Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 25-02-2021 and time 02:12:04 (UTC) in region 7 km SE Pietralunga (PG)

A magnitude ML 1.2 earthquake occured in region: 7 km SE Pietralunga (PG), on

  • 25-02-2021 02:12:04 (UTC)
  • 25-02-2021 03:12:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.39, 12.5 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
Gubbio PG 8 32216 34327
Cantiano PU 14 2245 36572
Montone PG 14 1680 38252
Scheggia e Pascelupo PG 14 1393 39645
Umbertide PG 17 16681 56326
Costacciaro PG 18 1216 57542
Apecchio PU 19 1882 59424

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km N of Perugia (166134 inhabitants)
50 Km E of Arezzo (99543 inhabitants)
52 Km NW of Foligno (57155 inhabitants)
66 Km SW of Fano (60888 inhabitants)
67 Km SW of Pesaro (94582 inhabitants)
75 Km S of Rimini (147750 inhabitants)
85 Km S of Cesena (96758 inhabitants)
86 Km W of Ancona (100861 inhabitants)
93 Km N of Terni (111501 inhabitants)
94 Km E of Siena (53903 inhabitants)
99 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 1.2 2021-02-25
02:12:04		 43.39 12.5 10 2021-02-25
05:28:33		 Sala Sismica INGV-Roma 87471821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-25 02:12:04 ± 0.07
Latitude 43.39 ± 0.00
Longitude 12.50 ± 0.01
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 87471821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
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) 0.06115
Epicentral distance of station farthest from the epicenter (degree) 0.33994
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 87471821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-25 05:28:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-02-25T02:12:11.64 0.3 undecidable manual P 72 0.3399 50 0.13 71
IV.PARC.HHZ. 2021-02-25T02:12:11.04 0.1 undecidable manual P 324 0.3157 50 -0.05 96
IV.MPAG.EHZ. 2021-02-25T02:12:10.49 0.1 undecidable manual P 39 0.3031 50 -0.39 90
IV.MURB.HHZ. 2021-02-25T02:12:10.30 0.3 undecidable manual S 171 0.1322 123 0.13 74
IV.PIEI.HHZ. 2021-02-25T02:12:10.98 0.3 undecidable manual S 11 0.1448 121 0.4 69
IV.BADI.EHZ. 2021-02-25T02:12:09.38 0.3 positive manual P 303 0.2158 112 0.12 73
IV.FOSV.EHZ. 2021-02-25T02:12:09.40 0.6 undecidable manual P 117 0.2167 112 0.13 48
IV.SSFR.HHZ. 2021-02-25T02:12:09.23 0.1 positive manual P 78 0.2122 112 0.05 98
IV.NARO.HHZ. 2021-02-25T02:12:09.39 0.1 positive manual P 16 0.2257 111 -0.07 98
IV.FRON.EHZ. 2021-02-25T02:12:09.15 0.1 positive manual P 53 0.2077 113 0.06 98
IV.ATCC.EHZ. 2021-02-25T02:12:09.69 1.0 negative manual P 153 0.2329 110 0.07 24
IV.ATMI.HHZ. 2021-02-25T02:12:08.48 0.1 undecidable manual P 250 0.1754 116 0.04 99
IV.PIEI.HHZ. 2021-02-25T02:12:08.07 1.0 negative manual P 11 0.1448 121 0.23 24
IV.ATPI.EHZ. 2021-02-25T02:12:08.48 0.3 undecidable manual S 310 0.089 134 -0.38 71
IV.APEC.HHZ. 2021-02-25T02:12:08.58 0.1 positive manual P 342 0.1736 116 0.18 97
IV.MURB.HHZ. 2021-02-25T02:12:07.76 0.1 positive manual P 171 0.1322 123 0.16 98
IV.ATFO.HHZ. 2021-02-25T02:12:07.78 0.3 undecidable manual S 116 0.0612 145 -0.39 71
IV.ATFO.HHZ. 2021-02-25T02:12:06.33 0.1 positive manual P 116 0.0612 145 -0.11 100
IV.ATPI.EHZ. 2021-02-25T02:12:06.79 0.3 positive manual P 310 0.089 134 -0.05 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATFO.HHE. ML:1.3 0.000342 0.52 AML other m 2021-02-25T02:12:08.33
IV.ATFO.HHN. ML:1.4 0.0003985 0.26 AML other m 2021-02-25T02:12:08.23
IV.ATPI.EHN. ML:1 0.0001335 0.36 AML other m 2021-02-25T02:12:08.74
IV.ATPI.EHE. ML:0.8 9.16E-5 1.02 AML other m 2021-02-25T02:12:09.39
IV.MURB.HHN. ML:1.5 0.000297 1.14 AML other m 2021-02-25T02:12:11.19
IV.PIEI.HHN. ML:1.1 0.0001255 0.16 AML other m 2021-02-25T02:12:11.55
IV.MURB.HHE. ML:1.7 0.0004655 0.2 AML other m 2021-02-25T02:12:11.60
IV.PIEI.HHE. ML:1.4 0.0002295 0.16 AML other m 2021-02-25T02:12:11.67
IV.APEC.HHE. ML:1 7.6E-5 0.18 AML other m 2021-02-25T02:12:12.41
IV.APEC.HHN. ML:1 7.09E-5 0.6 AML other m 2021-02-25T02:12:12.45
IV.FRON.EHN. ML:1.1 7.365E-5 0.1 AML other m 2021-02-25T02:12:13.20
IV.NARO.HHE. ML:1 6.17E-5 0.6 AML other m 2021-02-25T02:12:13.76
IV.BADI.EHE. ML:1.4 0.000149 0.18 AML other m 2021-02-25T02:12:13.61
IV.SSFR.HHN. ML:1.4 0.000168 0.2 AML other m 2021-02-25T02:12:13.78
IV.BADI.EHN. ML:1.5 0.000195 0.38 AML other m 2021-02-25T02:12:13.72
IV.ATMI.HHN. ML:0.9 6.155E-5 0.66 AML other m 2021-02-25T02:12:13.80
IV.NARO.HHN. ML:1 5.74E-5 0.06 AML other m 2021-02-25T02:12:13.84
IV.SSFR.HHE. ML:1.4 0.000157 0.26 AML other m 2021-02-25T02:12:14.41
IV.ATMI.HHE. ML:1.1 9.475E-5 0.52 AML other m 2021-02-25T02:12:14.43
IV.ATCC.EHN. ML:1.4 0.0001365 0.16 AML other m 2021-02-25T02:12:14.44
IV.ATCC.EHE. ML:1.3 0.0001275 0.12 AML other m 2021-02-25T02:12:14.53
IV.FRON.EHE. ML:0.8 3.77E-5 1.56 AML other m 2021-02-25T02:12:14.08
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download