Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 22-05-2021 and time 02:30:30 (Italy) in region 7 km W Pietralunga (PG)

A magnitude ML 0.6 earthquake occured in region: 7 km W Pietralunga (PG), on

  • 22-05-2021 00:30:30 (UTC)
  • 22-05-2021 02:30:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4400, 12.3560 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.

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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 7 2111 2111
Montone PG 9 1680 3791
Città di Castello PG 10 39913 43704
Apecchio PU 14 1882 45586
Umbertide PG 15 16681 62267
Monte Santa Maria Tiberina PG 16 1183 63450
San Giustino PG 19 11297 74747

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km N of Perugia (166134 inhabitants)
38 Km E of Arezzo (99543 inhabitants)
61 Km NW of Foligno (57155 inhabitants)
69 Km SW of Pesaro (94582 inhabitants)
70 Km SW of Fano (60888 inhabitants)
71 Km S of Rimini (147750 inhabitants)
78 Km S of Cesena (96758 inhabitants)
84 Km E of Siena (53903 inhabitants)
91 Km S of Forlì (117913 inhabitants)
96 Km E of Firenze (382808 inhabitants)
96 Km W of Ancona (100861 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 0.6 2021-05-22
00:30:30		 43.44 12.3562 9 2021-05-22
00:41:58		 Sala Sismica INGV-Roma 90356081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-22 00:30:30 ± 0.07
Latitude 43.4400 ± 0.0018
Longitude 12.3562 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90356081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 22
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 271
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) 62
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 34
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) 0.32825
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 18
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 90356081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-22 00:41:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATCC.HNZ. 2021-05-22T00:30:43.32 0.3 undecidable manual S 141 36.4413 50 0.11 70
IV.PARC.HHZ. 2021-05-22T00:30:39.52 0.3 undecidable manual S 338 24.9528 109 -0.12 71
IV.NARO.HHZ. 2021-05-22T00:30:39.59 0.3 undecidable manual S 44 26.1516 108 -0.44 66
IV.MURB.HNZ. 2021-05-22T00:30:39.19 0.6 undecidable manual S 145 23.8539 110 -0.09 48
IV.ATCC.HNZ. 2021-05-22T00:30:37.65 0.6 undecidable manual P 141 36.4413 50 -0.18 46
IV.PIEI.HHZ. 2021-05-22T00:30:37.45 0.3 undecidable manual S 54 17.871 116 0.1 72
IV.ATBU.HNN. 2021-05-22T00:30:37.23 0.3 undecidable manual S 76 15.9729 118 0.47 67
IV.ATVA.EHE. 2021-05-22T00:30:37.51 0.3 undecidable manual S 198 18.7701 114 -0.13 72
IV.APEC.HHZ. 2021-05-22T00:30:36.31 0.3 undecidable manual S 21 14.0748 121 0.11 72
IV.ATLO.HNE. 2021-05-22T00:30:36.14 0.3 undecidable manual S 163 14.4744 121 -0.16 72
IV.PARC.HHZ. 2021-05-22T00:30:36.22 0.6 undecidable manual P 338 24.9528 109 0.45 44
