Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 09-04-2021 and time 04:43:44 (Italy) in region 4 km NW Gualdo Tadino (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km NW Gualdo Tadino (PG), on

  • 09-04-2021 02:43:44 (UTC)
  • 09-04-2021 04:43:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2620, 12.7710 at 12 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 4 15208 15208
Fossato di Vico PG 4 2840 18048
Sigillo PG 8 2404 20452
Costacciaro PG 12 1216 21668
Fabriano AN 14 31480 53148
Esanatoglia MC 14 2034 55182
Fiuminata MC 15 1402 56584
Nocera Umbra PG 17 5839 62423
Valfabbrica PG 18 3389 65812
Scheggia e Pascelupo PG 18 1393 67205
Gubbio PG 19 32216 99421
Cerreto d'Esi AN 19 3817 103238
Sefro MC 19 422 103660
Matelica MC 19 9981 113641
Pioraco MC 20 1134 114775

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km N of Foligno (57155 inhabitants)
35 Km E of Perugia (166134 inhabitants)
68 Km SW of Fano (60888 inhabitants)
72 Km SW of Ancona (100861 inhabitants)
73 Km S of Pesaro (94582 inhabitants)
75 Km E of Arezzo (99543 inhabitants)
79 Km N of Terni (111501 inhabitants)
91 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 2021-04-09
02:43:44		 43.2618 12.7713 12 2021-04-09
02:50:52		 Sala Sismica INGV-Roma 88926741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-09 02:43:44 ± 0.03
Latitude 43.2618 ± 0.0018
Longitude 12.7713 ± 0.0025
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88926741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 188
Semi-minor axis of confidence ellipse (meter) 186
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
Circular confidence region, given by single value of horizontal uncertainty (meter) 190.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32825
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 35
Type of magnitude ML
Reference to an origin 88926741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-09 02:50:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-04-09T02:43:54.40 3.0 negative manual P 0.01 0
IV.MPAG.EHZ. 2021-04-09T02:43:52.19 3.0 positive manual P 0.03 0
IV.NARO.HHZ. 2021-04-09T02:43:52.10 3.0 positive manual P -0.14 0
IV.FDMO.HHZ. 2021-04-09T02:43:51.36 1.0 undecidable manual P 134 35.742 92 0.03 24
IV.PIEI.HHZ. 2021-04-09T02:43:51.19 3.0 undecidable manual P -0.1 0
IV.ATPI.EHZ. 2021-04-09T02:43:51.48 0.6 negative manual P 305 36.4413 92 0.05 48
IV.ATSC.EHZ. 2021-04-09T02:43:51.82 0.3 undecidable manual S 339 19.2696 96 -0.18 72
IV.FRON.EHZ. 2021-04-09T02:43:50.04 3.0 positive manual P -0.23 0
IV.ATBU.HNZ. 2021-04-09T02:43:50.52 0.6 undecidable manual P 323 29.748 92 0.11 48
IV.CESI.HHZ. 2021-04-09T02:43:50.42 1.0 negative manual P 159 30.4473 92 -0.1 24
IV.ATLO.EHZ. 2021-04-09T02:43:50.43 0.6 undecidable manual P 281 29.9478 92 -0.01 49
IV.ATCC.EHZ. 2021-04-09T02:43:50.56 0.3 undecidable manual S 231 13.5753 109 0.03 75
IV.EL6.EHZ. 2021-04-09T02:43:50.34 0.6 negative manual P 74 27.6501 93 0.25 47
IV.FIU1.HNZ. 2021-04-09T02:43:50.93 0.6 undecidable manual S 122 15.2736 103 -0.03 50
IV.SNTG.HHZ. 2021-04-09T02:43:50.52 0.6 undecidable manual S 93 13.6752 109 -0.03 50
IV.ARVD.HHZ. 2021-04-09T02:43:50.46 3.0 negative manual P -0.05 0
IV.ASSB.HHZ. 2021-04-09T02:43:49.68 0.1 positive manual P 201 25.9518 93 -0.15 96
IV.MML1.HNZ. 2021-04-09T02:43:49.41 0.6 undecidable manual P 135 23.0547 94 0.03 50
IV.MURB.HHZ. 2021-04-09T02:43:48.94 0.1 positive manual P 270 19.9689 96 0.04 99
