Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.3 on date 21-08-2019 and time 23:09:09 (UTC) in region 5 km SW Gualdo Tadino (PG)

A magnitude ML 0.3 earthquake occured in region: 5 km SW Gualdo Tadino (PG), on

  • 21-08-2019 23:09:09 (UTC)
  • 22-08-2019 01:09:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1910, 12.7540 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.

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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
Gualdo Tadino PG 5 15208 15208
Nocera Umbra PG 9 5839 21047
Fossato di Vico PG 12 2840 23887
Valfabbrica PG 13 3389 27276
Fiuminata MC 15 1402 28678
Valtopina PG 15 1398 30076
Sigillo PG 16 2404 32480
Sefro MC 17 422 32902
Esanatoglia MC 17 2034 34936
Assisi PG 17 28299 63235
Pioraco MC 19 1134 64369
Costacciaro PG 19 1216 65585

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km N of Foligno (57155 inhabitants)
31 Km E of Perugia (166134 inhabitants)
71 Km N of Terni (111501 inhabitants)
76 Km S of Fano (60888 inhabitants)
77 Km E of Arezzo (99543 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
81 Km S of Pesaro (94582 inhabitants)
97 Km NW of Teramo (54892 inhabitants)
98 Km S of Rimini (147750 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 0.3 2019-08-21
23:09:09		 43.1908 12.7537 11 2019-08-21
23:17:37		 Sala Sismica INGV-Roma 71687641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-21 23:09:09 ± 0.07
Latitude 43.1908 ± 0.0027
Longitude 12.7537 ± 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 71687641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 276
Semi-minor axis of confidence ellipse (meter) 143
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 17
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 14
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.22033
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.3

Field Value
Value 0.3
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 71687641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-21 23:17:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MNTT.EHZ. 2019-08-21T23:09:31.42 3.0 undecidable manual S -0.51 0
IV.FAGN.HHZ. 2019-08-21T23:09:30.11 3.0 positive manual P -0.04 0
IV.ARVD.HHZ. 2019-08-21T23:09:23.41 3.0 undecidable manual S 0.13 0
IV.ATFO.HHE. 2019-08-21T23:09:18.81 0.3 undecidable manual S 323 24.4533 50 -0.21 71
IV.MML1.EHE. 2019-08-21T23:09:17.54 0.1 undecidable manual S 116 19.6692 118 -0.08 98
IV.MURB.HHE. 2019-08-21T23:09:17.76 0.1 undecidable manual S 293 20.1687 117 -0.03 99
IV.ASSB.HHZ. 2019-08-21T23:09:17.20 0.1 undecidable manual S 205 18.1707 120 0.03 99
IV.SNTG.HHZ. 2019-08-21T23:09:16.80 0.1 undecidable manual S 65 16.6722 122 0.05 99
IV.FOSV.EHZ. 2019-08-21T23:09:15.21 0.1 undecidable manual S 3 11.5773 132 -0.1 99
IV.ATFO.HHE. 2019-08-21T23:09:15.56 0.3 undecidable manual P 323 24.4533 50 0.39 68
IV.MML1.EHE. 2019-08-21T23:09:14.43 0.3 undecidable manual P 116 19.6692 118 0.07 73
IV.MURB.HHE. 2019-08-21T23:09:14.32 0.1 undecidable manual P 293 20.1687 117 -0.14 97
IV.ATCC.EHZ. 2019-08-21T23:09:14.86 0.1 undecidable manual S 266 9.1797 139 0.12 99
IV.ASSB.HHZ. 2019-08-21T23:09:13.92 0.1 undecidable manual P 205 18.1707 120 -0.18 96
IV.FOSV.EHZ. 2019-08-21T23:09:13.06 0.1 undecidable manual P 3 11.5773 132 0.04 100
IV.SNTG.HHZ. 2019-08-21T23:09:13.90 0.6 undecidable manual P 65 16.6722 122 0.05 49
IV.ATCC.EHZ. 2019-08-21T23:09:12.80 0.1 undecidable manual P 266 9.1797 139 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:0.7 0.00006375 1.6 AML other m 2019-08-21T23:09:14.94
IV.ATCC.EHE. ML:0.6 0.00005435 0.28 AML other m 2019-08-21T23:09:15.19
IV.FOSV.EHE. ML:0.2 0.00001766558 0.1408 AML other m 2019-08-21T23:09:15.40
IV.FOSV.EHN. ML:0.3 0.000027139116000000003 0.1408 AML other m 2019-08-21T23:09:15.51
IV.SNTG.HHE. ML:0.1 0.000008860901 0.4608 AML other m 2019-08-21T23:09:17.59
IV.SNTG.HHN. ML:0.1 0.0000113114725 0.128 AML other m 2019-08-21T23:09:17.13
IV.ASSB.HHE. ML:0.1 0.0000123240568 0.1024 AML other m 2019-08-21T23:09:17.71
IV.ASSB.HHN. ML:0.3 0.000016685815 0.0896 AML other m 2019-08-21T23:09:17.75
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