:0.9 0.00007929999999999999 0.46 AML other m 2023-09-20T22:19:55.18
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