Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 12-04-2021 and time 14:28:41 (Italy) in region 1 km SE Pietralunga (PG)

A magnitude ML 1.8 earthquake occured in region: 1 km SE Pietralunga (PG), on

  • 12-04-2021 12:28:41 (UTC)
  • 12-04-2021 14:28:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4370, 12.4450 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 1 2111 2111
Montone PG 12 1680 3791
Apecchio PU 14 1882 5673
Gubbio PG 14 32216 37889
Cantiano PU 15 2245 40134
Città di Castello PG 17 39913 80047
Umbertide PG 17 16681 96728
Piobbico PU 18 2029 98757
Scheggia e Pascelupo PG 18 1393 100150

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km N of Perugia (166134 inhabitants)
46 Km E of Arezzo (99543 inhabitants)
57 Km NW of Foligno (57155 inhabitants)
65 Km SW of Pesaro (94582 inhabitants)
65 Km SW of Fano (60888 inhabitants)
70 Km S of Rimini (147750 inhabitants)
80 Km S of Cesena (96758 inhabitants)
89 Km W of Ancona (100861 inhabitants)
91 Km E of Siena (53903 inhabitants)
93 Km SE of Forlì (117913 inhabitants)
99 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
Bulletin
Rev1000 		ML 1.8 2021-04-12
12:28:41		 43.4368 12.4453 8 2021-07-12
16:55:08		 Bollettino Sismico Italiano INGV 89395071
Reviewed
Rev100 		ML 1.8 2021-04-12
12:28:41		 43.4377 12.4473 8 2021-04-12
12:35:57		 Sala Sismica INGV-Roma 89035411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-12 12:28:41 ± 0.04
Latitude 43.4368 ± 0.0018
Longitude 12.4453 ± 0.0025
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89395071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 227
Semi-minor axis of confidence ellipse (meter) 47
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 41
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 54
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.03417
Epicentral distance of station farthest from the epicenter (degree) 0.86425
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 89395071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-29 14:37:43

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 89035411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-12 12:35:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-04-12T12:28:59.45 0.6 undecidable manual S 102 54.2013 50 0.38 43
IV.MF5.EHZ. 2021-04-12T12:28:58.41 0.6 undecidable manual P 121 95.9262 50 0.36 40
IV.CRE.HHZ. 2021-04-12T12:28:56.70 0.6 undecidable manual S 297 44.5221 50 0.22 45
IV.ARVD.HHZ. 2021-04-12T12:28:55.38 0.3 undecidable manual S 80 40.5261 50 -0.02 71
IV.CAFI.HHZ. 2021-04-12T12:28:54.64 0.6 undecidable manual S 253 40.4262 50 -0.74 39
IV.MPAG.EHZ. 2021-04-12T12:28:53.34 0.6 undecidable manual S 50 33.0447 104 0.09 47
IV.ATCC.EHZ. 2021-04-12T12:28:53.23 0.6 undecidable manual S 151 32.0457 104 0.32 45
IV.MGAB.HHZ. 2021-04-12T12:28:53.05 0.6 undecidable manual P 205 64.0914 50 -0.09 45
IV.SSP9.EHZ. 2021-04-12T12:28:52.05 0.6 undecidable manual S 301 29.4483 105 0.01 48
IV.PE3.EHZ. 2021-04-12T12:28:52.58 0.6 undecidable manual S 8 29.0487 105 0.69 40
IV.FOSV.EHZ. 2021-04-12T12:28:52.42 0.6 undecidable manual S 122 29.9478 105 0.22 46
IV.PARC.HHZ. 2021-04-12T12:28:52.09 0.6 undecidable manual S 325 28.749 106 0.28 46
