Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 11-05-2021 and time 19:40:47 (Italy) in region 3 km E Preci (PG)

A magnitude ML 1.6 earthquake occured in region: 3 km E Preci (PG), on

  • 11-05-2021 17:40:47 (UTC)
  • 11-05-2021 19:40:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8670, 13.0720 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
Visso MC 7 1107 1831
Castelsantangelo sul Nera MC 7 281 2112
Norcia PG 8 4957 7069
Ussita MC 10 444 7513
Sellano PG 12 1079 8592
Cerreto di Spoleto PG 14 1075 9667
Monte Cavallo MC 15 145 9812
Cascia PG 17 3217 13029
Fiordimonte MC 19 202 13231
Bolognola MC 19 142 13373
Pieve Torina MC 20 1458 14831

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
57 Km W of Teramo (54892 inhabitants)
62 Km E of Perugia (166134 inhabitants)
63 Km NW of L'Aquila (69753 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
96 Km W of Montesilvano (53738 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 1.6 2021-05-11
17:40:47		 42.8668 13.0718 10 2021-12-29
11:12:19		 Bollettino Sismico Italiano INGV 93919921
Reviewed
Rev100 		ML 1.6 2021-05-11
17:40:47		 42.8693 13.0688 11 2021-05-11
17:45:49		 Sala Sismica INGV-Roma 89998431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-11 17:40:47 ± 0.04
Latitude 42.8668 ± 0.0018
Longitude 13.0718 ± 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 93919921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 252
Semi-minor axis of confidence ellipse (meter) 192
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 59
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 42
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) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51621
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 41
Type of magnitude ML
Reference to an origin 93919921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-10 11:31:32

