Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 11-04-2021 and time 01:43:12 (UTC) in region 3 km SE Pietralunga (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km SE Pietralunga (PG), on

  • 11-04-2021 01:43:12 (UTC)
  • 11-04-2021 03:43:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4300, 12.4680 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 3 2111 2111
Gubbio PG 12 32216 34327
Montone PG 14 1680 36007
Cantiano PU 14 2245 38252
Apecchio PU 15 1882 40134
Scheggia e Pascelupo PG 17 1393 41527
Umbertide PG 18 16681 58208
Piobbico PU 18 2029 60237
Città di Castello PG 19 39913 100150
Cagli PU 20 8731 108881

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Perugia (166134 inhabitants)
47 Km E of Arezzo (99543 inhabitants)
56 Km NW of Foligno (57155 inhabitants)
64 Km SW of Fano (60888 inhabitants)
64 Km SW of Pesaro (94582 inhabitants)
71 Km S of Rimini (147750 inhabitants)
81 Km S of Cesena (96758 inhabitants)
87 Km W of Ancona (100861 inhabitants)
93 Km E of Siena (53903 inhabitants)
95 Km SE of Forlì (117913 inhabitants)
98 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 1.0 2021-04-11
01:43:12		 43.4302 12.4678 9 2021-04-11
02:26:28		 Sala Sismica INGV-Roma 88994041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-11 01:43:12 ± 0.16
Latitude 43.4302 ± 0.0036
Longitude 12.4678 ± 0.0050
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88994041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 174
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
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) 0.27519
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 88994041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-11 02:26:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATCC.EHZ. 2021-04-11T01:43:23.46 0.6 undecidable manual S 153 30.5472 106 0.26 48
IV.SSFR.HHZ. 2021-04-11T01:43:21.36 0.6 undecidable manual S 88 25.3524 109 -0.12 50
IV.NARO.HHZ. 2021-04-11T01:43:20.33 0.6 undecidable manual S 24 21.9669 112 -0.07 51
IV.FRON.EHZ. 2021-04-11T01:43:20.90 0.6 undecidable manual S 65 22.9548 111 0.21 50
IV.BADI.EHZ. 2021-04-11T01:43:20.01 0.6 undecidable manual S 296 20.0688 114 0.24 50
IV.ATMI.HHZ. 2021-04-11T01:43:19.32 3.0 undecidable manual S -0.62 0
IV.MURB.HHZ. 2021-04-11T01:43:19.76 0.6 undecidable manual S 166 19.0698 115 0.29 49
IV.ATCC.EHZ. 2021-04-11T01:43:18.32 0.3 negative manual P 153 30.5472 106 -0.22 73
IV.APEC.HHZ. 2021-04-11T01:43:18.26 0.6 undecidable manual S 345 14.7741 121 0.13 51
IV.SSFR.HHZ. 2021-04-11T01:43:17.32 0.6 negative manual P 88 25.3524 109 -0.23 49
IV.PIEI.HHZ. 2021-04-11T01:43:17.93 0.3 undecidable manual S 25 12.876 124 0.34 74
IV.MURB.HHZ. 2021-04-11T01:43:16.45 0.3 positive manual P 166 19.0698 115 0.06 77
IV.BADI.EHZ. 2021-04-11T01:43:16.67 0.3 negative manual P 296 20.0688 114 0.1 76
IV.NARO.HHZ. 2021-04-11T01:43:16.74 0.1 positive manual P 24 21.9669 112 -0.19 100
IV.FRON.EHZ. 2021-04-11T01:43:16.94 0.3 positive manual P 65 22.9548 111 -0.16 75
IV.PIEI.HHZ. 2021-04-11T01:43:15.40 1.0 positive manual P 25 12.876 124 0.1 26
IV.APEC.HHZ. 2021-04-11T01:43:15.70 0.3 undecidable manual P 345 14.7741 121 0.08 78
IV.ATPI.EHZ. 2021-04-11T01:43:15.20 0.6 undecidable manual S 293 5.7942 147 -0.61 46
IV.ATPI.EHZ. 2021-04-11T01:43:14.02 1.0 undecidable manual P 293 5.7942 147 -0.26 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHN. ML:1.0 0.00017199999999999998 0.14 AML other m 2021-04-11T01:43:15.34
IV.ATPI.EHE. ML:1.0 0.00016149999999999997 0.76 AML other m 2021-04-11T01:43:16.31
IV.PIEI.HHE. ML:0.8 0.00007845 0.8 AML other m 2021-04-11T01:43:18.46
IV.PIEI.HHN. ML:0.7 0.000058800000000000006 0.1 AML other m 2021-04-11T01:43:18.60
IV.MURB.HHN. ML:1.1 0.000105 1.74 AML other m 2021-04-11T01:43:20.92
IV.MURB.HHE. ML:1.2 0.0001174 1.74 AML other m 2021-04-11T01:43:20.12
IV.SSFR.HHN. ML:0.9 0.00004765 0.24 AML other m 2021-04-11T01:43:21.53
IV.SSFR.HHE. ML:0.9 0.0000459 0.56 AML other m 2021-04-11T01:43:23.99
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