Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 24-05-2021 and time 02:37:47 (UTC) in region 7 km W Pietralunga (PG)

A magnitude ML 0.5 earthquake occured in region: 7 km W Pietralunga (PG), on

  • 24-05-2021 02:37:47 (UTC)
  • 24-05-2021 04:37:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4360, 12.3550 at 10 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 8 1680 3791
Città di Castello PG 10 39913 43704
Umbertide PG 14 16681 60385
Apecchio PU 15 1882 62267
Monte Santa Maria Tiberina PG 15 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)
60 Km NW of Foligno (57155 inhabitants)
69 Km SW of Pesaro (94582 inhabitants)
70 Km SW of Fano (60888 inhabitants)
72 Km S of Rimini (147750 inhabitants)
79 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)
100 Km N of Terni (111501 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 0.5 2021-05-24
02:37:47		 43.4357 12.3552 10 2021-05-24
03:08:14		 Sala Sismica INGV-Roma 90438481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-24 02:37:47 ± 0.12
Latitude 43.4357 ± 0.0054
Longitude 12.3552 ± 0.0050
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90438481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 587
Semi-minor axis of confidence ellipse (meter) 336
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 187
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 16
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.23922
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 90438481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-24 03:08:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2021-05-24T02:37:56.65 0.3 undecidable manual S 43 26.5512 50 -0.27 69
IV.PARC.HHZ. 2021-05-24T02:37:56.57 3.0 undecidable manual S 0
IV.FIR.HHZ. 2021-05-24T02:37:55.03 3.0 undecidable manual P 0 0
IV.PARC.HHZ. 2021-05-24T02:37:54.21 3.0 undecidable manual P 0
IV.PIEI.HHZ. 2021-05-24T02:37:54.74 0.1 undecidable manual S 52 18.2706 119 0.3 93
IV.NARO.HHZ. 2021-05-24T02:37:52.64 0.1 undecidable manual P 43 26.5512 50 -0.16 94
IV.ATPC.HHN. 2021-05-24T02:37:52.13 0.3 undecidable manual S 59 9.5793 137 0.08 74
IV.BADI.EHN. 2021-05-24T02:37:52.67 0.1 undecidable manual S 313 12.0768 130 -0.01 99
IV.ATMC.EHZ. 2021-05-24T02:37:52.83 0.1 undecidable manual S 275 13.1757 128 -0.13 97
IV.ATVO.HHZ. 2021-05-24T02:37:51.56 0.1 undecidable manual S 145 7.2927 145 0.03 100
IV.TB03.DHZ.01 2021-05-24T02:37:51.13 0.1 undecidable manual S 131 5.8941 150 -0.14 98
IV.PIEI.HHZ. 2021-05-24T02:37:51.50 0.1 undecidable manual P 52 18.2706 119 0.13 96
IV.ATPI.EHZ. 2021-05-24T02:37:50.46 0.1 undecidable manual S 66 4.1958 158 -0.55 89
IV.ATMC.EHZ. 2021-05-24T02:37:50.67 0.1 undecidable manual P 275 13.1757 128 0.16 96
IV.ATPC.HHN. 2021-05-24T02:37:50.15 0.1 undecidable manual P 59 9.5793 137 0.16 97
IV.BADI.EHN. 2021-05-24T02:37:50.50 0.1 undecidable manual P 313 12.0768 130 0.14 97
IV.TB01.DHZ.01 2021-05-24T02:37:49.94 3.0 undecidable manual P 0
IV.ATPI.EHZ. 2021-05-24T02:37:49.30 0.1 undecidable manual P 66 4.1958 158 -0.09 99
IV.ATVO.HHZ. 2021-05-24T02:37:49.88 0.1 undecidable manual P 145 7.2927 145 0.19 97
IV.TB03.DHZ.01 2021-05-24T02:37:49.63 0.1 undecidable manual P 131 5.8941 150 0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHN. ML:0.7 0.0000924 0.32 AML other m 2021-05-24T02:37:50.53
IV.ATPI.EHE. ML:0.6 0.00007209999999999999 0.6 AML other m 2021-05-24T02:37:50.48
IV.ATVO.HHE. ML:0.4 0.000035199735000000004 1.5792 AML other m 2021-05-24T02:37:51.66
IV.ATVO.HHN. ML:0.3 0.00003001603 0.6992 AML other m 2021-05-24T02:37:51.64
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