Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 16-05-2021 and time 14:04:35 (Italy) in region 3 km N Gualdo Tadino (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km N Gualdo Tadino (PG), on

  • 16-05-2021 12:04:35 (UTC)
  • 16-05-2021 14:04:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2570, 12.7950 at 9 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 3 15208 15208
Fossato di Vico PG 5 2840 18048
Sigillo PG 9 2404 20452
Esanatoglia MC 12 2034 22486
Fabriano AN 13 31480 53966
Costacciaro PG 13 1216 55182
Fiuminata MC 13 1402 56584
Nocera Umbra PG 16 5839 62423
Cerreto d'Esi AN 17 3817 66240
Matelica MC 17 9981 76221
Sefro MC 18 422 76643
Pioraco MC 18 1134 77777
Valfabbrica PG 19 3389 81166
Scheggia e Pascelupo PG 19 1393 82559

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km N of Foligno (57155 inhabitants)
37 Km E of Perugia (166134 inhabitants)
68 Km S of Fano (60888 inhabitants)
71 Km SW of Ancona (100861 inhabitants)
73 Km S of Pesaro (94582 inhabitants)
77 Km E of Arezzo (99543 inhabitants)
78 Km N of Terni (111501 inhabitants)
91 Km S of Rimini (147750 inhabitants)
100 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 1.0 2021-05-16
12:04:35		 43.2573 12.7953 9 2021-05-16
12:23:46		 Sala Sismica INGV-Roma 90163091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-16 12:04:35 ± 0.1
Latitude 43.2573 ± 0.0036
Longitude 12.7953 ± 0.0074
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90163091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 596
Semi-minor axis of confidence ellipse (meter) 173
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 116
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.33635
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 90163091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-16 12:23:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2021-05-16T12:04:48.12 0.1 undecidable manual S 326 37.3293 50 -0.25 90
IV.ARVD.HHZ. 2021-05-16T12:04:46.35 0.1 undecidable manual S 24 29.1486 108 0.18 92
IV.ASSB.HHZ. 2021-05-16T12:04:45.12 0.3 undecidable manual S 205 26.2515 109 -0.08 71
IV.MURB.HHZ. 2021-05-16T12:04:43.87 0.1 undecidable manual S 272 21.867 113 0.09 95
IV.SSFR.HHZ. 2021-05-16T12:04:43.27 0.3 undecidable manual S 357 19.869 115 0.12 71
IV.PIEI.HHZ. 2021-05-16T12:04:42.78 1.0 positive manual P 326 37.3293 50 -0.17 23
IV.ARVD.HHZ. 2021-05-16T12:04:41.77 0.1 negative manual P 24 29.1486 108 0.09 94
IV.CESI.HHN. 2021-05-16T12:04:41.55 0.3 undecidable manual P 162 29.3484 107 -0.16 70
IV.ATCC.EHZ. 2021-05-16T12:04:41.78 0.1 undecidable manual S 238 14.874 122 0.16 95
IV.ASSB.HHZ. 2021-05-16T12:04:41.05 0.1 positive manual P 205 26.2515 109 -0.07 95
IV.SSFR.HHZ. 2021-05-16T12:04:40.08 0.3 negative manual P 357 19.869 115 0.14 71
IV.MURB.HHZ. 2021-05-16T12:04:40.63 0.6 negative manual P 272 21.867 113 0.33 45
IV.ATCC.EHZ. 2021-05-16T12:04:39.24 0.1 positive manual P 238 14.874 122 0.18 95
IV.FOSV.EHZ. 2021-05-16T12:04:38.63 0.1 undecidable manual S 326 4.995 152 -0.56 88
IV.FOSV.EHZ. 2021-05-16T12:04:37.65 0.1 undecidable manual P 326 4.995 152 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHE. ML:1.2 0.000322 0.14 AML other m 2021-05-16T12:04:38.75
IV.FOSV.EHN. ML:1.3 0.0003375 0.3 AML other m 2021-05-16T12:04:38.85
IV.ATCC.EHN. ML:0.8 0.00006575 0.32 AML other m 2021-05-16T12:04:41.95
IV.ATCC.EHE. ML:0.7 0.00004935 0.28 AML other m 2021-05-16T12:04:41.78
IV.SSFR.HHE. ML:1.0 0.00008135000000000001 0.24 AML other m 2021-05-16T12:04:43.63
IV.SSFR.HHN. ML:1.2 0.0001081 0.28 AML other m 2021-05-16T12:04:43.75
IV.MURB.HHN. ML:1.2 0.000113 0.24 AML other m 2021-05-16T12:04:44.03
IV.MURB.HHE. ML:1.3 0.000126 0.26 AML other m 2021-05-16T12:04:44.29
IV.ASSB.HHE. ML:0.7 0.00003065 0.58 AML other m 2021-05-16T12:04:46.82
IV.ASSB.HHN. ML:0.8 0.00003315 0.42 AML other m 2021-05-16T12:04:46.63
IV.PIEI.HHN. ML:0.9 0.0000295 1.34 AML other m 2021-05-16T12:04:48.84
IV.PIEI.HHE. ML:0.8 0.00002595 1.38 AML other m 2021-05-16T12:04:48.29
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