IV.SNTG.HHZ. 2021-04-09T02:43:48.08 0.1 undecidable manual P 93 13.6752 109 0.13 99
IV.ATSC.EHZ. 2021-04-09T02:43:48.73 0.3 undecidable manual P 339 19.2696 96 -0.06 74
IV.FOSV.EHZ. 2021-04-09T02:43:48.54 0.3 undecidable manual S 347 3.7962 157 -0.08 77
IV.ATFO.HHZ. 2021-04-09T02:43:48.88 0.1 positive manual P 306 19.869 96 -0.01 100
IV.SSFR.HNZ. 2021-04-09T02:43:48.85 0.1 undecidable manual P 3 19.3695 96 0.04 100
IV.ATCC.EHZ. 2021-04-09T02:43:47.99 0.6 undecidable manual P 231 13.5753 109 0.05 50
IV.FIU1.HNZ. 2021-04-09T02:43:47.81 1.0 undecidable manual P 122 15.2736 103 -0.38 23
IV.FOSV.EHZ. 2021-04-09T02:43:46.86 1.0 undecidable manual P 347 3.7962 157 0.02 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHE. ML:0.9 0.0001155249 0.1808 AML other m 2021-04-09T02:43:48.68
IV.FOSV.EHN. ML:1.1 0.00018449999999999999 0.1 AML other m 2021-04-09T02:43:48.69
IV.ATCC.EHN. ML:1.2 0.00016800000000000002 0.16 AML other m 2021-04-09T02:43:50.61
IV.ATCC.EHE. ML:1.3 0.00017998704 0.1392 AML other m 2021-04-09T02:43:50.73
IV.MURB.HHE. ML:1.5 0.0002355 0.22 AML other m 2021-04-09T02:43:52.71
IV.MURB.HHN. ML:1.3 0.00013591744999999998 0.2 AML other m 2021-04-09T02:43:52.80
IV.ASSB.HHN. ML:1.0 0.00004912776 0.0592 AML other m 2021-04-09T02:43:54.06
IV.ASSB.HHE. ML:1.0 0.0000586 1.18 AML other m 2021-04-09T02:43:54.91
IV.ARVD.HHN. ML:0.8 0.000031119815 0.0816 AML other m 2021-04-09T02:43:55.26
IV.ARVD.HHE. ML:0.9 0.000038206795 0.08 AML other m 2021-04-09T02:43:55.09
IV.FRON.EHE. ML:1.0 0.000053409255 0.0816 AML other m 2021-04-09T02:43:55.44
IV.FRON.EHN. ML:1.1 0.00006726743 0.08 AML other m 2021-04-09T02:43:55.17
IV.SNTG.HHN. ML:1.0 0.000085953455 0.1408 AML other m 2021-04-09T02:43:50.89
IV.SNTG.HNE. ML:1.1 0.00012233720000000002 0.52 AML other m 2021-04-09T02:43:51.12
IV.SNTG.HNN. ML:1.3 0.00020844950000000002 0.4496 AML other m 2021-04-09T02:43:50.82
IV.ATFO.HHN. ML:0.9 0.000054491915 0.0816 AML other m 2021-04-09T02:43:52.52
IV.ATFO.HHE. ML:1.0 0.00007310174 0.16 AML other m 2021-04-09T02:43:52.50
IV.MURB.HNN. ML:1.2 0.00011993429999999999 0.2496 AML other m 2021-04-09T02:43:53.45
IV.MURB.HNE. ML:1.5 0.00023314275 0.2096 AML other m 2021-04-09T02:43:52.71
IV.EL6.EHN. ML:0.9 0.00004561449500000001 0.1792 AML other m 2021-04-09T02:43:55.61
IV.EL6.EHE. ML:0.8 0.0000315745325 0.0992 AML other m 2021-04-09T02:43:55.08
IV.CESI.HHN. ML:0.3 0.0000108687075 0.12 AML other m 2021-04-09T02:43:56.63
IV.CESI.HNE. ML:1.4 0.00010826729999999999 0.9296 AML other m 2021-04-09T02:44:06.71
IV.CESI.HNN. ML:1.5 0.00014963512000000002 0.8 AML other m 2021-04-09T02:44:00.34
IV.CESI.HHE. ML:0.3 0.000012071263500000001 0.0816 AML other m 2021-04-09T02:43:56.60
IV.PIEI.HHN. ML:0.6 0.000016782140000000003 0.1808 AML other m 2021-04-09T02:43:56.99
IV.PIEI.HHE. ML:1.0 0.000041467525 0.2 AML other m 2021-04-09T02:43:57.19
IV.FDMO.HHN. ML:0.6 0.000012567978 0.1392 AML other m 2021-04-09T02:43:57.34
IV.FDMO.HHE. ML:0.6 0.00001593295 0.12 AML other m 2021-04-09T02:43:57.93
IV.ATPI.EHN. ML:0.6 0.00001513171 0.48 AML other m 2021-04-09T02:43:57.01
IV.ATPI.HNE. ML:1.5 0.00012537452 1.3008 AML other m 2021-04-09T02:44:07.38
IV.ATPI.HNN. ML:1.5 0.00011563785500000002 0.52 AML other m 2021-04-09T02:44:02.16
IV.ATPI.EHE. ML:0.7 0.00002069412 0.4992 AML other m 2021-04-09T02:43:56.81
IV.NARO.HHN. ML:0.7 0.000012574430000000002 0.0592 AML other m 2021-04-09T02:44:00.52
IV.NARO.HHE. ML:0.7 0.00001555003 0.12 AML other m 2021-04-09T02:43:58.45
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