Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 10-04-2021 and time 19:59:03 (UTC) in region 5 km SW Preci (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km SW Preci (PG), on

  • 10-04-2021 19:59:03 (UTC)
  • 10-04-2021 21:59:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8520, 12.9970 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
Preci PG 5 724 724
Sellano PG 7 1079 1803
Cerreto di Spoleto PG 7 1075 2878
Norcia PG 10 4957 7835
Visso MC 12 1107 8942
Castelsantangelo sul Nera MC 14 281 9223
Vallo di Nera PG 14 364 9587
Cascia PG 15 3217 12804
Ussita MC 16 444 13248
Monte Cavallo MC 16 145 13393
Poggiodomo PG 16 117 13510
Campello sul Clitunno PG 18 2442 15952
Sant'Anatolia di Narco PG 19 564 16516

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
62 Km W of Teramo (54892 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
87 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
97 Km N of Guidonia Montecelio (88673 inhabitants)
100 Km N of Tivoli (56533 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 1.1 2021-04-10
19:59:03		 42.8523 12.997 10 2021-04-10
20:09:47		 Sala Sismica INGV-Roma 88982631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-10 19:59:03 ± 0.06
Latitude 42.8523 ± 0.0027
Longitude 12.9970 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88982631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 389
Semi-minor axis of confidence ellipse (meter) 277
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
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) 0.08813
Epicentral distance of station farthest from the epicenter (degree) 0.50092
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 88982631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-10 20:09:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-04-10T19:59:20.76 0.3 undecidable manual S 9 53.6019 50 0.46 64
IV.TERO.HHZ. 2021-04-10T19:59:20.88 0.6 undecidable manual S 117 55.5999 50 0.04 46
IV.ATCC.EHZ. 2021-04-10T19:59:18.96 0.6 undecidable manual S 322 46.9197 50 0.44 43
IV.MF5.EHZ. 2021-04-10T19:59:17.58 0.3 undecidable manual S 68 40.5261 50 0.78 58
IV.ASSB.HHZ. 2021-04-10T19:59:15.04 0.6 undecidable manual S 308 34.6431 50 -0.2 47
IV.CSP1.EHZ. 2021-04-10T19:59:14.27 0.6 undecidable manual S 32 31.4463 50 -0.12 48
IV.TERO.HHZ. 2021-04-10T19:59:13.52 0.6 undecidable manual P 117 55.5999 50 0.09 46
IV.EL6.EHZ. 2021-04-10T19:59:13.01 0.1 undecidable manual P 9 53.6019 50 -0.11 92
IV.LNSS.HHZ. 2021-04-10T19:59:13.16 0.6 undecidable manual S 173 27.8499 50 -0.28 46
IV.MML1.HNZ. 2021-04-10T19:59:13.56 0.6 undecidable manual S 356 29.0487 50 -0.18 47
IV.MMO1.EHZ. 2021-04-10T19:59:12.78 0.3 undecidable manual S 79 27.3504 50 -0.5 66
IV.ATCC.EHZ. 2021-04-10T19:59:12.05 0.1 undecidable manual P 322 46.9197 50 -0.04 94
IV.FDMO.HHZ. 2021-04-10T19:59:11.36 0.3 undecidable manual S 20 21.6672 115 -0.24 71
IV.MF5.EHZ. 2021-04-10T19:59:11.42 0.6 negative manual P 68 40.5261 50 0.33 45