IV.SSFR.HHZ. 2021-04-12T12:28:51.19 0.3 undecidable manual S 90 27.1506 106 -0.07 72
IV.EL6.EHZ. 2021-04-12T12:28:51.38 0.3 undecidable manual P 102 54.2013 50 -0.24 66
IV.CRE.HHZ. 2021-04-12T12:28:50.01 0.3 undecidable manual P 297 44.5221 50 -0.11 69
IV.ARVD.HHZ. 2021-04-12T12:28:49.16 0.3 undecidable manual P 80 40.5261 50 -0.34 66
IV.CAFI.HHZ. 2021-04-12T12:28:49.45 0.3 undecidable manual P 253 40.4262 50 -0.04 70
IV.FRON.EHZ. 2021-04-12T12:28:49.82 0.6 undecidable manual S 68 24.2535 108 -0.5 44
IV.MURB.HHZ. 2021-04-12T12:28:49.49 0.3 undecidable manual S 162 20.3685 111 0.46 67
IV.NARO.HHZ. 2021-04-12T12:28:49.43 0.3 undecidable manual S 29 22.1556 110 -0.19 71
IV.BADI.EHZ. 2021-04-12T12:28:48.53 0.6 undecidable manual S 297 18.0708 114 0.23 47
IV.ATMI.HHZ. 2021-04-12T12:28:48.58 1.0 undecidable manual S 232 18.2706 114 0.21 24
IV.ATCC.EHZ. 2021-04-12T12:28:48.04 0.1 positive manual P 151 32.0457 104 -0.02 96
IV.ATLO.EHE. 2021-04-12T12:28:47.06 0.6 undecidable manual S 193 13.875 120 0.06 49
IV.PARC.HHZ. 2021-04-12T12:28:47.38 0.3 undecidable manual P 325 28.749 106 -0.05 72
IV.SSP9.EHZ. 2021-04-12T12:28:47.66 0.6 undecidable manual P 301 29.4483 105 0.09 47
IV.APEC.HHZ. 2021-04-12T12:28:47.23 0.6 undecidable manual S 351 13.6752 120 0.3 47
IV.MPAG.EHZ. 2021-04-12T12:28:47.93 0.1 undecidable manual P 50 33.0447 104 -0.33 90
IV.PIEI.HHZ. 2021-04-12T12:28:47.12 0.6 undecidable manual S 33 13.0758 121 0.35 46
IV.PE3.EHZ. 2021-04-12T12:28:47.52 0.1 undecidable manual P 8 29.0487 105 0.04 96
IV.FOSV.EHZ. 2021-04-12T12:28:47.55 0.3 undecidable manual P 122 29.9478 105 -0.1 71
IV.ATFO.HHZ. 2021-04-12T12:28:46.75 0.6 undecidable manual S 127 12.7761 122 0.06 49
IV.NARO.HHZ. 2021-04-12T12:28:46.00 0.1 positive manual P 29 22.1556 110 -0.16 95
IV.SSFR.HHZ. 2021-04-12T12:28:46.90 0.1 undecidable manual P 90 27.1506 106 -0.21 93
IV.ATBU.EHZ. 2021-04-12T12:28:46.14 0.6 undecidable manual S 63 9.3795 131 0.43 46
IV.FRON.EHZ. 2021-04-12T12:28:46.44 0.1 undecidable manual P 68 24.2535 108 -0.13 95
IV.ATMI.HHZ. 2021-04-12T12:28:45.96 0.3 undecidable manual P 232 18.2706 114 0.52 66
IV.BADI.EHZ. 2021-04-12T12:28:45.54 0.1 positive manual P 297 18.0708 114 0.13 96
IV.TB02.DHZ. 2021-04-12T12:28:45.19 0.6 undecidable manual S 201 7.881 135 -0.16 49
IV.MURB.HHZ. 2021-04-12T12:28:45.94 0.1 positive manual P 162 20.3685 111 0.12 96
IV.TB01.DHZ. 2021-04-12T12:28:44.64 0.6 undecidable manual S 187 6.1938 142 -0.31 47
IV.PIEI.HHZ. 2021-04-12T12:28:44.69 0.1 positive manual P 33 13.0758 121 0.17 96
IV.ATPC.HHE. 2021-04-12T12:28:44.40 0.6 undecidable manual S 11 4.995 148 -0.31 47
IV.APEC.HHZ. 2021-04-12T12:28:44.74 0.1 undecidable manual P 351 13.6752 120 0.13 97
IV.ATLO.EHE. 2021-04-12T12:28:44.75 0.1 undecidable manual P 193 13.875 120 0.1 97
IV.ATFO.HHZ. 2021-04-12T12:28:44.47 0.1 undecidable manual P 127 12.7761 122 0 99
IV.TB03.DHZ. 2021-04-12T12:28:44.34 0.6 undecidable manual S 216 4.8951 149 -0.35 47
IV.ATBU.EHZ. 2021-04-12T12:28:44.16 0.1 undecidable manual P 63 9.3795 131 0.25 95
IV.TB03.DHZ. 2021-04-12T12:28:43.18 0.1 undecidable manual P 216 4.8951 149 -0.14 98
IV.ATPI.EHZ. 2021-04-12T12:28:43.84 0.6 undecidable manual S 294 3.7962 155 -0.68 42
IV.TB01.DHZ. 2021-04-12T12:28:43.42 0.1 undecidable manual P 187 6.1938 142 -0.05 100
