Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 11-04-2021 and time 08:30:24 (UTC) in region 3 km W Preci (PG)

A magnitude ML 1.9 earthquake occured in region: 3 km W Preci (PG), on

  • 11-04-2021 08:30:24 (UTC)
  • 11-04-2021 10:30:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8770, 12.9990 at 10 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.

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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 3 724 724
Sellano PG 6 1079 1803
Cerreto di Spoleto PG 9 1075 2878
Visso MC 10 1107 3985
Norcia PG 12 4957 8942
Castelsantangelo sul Nera MC 13 281 9223
Monte Cavallo MC 13 145 9368
Ussita MC 14 444 9812
Vallo di Nera PG 16 364 10176
Cascia PG 18 3217 13393
Poggiodomo PG 19 117 13510
Campello sul Clitunno PG 19 2442 15952
Pieve Torina MC 19 1458 17410
Fiordimonte MC 19 202 17612

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
63 Km W of Teramo (54892 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
100 Km N of Guidonia Montecelio (88673 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 1.9 2021-04-11
08:30:24		 42.8773 12.9987 10 2021-07-12
16:55:06		 Bollettino Sismico Italiano INGV 89099591
Reviewed
Rev100 		ML 2.0 2021-04-11
08:30:24		 42.8775 13.001 10 2021-04-11
08:41:03		 Sala Sismica INGV-Roma 88998221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-11 08:30:24 ± 0.05
Latitude 42.8773 ± 0.0027
Longitude 12.9987 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89099591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 315
Semi-minor axis of confidence ellipse (meter) 251
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 55
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.09263
Epicentral distance of station farthest from the epicenter (degree) 0.73924
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 35
Type of magnitude ML
Reference to an origin 88998221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-11 08:41:03