IV.BADI.EHZ. 2021-05-22T00:30:35.66 0.3 undecidable manual S 311 11.877 126 0.11 73
IV.PE3.EHZ. 2021-05-22T00:30:35.85 0.6 negative manual P 22 30.5472 106 -0.98 35
IV.MURB.HNZ. 2021-05-22T00:30:35.62 1.0 undecidable manual P 145 23.8539 110 0.06 24
IV.NARO.HHZ. 2021-05-22T00:30:35.63 0.1 undecidable manual P 44 26.1516 108 -0.36 90
IV.ATPC.HHN. 2021-05-22T00:30:35.01 0.3 undecidable manual S 61 9.2796 133 0.15 72
IV.ATMC.EHN. 2021-05-22T00:30:35.85 0.3 undecidable manual S 273 13.1757 123 -0.08 73
IV.ATVA.EHE. 2021-05-22T00:30:34.70 0.1 undecidable manual P 198 18.7701 114 0.09 96
IV.TB03.DHZ.01 2021-05-22T00:30:34.03 0.3 undecidable manual S 134 6.0939 144 -0.09 74
IV.PIEI.HHZ. 2021-05-22T00:30:34.50 0.1 undecidable manual P 54 17.871 116 0.05 97
IV.TB01.DHZ.01 2021-05-22T00:30:34.85 0.3 undecidable manual S 135 9.0798 133 0.04 74
IV.ATBU.HNN. 2021-05-22T00:30:34.23 0.1 undecidable manual P 76 15.9729 118 0.12 96
IV.ATVO.HHZ. 2021-05-22T00:30:34.40 0.3 undecidable manual S 148 7.5813 138 -0.05 74
IV.TB01.DHZ.01 2021-05-22T00:30:33.04 0.1 undecidable manual P 135 9.0798 133 0.06 98
IV.ATPI.EHZ. 2021-05-22T00:30:33.42 0.3 undecidable manual S 72 3.8961 156 -0.31 71
IV.ATPC.HHN. 2021-05-22T00:30:33.17 0.1 undecidable manual P 61 9.2796 133 0.17 96
IV.ATMC.EHN. 2021-05-22T00:30:33.62 0.6 undecidable manual P 273 13.1757 123 0 49
IV.APEC.HHZ. 2021-05-22T00:30:33.84 0.1 undecidable manual P 21 14.0748 121 0.06 98
IV.BADI.EHZ. 2021-05-22T00:30:33.55 0.1 undecidable manual P 311 11.877 126 0.14 96
IV.ATMI.HHZ. 2021-05-22T00:30:33.81 0.1 undecidable manual P 211 13.6752 122 0.09 97
IV.ATLO.HNE. 2021-05-22T00:30:33.63 0.3 undecidable manual P 163 14.4744 121 -0.21 71
IV.EL6.EHZ. 2021-05-22T00:30:32.04 3.0 negative manual P 0.05 0
IV.ATVO.HHZ. 2021-05-22T00:30:32.90 0.1 negative manual P 148 7.5813 138 0.13 97
IV.ATPI.EHZ. 2021-05-22T00:30:32.33 0.1 undecidable manual P 72 3.8961 156 -0.03 100
IV.TB03.DHZ.01 2021-05-22T00:30:32.65 0.1 undecidable manual P 134 6.0939 144 0.07 99
IV.CSP1.EHZ. 2021-05-22T00:30:32.46 3.0 positive manual Pn -0.01 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHN. ML:0.7 0.00007505000000000001 0.3 AML other m 2021-05-22T00:30:34.47
IV.ATVO.HHE. ML:0.6 0.00007099042499999999 0.14 AML other m 2021-05-22T00:30:36.09
IV.APEC.HHN. ML:0.7 0.000051966155 0.12 AML other m 2021-05-22T00:30:36.56
IV.APEC.HHE. ML:0.8 0.00007485 0.14 AML other m 2021-05-22T00:30:36.75
IV.PIEI.HHN. ML:0.6 0.000030464655 0.3 AML other m 2021-05-22T00:30:37.97
IV.PIEI.HHE. ML:0.7 0.000039336025 0.16 AML other m 2021-05-22T00:30:38.86
IV.NARO.HHE. ML:0.4 0.000014817406999999999 0.08 AML other m 2021-05-22T00:30:39.78
IV.NARO.HHN. ML:0.5 0.000018045575 0.06 AML other m 2021-05-22T00:30:40.18
IV.ATMI.HHE. ML:0.4 0.0000253356 0.18 AML other m 2021-05-22T00:30:39.48
IV.ATMI.HHN. ML:0.4 0.000023725475000000003 0.2 AML other m 2021-05-22T00:30:37.83
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