IV.GAVE.EHZ. 2021-04-10T19:59:11.04 0.6 undecidable manual S 205 19.6692 117 0.08 49
IV.MC2.EHZ. 2021-04-10T19:59:10.23 0.6 undecidable manual S 67 16.9719 121 0.09 49
IV.ASSB.HHZ. 2021-04-10T19:59:10.06 0.1 negative manual P 308 34.6431 50 -0.13 95
IV.CESI.HHZ. 2021-04-10T19:59:10.49 0.6 undecidable manual S 336 18.4704 118 -0.12 49
IV.MML1.HNZ. 2021-04-10T19:59:09.34 0.1 undecidable manual P 356 29.0487 50 0.01 98
IV.CSP1.EHZ. 2021-04-10T19:59:09.52 0.3 positive manual P 32 31.4463 50 -0.18 71
IV.FEMA.HNZ. 2021-04-10T19:59:09.01 0.3 undecidable manual S 19 12.876 128 0.03 75
IT.MTCL.HGZ. 2021-04-10T19:59:09.44 0.3 undecidable manual S 1 15.6732 123 -0.33 70
IV.NRCA.HHZ. 2021-04-10T19:59:08.00 0.6 undecidable manual S 102 9.7791 136 -0.16 49
IV.FDMO.HHZ. 2021-04-10T19:59:08.01 0.1 positive manual P 20 21.6672 115 -0.09 98
IV.MMO1.EHZ. 2021-04-10T19:59:08.82 0.3 positive manual P 79 27.3504 50 -0.25 70
IV.LNSS.HHZ. 2021-04-10T19:59:08.99 0.1 undecidable manual P 173 27.8499 50 -0.17 95
IV.GAVE.EHZ. 2021-04-10T19:59:07.94 0.1 positive manual P 205 19.6692 117 0.21 96
IV.MC2.EHZ. 2021-04-10T19:59:07.34 0.6 positive manual P 67 16.9719 121 0.1 49
IT.MTCL.HGZ. 2021-04-10T19:59:07.07 0.1 undecidable manual P 1 15.6732 123 0.03 100
IV.CESI.HHZ. 2021-04-10T19:59:07.66 0.1 negative manual P 336 18.4704 118 0.13 97
IV.NRCA.HHZ. 2021-04-10T19:59:06.19 0.6 undecidable manual P 102 9.7791 136 0.08 50
IV.FEMA.HNZ. 2021-04-10T19:59:06.86 0.1 undecidable manual P 19 12.876 128 0.28 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.000341 0.08 AML other m 2021-04-10T19:59:08.04
IV.NRCA.HHE. ML:1.1 0.000153 0.78 AML other m 2021-04-10T19:59:09.55
IV.CESI.HHE. ML:1.0 0.00007000000000000001 1.42 AML other m 2021-04-10T19:59:11.81
IV.CESI.HHN. ML:1.3 0.00014700000000000002 0.4 AML other m 2021-04-10T19:59:11.04
IV.GAVE.EHN. ML:1.4 0.0002115 0.2 AML other m 2021-04-10T19:59:11.29
IV.GAVE.EHE. ML:1.6 0.00032799999999999995 0.12 AML other m 2021-04-10T19:59:11.28
IV.FDMO.HHE. ML:1.2 0.000117 0.14 AML other m 2021-04-10T19:59:11.56
IV.FDMO.HHN. ML:1.2 0.0001185 0.12 AML other m 2021-04-10T19:59:11.96
IV.LNSS.HHN. ML:1.2 0.000088 0.24 AML other m 2021-04-10T19:59:13.66
IV.LNSS.HHE. ML:1.2 0.000073 0.64 AML other m 2021-04-10T19:59:14.32
IV.CSP1.EHE. ML:1.1 0.000053995896 0.1408 AML other m 2021-04-10T19:59:15.53
IV.CSP1.EHN. ML:1.2 0.000064998775 0.1664 AML other m 2021-04-10T19:59:15.44
IV.ASSB.HHE. ML:0.8 0.0000244837145 0.192 AML other m 2021-04-10T19:59:16.44
IV.ASSB.HHN. ML:0.6 0.0000164797255 0.1408 AML other m 2021-04-10T19:59:15.80
IV.ATCC.EHE. ML:0.8 0.000017716352500000002 0.576 AML other m 2021-04-10T19:59:19.41
IV.ATCC.EHN. ML:0.8 0.000021531785 0.8576 AML other m 2021-04-10T19:59:19.07
IV.EL6.EHE. ML:1.0 0.000026876325500000002 0.4608 AML other m 2021-04-10T19:59:21.30
IV.EL6.EHN. ML:1.2 0.000034725565 0.3456 AML other m 2021-04-10T19:59:21.56
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