Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 17-02-2021 and time 01:35:18 (Italy) in region 2 km NE Gualdo Tadino (PG)

A magnitude ML 0.8 earthquake occured in region: 2 km NE Gualdo Tadino (PG), on

  • 17-02-2021 00:35:18 (UTC)
  • 17-02-2021 01:35:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2450, 12.8040 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 2 15208 15208
Fossato di Vico PG 7 2840 18048
Sigillo PG 11 2404 20452
Esanatoglia MC 12 2034 22486
Fiuminata MC 12 1402 23888
Fabriano AN 13 31480 55368
Costacciaro PG 15 1216 56584
Nocera Umbra PG 15 5839 62423
Sefro MC 16 422 62845
Pioraco MC 16 1134 63979
Matelica MC 17 9981 73960
Cerreto d'Esi AN 17 3817 77777
Valfabbrica PG 19 3389 81166

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km N of Foligno (57155 inhabitants)
37 Km E of Perugia (166134 inhabitants)
69 Km S of Fano (60888 inhabitants)
71 Km SW of Ancona (100861 inhabitants)
75 Km S of Pesaro (94582 inhabitants)
77 Km N of Terni (111501 inhabitants)
79 Km E of Arezzo (99543 inhabitants)
93 Km S of Rimini (147750 inhabitants)
98 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
Bulletin
Rev1000 		ML 0.8 2021-02-17
00:35:18		 43.2448 12.8043 11 2021-07-12
16:54:59		 Bollettino Sismico Italiano INGV 87276931
Reviewed
Rev100 		ML 0.8 2021-02-17
00:35:18		 43.2332 12.8083 10 2021-02-17
00:46:11		 Sala Sismica INGV-Roma 87223621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-17 00:35:18 ± 0.04
Latitude 43.2448 ± 0.0018
Longitude 12.8043 ± 0.0025
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87276931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 250
Semi-minor axis of confidence ellipse (meter) 217
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 348
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.31296
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 87276931
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-18 14:22:46

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 87223621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-17 00:46:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HNZ. 2021-02-17T00:35:30.17 0.6 undecidable manual S 65 34.743 50 0.14 47
IV.FDMO.HHN. 2021-02-17T00:35:29.44 0.6 undecidable manual S 135 32.5452 50 -0.01 48
IV.CESI.HNZ. 2021-02-17T00:35:28.03 0.6 undecidable manual S 163 27.8499 50 -0.16 47
IV.ASSB.HHZ. 2021-02-17T00:35:27.25 0.1 undecidable manual S 208 25.3524 50 -0.28 93
IV.EL6.EHZ. 2021-02-17T00:35:27.92 0.1 undecidable manual S 69 25.752 50 0.28 93
IV.ATFO.HHZ. 2021-02-17T00:35:27.10 0.6 undecidable manual S 306 23.1546 50 0.16 48
IV.MURB.HHZ. 2021-02-17T00:35:27.04 0.3 undecidable manual S 275 22.6551 50 0.22 71
IV.SSFR.HNZ. 2021-02-17T00:35:26.32 0.3 undecidable manual S 355 21.2676 50 -0.13 72
IV.ATSC.EHZ. 2021-02-17T00:35:26.48 0.6 undecidable manual S 334 22.0668 50 -0.16 48
IV.CING.HNZ. 2021-02-17T00:35:24.91 0.1 undecidable manual P 65 34.743 50 -0.15 94
IV.CESI.HNZ. 2021-02-17T00:35:24.04 0.3 undecidable manual P 163 27.8499 50 0.05 73
IV.ARVD.HHE. 2021-02-17T00:35:24.16 0.6 undecidable manual P 21 30.1476 50 -0.2 47
IV.ATCC.EHZ. 2021-02-17T00:35:24.72 0.1 undecidable manual S 244 14.874 126 0.06 99
IV.FDMO.HHN. 2021-02-17T00:35:24.80 0.3 undecidable manual P 135 32.5452 50 0.08 72
IV.ATFO.HHZ. 2021-02-17T00:35:23.37 0.1 undecidable manual P 306 23.1546 50 0.1 97
IV.MURB.HHZ. 2021-02-17T00:35:23.33 0.1 undecidable manual P 275 22.6551 50 0.13 96
IV.SNTG.HHZ. 2021-02-17T00:35:23.62 0.1 undecidable manual S 84 11.0778 135 -0.04 100
IV.ASSB.HHZ. 2021-02-17T00:35:23.54 0.1 undecidable manual P 208 25.3524 50 -0.07 97
IV.ATSC.EHZ. 2021-02-17T00:35:23.08 0.3 undecidable manual P 334 22.0668 50 -0.02 74
IV.EL6.EHZ. 2021-02-17T00:35:23.72 1.0 positive manual P 69 25.752 50 0.04 24
IV.ATCC.EHZ. 2021-02-17T00:35:22.10 0.1 undecidable manual P 244 14.874 126 0.14 97
IV.FOSV.EHZ. 2021-02-17T00:35:22.46 0.1 undecidable manual S 328 6.5934 149 -0.22 97
IV.SSFR.HNZ. 2021-02-17T00:35:22.78 0.1 undecidable manual P 355 21.2676 50 -0.21 95
IV.SNTG.HHZ. 2021-02-17T00:35:21.47 0.1 undecidable manual P 84 11.0778 135 0.09 99
IV.FOSV.EHZ. 2021-02-17T00:35:20.93 0.1 undecidable manual P 328 6.5934 149 0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHE. ML:0.4 0.000036500000000000006 0.28 AML other m 2021-02-17T00:35:22.79
IV.FOSV.EHN. ML:0.8 0.000088 0.14 AML other m 2021-02-17T00:35:22.74
IV.ATCC.EHN. ML:0.8 0.00006604999999999999 0.16 AML other m 2021-02-17T00:35:25.08
IV.ATCC.EHE. ML:0.8 0.00006075 0.12 AML other m 2021-02-17T00:35:25.01
IV.ASSB.HHN. ML:0.8 0.000034750000000000004 0.52 AML other m 2021-02-17T00:35:27.43
IV.MURB.HHE. ML:1.1 0.00008405 0.38 AML other m 2021-02-17T00:35:27.69
IV.ASSB.HHE. ML:0.6 0.0000249 0.38 AML other m 2021-02-17T00:35:28.16
IV.MURB.HHN. ML:1.0 0.000059800000000000003 1.38 AML other m 2021-02-17T00:35:28.30
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