Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 12-08-2023 and time 11:32:37 (Italy) in region 4 km S Nocera Umbra (PG)

A magnitude ML 0.9 earthquake occured in region: 4 km S Nocera Umbra (PG), on

  • 12-08-2023 09:32:37 (UTC)
  • 12-08-2023 11:32:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0810, 12.8000 at 18 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
Nocera Umbra PG 4 5839 5839
Valtopina PG 4 1398 7237
Serravalle di Chienti MC 13 1070 8307
Spello PG 14 8645 16952
Sefro MC 14 422 17374
Assisi PG 15 28299 45673
Foligno PG 16 57155 102828
Fiuminata MC 16 1402 104230
Gualdo Tadino PG 17 15208 119438
Valfabbrica PG 18 3389 122827
Pioraco MC 19 1134 123961
Monte Cavallo MC 19 145 124106
Cannara PG 20 4305 128411
Muccia MC 20 915 129326

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NE of Foligno (57155 inhabitants)
34 Km E of Perugia (166134 inhabitants)
59 Km N of Terni (111501 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
86 Km SE of Arezzo (99543 inhabitants)
87 Km S of Fano (60888 inhabitants)
87 Km NW of Teramo (54892 inhabitants)
93 Km S of Pesaro (94582 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
95 Km NW of L'Aquila (69753 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 2023-08-12
09:32:37		 43.0808 12.7998 18 2023-08-12
09:39:55		 Sala Sismica INGV-Roma 120050491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-12 09:32:37 ± 0.27
Latitude 43.0808 ± 0.0117
Longitude 12.7998 ± 0.0123
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 120050491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1261
Semi-minor axis of confidence ellipse (meter) 768
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 199
Circular confidence region, given by single value of horizontal uncertainty (meter) 1260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33725
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 120050491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-12 09:39:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTRA.HNZ. 2023-08-12T09:32:56.51 3.0 undecidable manual Sn -0.56 0
IV.NRCA.HHZ. 2023-08-12T09:32:51.20 0.6 undecidable manual S 137 37.4292 104 0.61 42
IV.MMO1.EHZ. 2023-08-12T09:32:50.55 3.0 undecidable manual S -3 0
IV.CSP1.EHZ. 2023-08-12T09:32:49.88 0.3 undecidable manual S 88 32.8449 107 0.48 66
IV.SNTG.HHZ. 2023-08-12T09:32:46.37 0.6 undecidable manual S 30 22.4553 118 -0.45 45
IT.MTCL.HGZ. 2023-08-12T09:32:46.18 0.6 undecidable manual S 121 18.87 124 0.18 48
IV.FDMO.HHZ. 2023-08-12T09:32:46.74 0.3 undecidable manual S 102 23.754 116 -0.42 68
IV.ATCC.EHZ. 2023-08-12T09:32:45.54 0.6 undecidable manual S 312 17.3715 127 -0.14 49
IV.ASSB.HHZ. 2023-08-12T09:32:44.45 0.6 undecidable manual S 250 12.1767 139 -0.22 49
IV.MML1.EHZ. 2023-08-12T09:32:44.85 0.6 undecidable manual S 75 14.3745 133 -0.22 48
IV.CSP1.EHZ. 2023-08-12T09:32:44.03 0.1 undecidable manual P 88 32.8449 107 -0.51 87
IV.NRCA.HHZ. 2023-08-12T09:32:44.73 0.1 undecidable manual P 137 37.4292 104 -0.5 86
IV.FDMO.HHZ. 2023-08-12T09:32:43.42 0.1 undecidable manual P 102 23.754 116 0.17 95
IV.SNTG.HHZ. 2023-08-12T09:32:43.71 0.1 undecidable manual P 30 22.4553 118 0.65 83
IT.MTCL.HGZ. 2023-08-12T09:32:42.76 0.1 undecidable manual P 121 18.87 124 0.18 96
IV.MML1.EHZ. 2023-08-12T09:32:42.04 0.1 undecidable manual P 75 14.3745 133 -0.01 100
IV.ATCC.EHZ. 2023-08-12T09:32:42.46 0.1 undecidable manual P 312 17.3715 127 0.06 98
IV.ASSB.HHZ. 2023-08-12T09:32:41.87 0.1 positive manual P 250 12.1767 139 0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.2 0.0001145 0.2 AML other m 2023-08-12T09:32:44.61
IV.MML1.EHN. ML:0.8 0.00004635 0.14 AML other m 2023-08-12T09:32:45.08
IV.MML1.EHE. ML:1.0 0.00007189999999999999 0.3 AML other m 2023-08-12T09:32:45.00
IV.ASSB.HHN. ML:1.1 0.00009384999999999999 0.96 AML other m 2023-08-12T09:32:45.72
IV.FDMO.HHE. ML:0.8 0.0000288 0.86 AML other m 2023-08-12T09:32:47.55
IV.FDMO.HHN. ML:0.7 0.000025849999999999998 0.6 AML other m 2023-08-12T09:32:47.63
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