Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 21-02-2021 and time 15:07:50 (Italy) in region 4 km SE Pietralunga (PG)

A magnitude ML 0.9 earthquake occured in region: 4 km SE Pietralunga (PG), on

  • 21-02-2021 14:07:50 (UTC)
  • 21-02-2021 15:07:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4090, 12.4620 at 5 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
Pietralunga PG 4 2111 2111
Gubbio PG 11 32216 34327
Montone PG 12 1680 36007
Cantiano PU 15 2245 38252
Umbertide PG 16 16681 54933
Scheggia e Pascelupo PG 17 1393 56326
Apecchio PU 17 1882 58208
Città di Castello PG 19 39913 98121

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km N of Perugia (166134 inhabitants)
47 Km E of Arezzo (99543 inhabitants)
54 Km NW of Foligno (57155 inhabitants)
66 Km SW of Fano (60888 inhabitants)
67 Km SW of Pesaro (94582 inhabitants)
73 Km S of Rimini (147750 inhabitants)
83 Km S of Cesena (96758 inhabitants)
88 Km W of Ancona (100861 inhabitants)
92 Km E of Siena (53903 inhabitants)
95 Km N of Terni (111501 inhabitants)
97 Km SE of Forlì (117913 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 0.9 2021-02-21
14:07:50		 43.4087 12.4618 5 2021-02-21
14:20:41		 Sala Sismica INGV-Roma 87356411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-21 14:07:50 ± 0.14
Latitude 43.4087 ± 0.0027
Longitude 12.4618 ± 0.0050
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87356411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 286
Semi-minor axis of confidence ellipse (meter) 245
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 136
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.16368
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 5
Type of magnitude ML
Reference to an origin 87356411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-21 14:20:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ESCV.HHZ. 2021-02-21T14:09:34.20 3.0 positive manual Pg 20.799999 0
IV.SELL.HHZ. 2021-02-21T14:09:25.68 3.0 positive manual Pg 17.379999 0
IV.MILZ.HHZ. 2021-02-21T14:09:23.36 3.0 undecidable manual Pg 14.68 0
IV.MFNL.HHZ. 2021-02-21T14:09:20.76 3.0 undecidable manual Pg 13.66 0
IV.BSSO.HHZ. 2021-02-21T14:09:19.13 3.0 undecidable manual Sg 10.94 0
IV.SOI.EHZ. 2021-02-21T14:09:10.05 3.0 negative manual Pn -5.23 0
IV.PTRJ.HHZ. 2021-02-21T14:09:03.59 3.0 undecidable manual Sn -7.02 0
IV.RNI2.HHZ. 2021-02-21T14:09:02.96 3.0 undecidable manual Sg 3.14 0
IV.SLCN.HHZ. 2021-02-21T14:08:55.91 3.0 undecidable manual Pg 9.26 0
IV.USI.HHZ. 2021-02-21T14:08:55.42 3.0 undecidable manual Pn 0.04 0
GU.IMI.HHZ. 2021-02-21T14:08:55.21 3.0 undecidable manual Sn 3.08 0
IV.MTMR.EHZ. 2021-02-21T14:08:50.20 3.0 undecidable manual Pg 13.35 0
IT.GNV.HGZ. 2021-02-21T14:08:40.78 3.0 undecidable manual Sg 4.67 0
IV.CIGN.HHZ. 2021-02-21T14:08:34.47 3.0 positive manual Pg 5.49 0
IV.VVLD.HHZ. 2021-02-21T14:08:22.09 3.0 undecidable manual Pg 4.41 0
IT.GNV.HGZ. 2021-02-21T14:08:07.88 3.0 negative manual Pn -1.76 0
IV.CELB.HHZ. 2021-02-21T14:08:04.70 3.0 undecidable manual P 2.35 0