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 89099591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-14 17:14:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATCC.EHZ. 2021-04-11T08:30:39.27 0.3 undecidable manual S 320 44.8218 50 0.35 66
IV.RM33.HNE. 2021-04-11T08:30:39.34 0.3 undecidable manual S 157 44.5221 50 0.52 64
IV.PIEI.HHZ. 2021-04-11T08:30:38.82 0.6 undecidable manual P 333 82.0512 50 0.35 41
IV.MF5.EHZ. 2021-04-11T08:30:38.29 0.3 undecidable manual S 72 39.4272 50 0.82 57
IV.SAP2.EHZ. 2021-04-11T08:30:38.77 0.3 undecidable manual S 53 40.626 50 0.99 53
IV.SMA1.EHZ. 2021-04-11T08:30:37.38 0.3 undecidable manual S 135 38.7279 50 0.09 71
IV.MOMA.HHZ. 2021-04-11T08:30:36.93 0.3 undecidable manual S 257 35.8419 50 0.43 66
IV.ARVD.HHZ. 2021-04-11T08:30:36.91 0.3 undecidable manual P 356 68.9754 50 0.46 62
IV.MTRA.EHZ. 2021-04-11T08:30:36.13 0.3 undecidable manual S 112 35.0427 50 -0.17 70
IV.LNSS.HHZ. 2021-04-11T08:30:35.08 0.3 undecidable manual S 174 30.6471 50 -0.04 73
IV.PF6.EHN. 2021-04-11T08:30:35.44 0.3 undecidable manual S 29 32.9448 50 -0.31 68
IV.ASSB.HHZ. 2021-04-11T08:30:35.47 0.3 undecidable manual S 304 33.1446 50 -0.32 68
IV.TERO.HHZ. 2021-04-11T08:30:34.27 0.3 undecidable manual P 120 56.7987 50 -0.3 66
IV.CSP1.EHZ. 2021-04-11T08:30:34.48 0.3 undecidable manual S 35 29.0487 50 -0.23 70
IT.FOPC.HGZ. 2021-04-11T08:30:34.23 0.3 undecidable manual S 293 26.1516 50 0.32 69
IV.MMO1.EHZ. 2021-04-11T08:30:33.68 0.3 undecidable manual S 85 26.751 50 -0.42 68
IV.FOSV.EHZ. 2021-04-11T08:30:33.54 0.3 undecidable manual P 338 50.1165 50 0 71
IV.MML1.HNZ. 2021-04-11T08:30:33.64 0.6 undecidable manual S 355 26.2515 50 -0.32 46
IV.EL6.EHZ. 2021-04-11T08:30:33.50 0.3 undecidable manual P 9 50.8158 50 -0.15 69
IV.MF5.EHZ. 2021-04-11T08:30:32.13 0.1 undecidable manual P 72 39.4272 50 0.25 91
IV.RM33.HNE. 2021-04-11T08:30:32.60 0.3 undecidable manual P 157 44.5221 50 -0.07 70
IV.GAVE.EHZ. 2021-04-11T08:30:32.62 0.3 undecidable manual S 203 22.2555 114 -0.11 73
IV.SAP2.EHZ. 2021-04-11T08:30:32.34 0.3 undecidable manual P 53 40.626 50 0.27 68
IV.ATCC.EHZ. 2021-04-11T08:30:32.61 0.3 undecidable manual P 320 44.8218 50 -0.12 70
IV.CESI.HHZ. 2021-04-11T08:30:31.00 0.3 undecidable manual S 332 16.0728 122 0.15 73
IV.MOMA.HHZ. 2021-04-11T08:30:31.45 0.3 undecidable manual P 257 35.8419 50 0.12 71
IV.MC2.EHZ. 2021-04-11T08:30:31.04 0.3 undecidable manual S 76 15.9729 122 0.24 72
IV.SMA1.EHZ. 2021-04-11T08:30:31.76 0.3 undecidable manual P 135 38.7279 50 -0.02 72
IV.FDMO.HHZ. 2021-04-11T08:30:31.55 0.3 undecidable manual S 22 19.0698 118 -0.2 72
IV.ASSB.HHZ. 2021-04-11T08:30:30.62 0.1 positive manual P 304 33.1446 50 -0.3 91
IV.MTRA.EHZ. 2021-04-11T08:30:30.90 0.1 undecidable manual P 112 35.0427 50 -0.31 91
IV.CSP1.EHZ. 2021-04-11T08:30:30.08 0.1 positive manual P 35 29.0487 50 -0.22 94
IV.LNSS.HHZ. 2021-04-11T08:30:30.27 0.1 positive manual P 174 30.6471 50 -0.26 92
IV.PF6.EHN. 2021-04-11T08:30:30.58 0.1 undecidable manual P 29 32.9448 50 -0.31 91
IV.MML1.HNZ. 2021-04-11T08:30:29.64 0.3 undecidable manual P 355 26.2515 50 -0.22 70
IT.MTCL.HGZ. 2021-04-11T08:30:29.76 0.1 undecidable manual S 0 12.9759 128 -0.19 97
IT.FOPC.HGZ. 2021-04-11T08:30:29.70 0.3 undecidable manual P 293 26.1516 50 -0.14 72
IV.GAVE.EHZ. 2021-04-11T08:30:29.11 0.1 positive manual P 203 22.2555 114 -0.04 98
IV.NRCA.HNZ. 2021-04-11T08:30:29.26 0.3 undecidable manual S 117 10.5783 134 -0.07 75
IV.MMO1.EHZ. 2021-04-11T08:30:29.69 0.1 positive manual P 85 26.751 50 -0.25 93
IV.FEMA.HNZ. 2021-04-11T08:30:29.36 0.3 undecidable manual S 24 10.2786 134 0.1 74
IV.MC2.EHZ. 2021-04-11T08:30:28.16 0.1 undecidable manual P 76 15.9729 122 0.12 98
IV.FDMO.HHZ. 2021-04-11T08:30:28.55 0.1 undecidable manual P 22 19.0698 118 -0.03 99
