Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 09-08-2021 and time 16:52:47 (Italy) in region 7 km SE Gualdo Tadino (PG)

A magnitude ML 0.8 earthquake occured in region: 7 km SE Gualdo Tadino (PG), on

  • 09-08-2021 14:52:47 (UTC)
  • 09-08-2021 16:52:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1780, 12.8370 at 16 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 7 15208 15208
Fiuminata MC 8 1402 16610
Nocera Umbra PG 8 5839 22449
Sefro MC 10 422 22871
Pioraco MC 12 1134 24005
Esanatoglia MC 12 2034 26039
Fossato di Vico PG 14 2840 28879
Valtopina PG 15 1398 30277
Serravalle di Chienti MC 15 1070 31347
Matelica MC 17 9981 41328
Castelraimondo MC 18 4587 45915
Fabriano AN 19 31480 77395
Sigillo PG 19 2404 79799
Valfabbrica PG 19 3389 83188
Camerino MC 19 6974 90162
Muccia MC 20 915 91077

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Foligno (57155 inhabitants)
37 Km E of Perugia (166134 inhabitants)
70 Km N of Terni (111501 inhabitants)
74 Km SW of Ancona (100861 inhabitants)
76 Km S of Fano (60888 inhabitants)
82 Km S of Pesaro (94582 inhabitants)
84 Km E of Arezzo (99543 inhabitants)
91 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 0.8 2021-08-09
14:52:47		 43.1778 12.8367 16 2021-08-09
15:07:27		 Sala Sismica INGV-Roma 93887191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-09 14:52:47 ± 0.1
Latitude 43.1778 ± 0.0036
Longitude 12.8367 ± 0.0037
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93887191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 437
Semi-minor axis of confidence ellipse (meter) 128
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 34
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28149
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 93887191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-09 15:07:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MILZ.HHZ. 2021-08-09T14:54:20.32 3.0 undecidable manual Pg 15.16 0
OX.CIMO.HHZ. 2021-08-09T14:54:17.25 3.0 undecidable manual Sn 0.25 0
IV.AGLI.HHZ. 2021-08-09T14:54:16.33 3.0 undecidable manual Sn -5.59 0
IV.MRLC.HHZ. 2021-08-09T14:54:16.39 3.0 undecidable manual Sg 0.56 0
IV.CMDO.HHZ. 2021-08-09T14:54:11.95 3.0 undecidable manual Pn -0.36 0
OT.OT05.EHZ. 2021-08-09T14:54:04.73 3.0 undecidable manual Sg 2.75 0
IV.CAVE.HHZ. 2021-08-09T14:53:59.34 3.0 undecidable manual Sg 7.27 0
IV.GIZZ.HHZ. 2021-08-09T14:53:56.24 3.0 negative manual Pn -4.62 0
GU.MGRO.HHZ. 2021-08-09T14:53:43.94 3.0 negative manual Pn -0.95 0
IV.ZEN8.EHZ. 2021-08-09T14:53:34.53 3.0 undecidable manual Pn 1.19 0
IV.TOLF.HHZ. 2021-08-09T14:53:27.00 3.0 undecidable manual S -2.74 0
IV.NDIM.HHZ. 2021-08-09T14:53:24.00 3.0 negative manual Pn 0.02 0
IT.LRNO.HNZ. 2021-08-09T14:53:19.46 3.0 undecidable manual Pn -2.5 0
IV.PESA.HHZ. 2021-08-09T14:53:15.84 3.0 undecidable manual S -0.15 0
IV.CSP1.EHZ. 2021-08-09T14:52:58.74 0.3 undecidable manual S 108 31.2465 104 0.31 91
IV.EL6.EHZ. 2021-08-09T14:52:57.46 0.3 undecidable manual S 52 27.2505 107 0.08 97
IV.MURB.HNZ. 2021-08-09T14:52:57.82 0.6 undecidable manual S 291 26.9508 107 0.51 59
IV.FDMO.HHZ. 2021-08-09T14:52:56.96 0.3 undecidable manual S 128 25.6521 108 -0.02 98
IT.MTCL.HGZ. 2021-08-09T14:52:56.69 0.3 undecidable manual S 147 24.2535 110 0.05 97
IV.CESI.HHZ. 2021-08-09T14:52:55.53 0.3 undecidable manual S 164 19.9689 116 -0.04 98
IV.ASSB.HHZ. 2021-08-09T14:52:55.82 0.3 undecidable manual S 224 20.7681 114 0.04 98
IV.FOSV.HNZ. 2021-08-09T14:52:54.16 0.3 undecidable manual S 335 14.3745 128 -0.14 97
IV.MML1.EHZ. 2021-08-09T14:52:54.04 0.3 undecidable manual S 123 13.0758 131 0.01 100
IV.ATCC.HNZ. 2021-08-09T14:52:54.80 0.3 undecidable manual S 273 15.9729 124 0.16 96
IV.MURB.HNZ. 2021-08-09T14:52:53.21 0.3 undecidable manual P 291 26.9508 107 0.06 97
IV.EL6.EHZ. 2021-08-09T14:52:53.21 0.3 undecidable manual P 52 27.2505 107 0.02 98
IV.FDMO.HHZ. 2021-08-09T14:52:53.12 0.3 undecidable manual P 128 25.6521 108 0.16 95
IV.CSP1.EHZ. 2021-08-09T14:52:53.77 0.3 undecidable manual P 108 31.2465 104 -0.03 96
IV.ASSB.HHZ. 2021-08-09T14:52:52.05 0.3 undecidable manual P 224 20.7681 114 -0.22 95
IT.MTCL.HGZ. 2021-08-09T14:52:52.56 0.3 undecidable manual P 147 24.2535 110 -0.21 94
IV.MML1.EHZ. 2021-08-09T14:52:51.19 0.3 undecidable manual P 123 13.0758 131 -0.07 99
IV.ATCC.HNZ. 2021-08-09T14:52:51.60 0.3 undecidable manual P 273 15.9729 124 -0.01 99
IV.FOSV.HNZ. 2021-08-09T14:52:51.11 0.3 undecidable manual P 335 14.3745 128 -0.3 94
IV.CESI.HHZ. 2021-08-09T14:52:51.98 0.3 undecidable manual P 164 19.9689 116 -0.17 96
IV.MDAR.HNZ. 2021-08-09T14:52:45.32 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHE. ML:0.9 0.00006575 0.36 AML other m 2021-08-09T14:52:54.20
IV.MML1.EHN. ML:0.9 0.00005985 0.16 AML other m 2021-08-09T14:52:54.39
IV.ASSB.HHN. ML:0.8 0.00004045 1.44 AML other m 2021-08-09T14:52:56.25
IV.ASSB.HHE. ML:0.9 0.0000433 0.16 AML other m 2021-08-09T14:52:56.33
IV.FDMO.HHE. ML:0.8 0.000037449999999999995 1.84 AML other m 2021-08-09T14:52:56.07
IV.FDMO.HHN. ML:0.6 0.0000223 0.1 AML other m 2021-08-09T14:52:58.13
IV.EL6.EHE. ML:0.8 0.00003244157 0.1216 AML other m 2021-08-09T14:52:57.92
IV.EL6.EHN. ML:0.8 0.000029549919999999994 0.1216 AML other m 2021-08-09T14:52:58.12
IV.CSP1.EHE. ML:0.7 0.000019954875 0.16 AML other m 2021-08-09T14:52:59.36
IV.CSP1.EHN. ML:1.0 0.00003853024 0.16 AML other m 2021-08-09T14:52:59.54
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