IV.GAVE.EHZ. 2021-02-21T14:08:02.73 3.0 undecidable manual P -1.56 0
GU.CARD.HHZ. 2021-02-21T14:08:00.58 3.0 undecidable manual S -3.23 0
IV.MURB.HHZ. 2021-02-21T14:07:57.56 0.1 undecidable manual S 163 16.9719 107 0.41 90
IV.ATSC.EHE. 2021-02-21T14:07:57.50 0.3 undecidable manual S 85 18.1707 106 -0.06 73
IV.PIEI.HHZ. 2021-02-21T14:07:56.79 0.3 undecidable manual S 23 15.2736 109 0.19 71
IV.ATBU.EHN. 2021-02-21T14:07:55.27 0.1 undecidable manual S 43 10.1787 118 0.29 94
IV.PIEI.HHZ. 2021-02-21T14:07:54.18 0.1 undecidable manual P 23 15.2736 109 -0.05 98
IV.ATSC.EHE. 2021-02-21T14:07:54.55 0.3 undecidable manual P 85 18.1707 106 -0.23 70
IV.MURB.HHZ. 2021-02-21T14:07:54.80 0.3 undecidable manual P 163 16.9719 107 0.26 70
IV.ATPC.HNN. 2021-02-21T14:07:54.52 0.3 undecidable manual S 357 7.9809 124 0.2 72
IV.ATFO.HHZ. 2021-02-21T14:07:54.80 0.1 undecidable manual S 118 9.9789 118 -0.11 98
IV.ATVO.HHZ. 2021-02-21T14:07:53.65 0.1 undecidable manual S 237 5.3946 135 0.05 100
IV.ATPI.EHZ. 2021-02-21T14:07:53.96 0.3 undecidable manual S 314 6.6933 128 0.01 75
IV.TB01.DHZ. 2021-02-21T14:07:53.12 0.1 undecidable manual S 215 3.6963 145 -0.11 99
IV.ATBU.EHN. 2021-02-21T14:07:53.20 0.1 undecidable manual P 43 10.1787 118 -0.09 98
IV.TB03.DHZ.01 2021-02-21T14:07:53.31 0.1 undecidable manual S 259 4.1958 141 -0.04 100
IV.ATFO.HHZ. 2021-02-21T14:07:52.92 0.1 undecidable manual P 118 9.9789 118 -0.33 93
IV.TB03.DHZ.01 2021-02-21T14:07:52.25 0.1 undecidable manual P 259 4.1958 141 -0.1 99
IV.TB02.DHN.01 2021-02-21T14:07:52.80 0.3 undecidable manual P 225 5.994 132 0.21 72
IV.ATVO.HHZ. 2021-02-21T14:07:52.44 0.1 undecidable manual P 237 5.3946 135 -0.06 99
IV.ATPI.EHZ. 2021-02-21T14:07:52.73 0.1 undecidable manual P 314 6.6933 128 0.03 100
IV.TB01.DHZ. 2021-02-21T14:07:52.19 0.1 undecidable manual P 215 3.6963 145 -0.09 99
IV.ATPC.HNN. 2021-02-21T14:07:52.74 0.1 undecidable manual P 357 7.9809 124 -0.17 97
GU.GSCL.HHZ. 2021-02-21T14:07:50.66 3.0 undecidable manual P -2.59 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHE. ML:0.0 0.000047899145 0.1216 AML other m 2021-02-21T14:07:53.75
IV.SSFR.HNN. ML:1.8 0.0003345 0.56 AML other m 2021-02-21T14:08:21.44
IV.SSFR.HHN. ML:1.5 0.00018099999999999998 0.56 AML other m 2021-02-21T14:08:22.53
IV.SSFR.HNE. ML:1.9 0.0005195000000000001 1.42 AML other m 2021-02-21T14:08:23.86
IV.ATPI.EHE. ML:0.0 0.000014786948 0.16 AML other m 2021-02-21T14:07:54.56
IV.ATPI.EHN. ML:0.0 0.00003766698 0.1024 AML other m 2021-02-21T14:07:54.08
IV.ATPI.HNE. ML:0.0 0.000071875795 0.5504 AML other m 2021-02-21T14:07:54.75
IV.ATPI.HNN. ML:0.0 0.00014368245000000003 0.672 AML other m 2021-02-21T14:07:54.16
IV.MURB.HNE. ML:1.1 0.0001175994 0.3584 AML other m 2021-02-21T14:07:58.03
IV.MURB.HNN. ML:0.9 0.000072591065 0.2752 AML other m 2021-02-21T14:07:58.22
IV.MURB.HHE. ML:0.7 0.0000458418 0.2432 AML other m 2021-02-21T14:07:58.06
IV.MURB.HHN. ML:0.6 0.000033179215 0.1984 AML other m 2021-02-21T14:07:58.21
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