IV.ATPC.HHE. 2021-04-12T12:28:43.29 0.1 undecidable manual P 11 4.995 148 -0.04 100
IV.TB02.DHZ. 2021-04-12T12:28:43.73 0.1 undecidable manual P 201 7.881 135 0.03 100
IV.ATPI.EHZ. 2021-04-12T12:28:42.99 0.1 undecidable manual P 294 3.7962 155 -0.23 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PIEI.HHE. ML:2.0 0.0012850000000000001 0.12 AML other m 2021-04-12T12:28:47.59
IV.APEC.HHN. ML:1.8 0.0007405 0.38 AML other m 2021-04-12T12:28:47.48
IV.ATFO.HHN. ML:1.7 0.000603 0.8 AML other m 2021-04-12T12:28:47.67
IV.PIEI.HHN. ML:1.8 0.0007424999999999999 0.6 AML other m 2021-04-12T12:28:47.38
IV.APEC.HHE. ML:1.8 0.0006810000000000001 0.5 AML other m 2021-04-12T12:28:47.69
IV.ATFO.HHE. ML:1.8 0.0007245 0.46 AML other m 2021-04-12T12:28:47.90
IV.BADI.EHN. ML:1.9 0.000762 1.42 AML other m 2021-04-12T12:28:48.96
IV.BADI.EHE. ML:2.2 0.00152 0.2 AML other m 2021-04-12T12:28:49.12
IV.ATMI.HHE. ML:1.8 0.000571 0.98 AML other m 2021-04-12T12:28:49.81
IV.NARO.HHN. ML:1.3 0.0001515 0.14 AML other m 2021-04-12T12:28:49.81
IV.MURB.HHE. ML:2.1 0.0009575 1.46 AML other m 2021-04-12T12:28:49.83
IV.MURB.HNE. ML:2.0 0.000853 1.46 AML other m 2021-04-12T12:28:49.84
IV.NARO.HHE. ML:1.4 0.000192 0.16 AML other m 2021-04-12T12:28:49.94
IV.MURB.HNN. ML:2.0 0.0008449999999999999 0.86 AML other m 2021-04-12T12:28:50.43
IV.MURB.HHN. ML:2.1 0.000976 0.2 AML other m 2021-04-12T12:28:50.43
IV.SSFR.HHN. ML:1.9 0.000438 1.1 AML other m 2021-04-12T12:28:51.43
IV.SSFR.HNN. ML:2.1 0.0007065 1.12 AML other m 2021-04-12T12:28:51.43
IV.SSFR.HNE. ML:2.1 0.000665 1.82 AML other m 2021-04-12T12:28:53.97
IV.SSFR.HHE. ML:2.0 0.0005915 0.18 AML other m 2021-04-12T12:28:53.07
IV.ATMI.HHN. ML:1.8 0.000635 0.76 AML other m 2021-04-12T12:28:54.31
IV.ATCC.EHE. ML:1.9 0.0003575 0.22 AML other m 2021-04-12T12:28:54.38
IV.PARC.HHN. ML:1.5 0.00015500000000000003 0.58 AML other m 2021-04-12T12:28:54.41
IV.FOSV.EHE. ML:1.3 0.00009855 0.24 AML other m 2021-04-12T12:28:54.68
IV.FOSV.EHN. ML:1.4 0.000129 0.38 AML other m 2021-04-12T12:28:54.83
IV.PARC.HHE. ML:1.5 0.000153 0.6 AML other m 2021-04-12T12:28:55.92
IV.MPAG.EHN. ML:1.3 0.0000959 1.38 AML other m 2021-04-12T12:28:55.26
IV.CAFI.HHN. ML:1.3 0.0000633 1.48 AML other m 2021-04-12T12:28:56.83
IV.ARVD.HHN. ML:1.3 0.00007725 0.82 AML other m 2021-04-12T12:28:56.63
IV.ATCC.EHN. ML:1.7 0.0002175 0.46 AML other m 2021-04-12T12:28:56.71
IV.PE3.EHE. ML:2.0 0.0005885 0.4 AML other m 2021-04-12T12:28:56.60
IV.CRE.HHN. ML:1.3 0.00005695 1.34 AML other m 2021-04-12T12:28:57.87
IV.ARVD.HHE. ML:1.3 0.0000748 0.62 AML other m 2021-04-12T12:28:57.64
IV.CAFI.HHE. ML:1.2 0.00005725 0.76 AML other m 2021-04-12T12:28:57.77
IV.MPAG.EHE. ML:1.2 0.00006720000000000001 1.2 AML other m 2021-04-12T12:28:57.98
IV.CRE.HHE. ML:1.2 0.0000504 0.26 AML other m 2021-04-12T12:28:59.81
IV.EL6.EHE. ML:2.0 0.000211 0.76 AML other m 2021-04-12T12:29:00.61
IV.PE3.EHN. ML:2.0 0.0005375 0.5 AML other m 2021-04-12T12:29:01.05
IV.EL6.EHN. ML:1.8 0.00015050000000000003 0.6 AML other m 2021-04-12T12:29:01.39
IV.MGAB.HHN. ML:1.8 0.0001295 0.6 AML other m 2021-04-12T12:29:04.95
IV.MGAB.HHE. ML:1.7 0.0001004 1.14 AML other m 2021-04-12T12:29:04.36
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