Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 09-02-2021 and time 22:16:35 (Italy) in region 6 km S Gualdo Tadino (PG)

A magnitude ML 1.0 earthquake occured in region: 6 km S Gualdo Tadino (PG), on

  • 09-02-2021 21:16:35 (UTC)
  • 09-02-2021 22:16:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1800, 12.7740 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 6 15208 15208
Nocera Umbra PG 8 5839 21047
Fossato di Vico PG 13 2840 23887
Fiuminata MC 13 1402 25289
Valtopina PG 13 1398 26687
Valfabbrica PG 14 3389 30076
Sefro MC 15 422 30498
Esanatoglia MC 16 2034 32532
Sigillo PG 17 2404 34936
Pioraco MC 17 1134 36070
Assisi PG 18 28299 64369
Serravalle di Chienti MC 19 1070 65439

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km N of Foligno (57155 inhabitants)
32 Km E of Perugia (166134 inhabitants)
70 Km N of Terni (111501 inhabitants)
77 Km S of Fano (60888 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
79 Km E of Arezzo (99543 inhabitants)
82 Km S of Pesaro (94582 inhabitants)
95 Km NW of Teramo (54892 inhabitants)
100 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 1.0 2021-02-09
21:16:35		 43.18 12.7742 10 2021-02-09
21:22:55		 Sala Sismica INGV-Roma 86978781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-09 21:16:35 ± 0.08
Latitude 43.1800 ± 0.0036
Longitude 12.7742 ± 0.0062
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 86978781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 302
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 309
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 154
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39570
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 86978781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-09 21:22:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCEL.HHZ. 2021-02-09T21:18:15.46 3.0 undecidable manual Sn -1.75 0
IX.STN3.HHZ.02 2021-02-09T21:18:15.79 3.0 undecidable manual Sn 4.25 0
IV.PTRJ.HHZ. 2021-02-09T21:17:46.70 3.0 undecidable manual Sn 3.89 0
IV.MILN.HNZ. 2021-02-09T21:17:42.04 3.0 undecidable manual Sg -0.18 0
IV.PTRJ.HNZ. 2021-02-09T21:17:18.01 3.0 undecidable manual Pg 8.72 0
IV.GAVE.EHZ. 2021-02-09T21:17:00.36 3.0 undecidable manual Sn 0.43 0
IV.PIEI.HHZ. 2021-02-09T21:16:50.40 0.3 undecidable manual S 334 43.9227 50 0.25 68
IV.FRON.EHZ. 2021-02-09T21:16:47.95 0.3 undecidable manual S 354 37.629 50 -0.52 65
IV.EL6.EHZ. 2021-02-09T21:16:46.92 0.3 undecidable manual S 58 31.2465 50 0.17 71
IV.PIEI.HHZ. 2021-02-09T21:16:44.21 0.6 undecidable manual P 334 43.9227 50 0.21 46
IV.FRON.EHZ. 2021-02-09T21:16:43.09 0.6 undecidable manual P 354 37.629 50 0.06 48
IV.SNTG.HHZ. 2021-02-09T21:16:42.04 0.6 undecidable manual S 58 15.7731 121 0.05 50
IV.ASSB.HHZ. 2021-02-09T21:16:42.43 0.1 undecidable manual S 212 17.871 118 -0.19 97
IV.EL6.EHZ. 2021-02-09T21:16:41.89 0.3 undecidable manual P 58 31.2465 50 -0.15 72
IV.ATCC.EHZ. 2021-02-09T21:16:40.71 0.1 undecidable manual S 273 10.878 131 0.11 100
IV.FOSV.EHZ. 2021-02-09T21:16:40.90 0.1 undecidable manual S 355 12.7761 126 -0.22 97
IV.SNTG.HHZ. 2021-02-09T21:16:39.39 0.1 undecidable manual P 58 15.7731 121 0.1 99
IV.ASSB.HHZ. 2021-02-09T21:16:39.62 0.1 undecidable manual P 212 17.871 118 -0.04 100
IV.FOSV.EHZ. 2021-02-09T21:16:38.86 0.1 undecidable manual P 355 12.7761 126 0.08 100
IV.ATCC.EHZ. 2021-02-09T21:16:38.65 0.1 positive manual P 273 10.878 131 0.16 99
IV.MTRZ.HHZ. 2021-02-09T21:16:33.25 3.0 undecidable manual P -9.51 0
IV.CPGN.EHZ. 2021-02-09T21:16:28.21 3.0 undecidable manual P -6.86 0
IV.BLLA.EHZ. 2021-02-09T21:16:26.99 3.0 positive manual P -9.99 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:1.3 0.00023400000000000002 0.16 AML other m 2021-02-09T21:16:40.97
IV.ATCC.EHE. ML:1.3 0.000264 0.18 AML other m 2021-02-09T21:16:40.90
IV.SNTG.HHE. ML:0.9 0.00006901391 0.1408 AML other m 2021-02-09T21:16:42.39
IV.SNTG.HHN. ML:0.9 0.00007943985 0.1408 AML other m 2021-02-09T21:16:42.40
IV.FOSV.EHE. ML:0.7 0.000054979664999999996 0.256 AML other m 2021-02-09T21:16:41.17
IV.FOSV.EHN. ML:0.6 0.000046806360000000004 0.2432 AML other m 2021-02-09T21:16:41.77
IV.SNTG.HNE. ML:1.2 0.00015209675000000001 0.7936 AML other m 2021-02-09T21:16:48.73
IV.SNTG.HNN. ML:1.3 0.0001885316 0.5632 AML other m 2021-02-09T21:16:55.62
IV.ASSB.HHE. ML:1.0 0.000082285875 0.192 AML other m 2021-02-09T21:16:42.62
IV.ASSB.HHN. ML:0.9 0.000059978394999999994 0.1792 AML other m 2021-02-09T21:16:43.39
IV.EL6.EHE. ML:1.0 0.000050185219999999997 0.1792 AML other m 2021-02-09T21:16:47.56
IV.EL6.EHN. ML:0.9 0.0000406223675 1.0624 AML other m 2021-02-09T21:17:01.63
IV.FRON.EHE. ML:0.7 0.000018576595 1.3056 AML other m 2021-02-09T21:17:07.56
IV.FRON.EHN. ML:0.6 0.000017193584999999996 0.6272 AML other m 2021-02-09T21:17:01.74
IV.PIEI.HHE. ML:0.7 0.000016048609499999997 0.128 AML other m 2021-02-09T21:16:51.23
IV.PIEI.HHN. ML:1.2 0.000055102435 3.2 AML other m 2021-02-09T21:17:08.99
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