IV.CESI.HHZ. 2021-04-11T08:30:28.15 0.1 positive manual P 332 16.0728 122 0.09 98
IV.NRCA.HNZ. 2021-04-11T08:30:27.27 0.1 negative manual P 117 10.5783 134 0.08 99
IV.FEMA.HNZ. 2021-04-11T08:30:27.36 0.1 undecidable manual P 24 10.2786 134 0.21 97
IT.MTCL.HGZ. 2021-04-11T08:30:27.58 0.1 positive manual P 0 12.9759 128 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNN. ML:2.6 0.0047620909999999995 0.1344 AML other m 2021-04-11T08:30:29.57
IV.FEMA.HNE. ML:2.4 0.0034575839999999997 0.1856 AML other m 2021-04-11T08:30:29.56
IV.CESI.HHN. ML:2.0 0.0008629999999999999 0.3 AML other m 2021-04-11T08:30:31.20
IV.CESI.HHE. ML:1.9 0.00065117925 0.16 AML other m 2021-04-11T08:30:31.05
IV.CESI.HNE. ML:1.8 0.0005697098499999999 0.1472 AML other m 2021-04-11T08:30:31.13
IV.FDMO.HHE. ML:2.3 0.0017019709999999998 0.1792 AML other m 2021-04-11T08:30:31.72
IV.FDMO.HHN. ML:2.1 0.0010605 0.16 AML other m 2021-04-11T08:30:31.77
IV.GAVE.HNN. ML:1.9 0.000475 0.22 AML other m 2021-04-11T08:30:32.69
IV.GAVE.EHN. ML:2.3 0.001385 0.2 AML other m 2021-04-11T08:30:32.80
IV.GAVE.EHE. ML:2.3 0.001295223 0.16 AML other m 2021-04-11T08:30:32.80
IV.GAVE.HNE. ML:2.3 0.001218977 0.2624 AML other m 2021-04-11T08:30:33.46
IV.CSP1.EHN. ML:2.3 0.0009900943 1.8208 AML other m 2021-04-11T08:30:34.05
IV.CSP1.EHE. ML:2.3 0.0009155 1.7 AML other m 2021-04-11T08:30:34.11
IV.LNSS.HHN. ML:1.9 0.000345 0.18 AML other m 2021-04-11T08:30:35.51
IV.LNSS.HHE. ML:1.8 0.0002959057 0.16 AML other m 2021-04-11T08:30:35.58
IV.ASSB.HHE. ML:2.0 0.000382 0.16 AML other m 2021-04-11T08:30:35.65
IV.ASSB.HHN. ML:1.8 0.00028481845 0.1024 AML other m 2021-04-11T08:30:36.06
IV.MTRA.HNE. ML:2.1 0.00046950099999999994 0.192 AML other m 2021-04-11T08:30:36.28
IV.MTRA.HNN. ML:2.0 0.0003949092 0.16 AML other m 2021-04-11T08:30:36.58
IV.MTRA.EHE. ML:2.1 0.0004599139 0.16 AML other m 2021-04-11T08:30:36.57
IV.MTRA.EHN. ML:2.0 0.00040741905000000003 0.16 AML other m 2021-04-11T08:30:36.57
IV.MOMA.HHN. ML:1.9 0.00029707080000000003 0.16 AML other m 2021-04-11T08:30:38.58
IV.MOMA.HHE. ML:2.0 0.00038644035 0.1408 AML other m 2021-04-11T08:30:38.58
IV.MOMA.HNN. ML:1.9 0.00031800000000000003 0.18 AML other m 2021-04-11T08:30:38.58
IV.MF5.EHE. ML:2.0 0.0003301533 0.3584 AML other m 2021-04-11T08:30:38.92
IV.MF5.EHN. ML:1.7 0.00019104280000000002 0.3456 AML other m 2021-04-11T08:30:38.94
IV.MOMA.HNE. ML:2.0 0.00037428575 0.16 AML other m 2021-04-11T08:30:38.59
IV.ATCC.EHN. ML:1.6 0.00012642619500000002 0.2432 AML other m 2021-04-11T08:30:39.31
IV.SMA1.EHE. ML:1.6 0.000157 0.52 AML other m 2021-04-11T08:30:40.89
IV.ATCC.EHE. ML:1.5 0.00009989161 0.1216 AML other m 2021-04-11T08:30:40.66
IV.EL6.EHE. ML:2.0 0.0002635 0.34 AML other m 2021-04-11T08:30:41.06
IV.SAP2.EHE. ML:1.7 0.0001727025 0.1152 AML other m 2021-04-11T08:30:39.23
IV.EL6.EHN. ML:2.2 0.00038500000000000003 0.3 AML other m 2021-04-11T08:30:41.88
IV.TERO.HHE. ML:1.5 0.00006815684 0.1408 AML other m 2021-04-11T08:30:43.57
IV.TERO.HHN. ML:1.5 0.00007248237500000001 0.1024 AML other m 2021-04-11T08:30:42.70
IV.CESI.HNN. ML:2.2 0.0015423365 0.5824 AML other m 2021-04-11T08:30:31.57
IV.LNSS.HNN. ML:1.8 0.00031840615 0.1664 AML other m 2021-04-11T08:30:35.59
IV.LNSS.HNE. ML:1.7 0.00024179945000000002 0.1536 AML other m 2021-04-11T08:30:35.58
IV.SMA1.EHN. ML:1.6 0.00013055108 0.9792 AML other m 2021-04-11T08:30:39.43
IV.SAP2.EHN. ML:2.4 0.00089335125 0.4608 AML other m 2021-04-11T08:30:42.30
IV.FOSV.EHE. ML:1.2 0.000043703905 0.1408 AML other m 2021-04-11T08:30:41.45
IV.FOSV.EHN. ML:1.2 0.000045359045 0.224 AML other m 2021-04-11T08:30:44.65
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
Waveforms Seismic signals in miniseed + resp format Download