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 89998431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-11 17:45:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HHZ. 2021-05-11T17:41:05.95 0.3 undecidable manual S 10 57.2982 50 0.2 67
IV.ATCC.EHZ. 2021-05-11T17:41:04.09 0.6 undecidable manual S 315 49.7169 50 0.37 44
IV.ARRO.EHZ. 2021-05-11T17:41:01.03 0.6 undecidable manual S 218 40.5261 50 -0.22 46
IV.MOMA.HNZ. 2021-05-11T17:41:01.71 0.3 undecidable manual S 260 41.4252 50 0.22 69
IV.RM33.EHZ. 2021-05-11T17:41:01.45 0.6 undecidable manual S 164 41.3253 50 -0.04 47
IV.SAP2.EHE. 2021-05-11T17:41:00.62 0.3 undecidable manual S 46 36.8298 50 0.35 67
IV.ASSB.HHZ. 2021-05-11T17:41:00.76 0.6 undecidable manual S 300 38.8278 50 -0.04 48
IV.SMA1.EHZ. 2021-05-11T17:40:59.81 0.3 undecidable manual S 141 33.8439 50 0.32 68
IV.MF5.EHZ. 2021-05-11T17:40:59.82 0.3 undecidable manual S 67 34.2435 50 0.23 69
IV.T1299.HNN. 2021-05-11T17:40:59.13 0.3 undecidable manual S 146 30.9468 50 0.42 67
IV.CING.HHZ. 2021-05-11T17:40:58.43 0.3 undecidable manual P 10 57.2982 50 0.25 66
IV.LNSS.HHZ. 2021-05-11T17:40:58.15 0.3 undecidable manual S 185 29.3484 50 -0.14 71
IV.GUMA.HHZ. 2021-05-11T17:40:58.88 0.3 undecidable manual S 44 30.4473 50 0.3 69
IV.CSP1.EHZ. 2021-05-11T17:40:57.43 0.3 undecidable manual S 23 27.1506 50 -0.28 69
IV.MTRA.EHZ. 2021-05-11T17:40:57.91 0.3 undecidable manual S 115 29.1486 50 -0.31 69
IV.FOSV.EHZ. 2021-05-11T17:40:57.45 1.0 undecidable manual P 332 53.7018 50 -0.18 23
IV.MML1.HNZ. 2021-05-11T17:40:57.93 0.3 undecidable manual S 344 28.5492 50 -0.14 71
IV.ATCC.EHZ. 2021-05-11T17:40:56.73 0.3 undecidable manual P 315 49.7169 50 -0.28 67
IV.TERO.HHZ. 2021-05-11T17:40:56.83 0.3 undecidable manual P 122 51.1155 50 -0.39 65
IV.GAVE.EHZ. 2021-05-11T17:40:56.92 0.3 undecidable manual S 217 24.1536 50 0.03 74
IV.ASSB.HHZ. 2021-05-11T17:40:55.23 0.3 undecidable manual P 300 38.8278 50 -0.09 71
IV.MOMA.HNZ. 2021-05-11T17:40:55.86 0.6 undecidable manual P 260 41.4252 50 0.14 47
IV.FDMO.HHZ. 2021-05-11T17:40:55.00 0.6 undecidable manual S 4 18.87 119 -0.32 47
IV.RM33.EHZ. 2021-05-11T17:40:55.44 0.3 undecidable manual P 164 41.3253 50 -0.28 68
IV.MMO1.EHZ. 2021-05-11T17:40:55.59 0.3 undecidable manual S 80 21.0678 116 -0.4 68
IV.CESI.HHZ. 2021-05-11T17:40:55.73 0.6 undecidable manual S 319 20.4684 117 -0.08 49
IV.ARRO.EHZ. 2021-05-11T17:40:55.60 0.3 undecidable manual P 218 40.5261 50 0.02 72
IV.GUMA.HHZ. 2021-05-11T17:40:54.08 0.3 undecidable manual P 44 30.4473 50 0.04 73
IV.T1299.HNN. 2021-05-11T17:40:54.16 0.1 undecidable manual P 146 30.9468 50 0.04 97
IV.SMA1.EHZ. 2021-05-11T17:40:54.40 0.1 undecidable manual P 141 33.8439 50 -0.17 94
IV.SAP2.EHE. 2021-05-11T17:40:54.93 0.6 undecidable manual P 46 36.8298 50 -0.09 47
IV.MF5.EHZ. 2021-05-11T17:40:54.85 0.3 undecidable manual P 67 34.2435 50 0.23 69
IV.FEMA.HNZ. 2021-05-11T17:40:53.36 0.3 undecidable manual S 350 10.6782 134 0.33 71
IV.LNSS.HHZ. 2021-05-11T17:40:53.82 0.3 undecidable manual P 185 29.3484 50 -0.05 72
IV.GAVE.EHZ. 2021-05-11T17:40:53.10 0.1 undecidable manual P 217 24.1536 50 0.03 98
IV.MML1.HNZ. 2021-05-11T17:40:53.54 0.1 undecidable manual P 344 28.5492 50 -0.2 94
IV.CSP1.EHZ. 2021-05-11T17:40:53.36 0.3 undecidable manual P 23 27.1506 50 -0.18 71
IV.MC2.EHZ. 2021-05-11T17:40:53.35 0.3 undecidable manual S 0.11 74
IV.MTRA.EHZ. 2021-05-11T17:40:53.60 0.3 undecidable manual P 115 29.1486 50 -0.23 70
IT.MTCL.HGZ. 2021-05-11T17:40:53.99 0.3 undecidable manual S 337 15.2736 124 -0.27 71
IV.CESI.HHZ. 2021-05-11T17:40:52.43 0.1 undecidable manual P 319 20.4684 117 -0.01 99
IV.FDMO.HHZ. 2021-05-11T17:40:52.12 0.1 undecidable manual P 4 18.87 119 -0.04 99
IV.NRCA.HNZ. 2021-05-11T17:40:52.08 0.3 undecidable manual S 137 5.0949 154 0.22 73
IV.MMO1.EHZ. 2021-05-11T17:40:52.40 0.1 negative manual P 80 21.0678 116 -0.15 96
IT.MTCL.HGZ. 2021-05-11T17:40:51.54 0.1 undecidable manual P 337 15.2736 124 0 100
IV.FEMA.HNZ. 2021-05-11T17:40:51.08 0.1 undecidable manual P 350 10.6782 134 0.24 96
IV.NRCA.HNZ. 2021-05-11T17:40:50.47 0.1 positive manual P 137 5.0949 154 0.31 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.1 0.002133648 0.1024 AML other m 2021-05-11T17:40:52.13
IV.NRCA.HHN. ML:2.2 0.0023924405 0.0896 AML other m 2021-05-11T17:40:52.18
IV.NRCA.HNE. ML:1.9 0.0012349505 0.128 AML other m 2021-05-11T17:40:52.20
IV.NRCA.HHE. ML:1.9 0.001421748 0.0768 AML other m 2021-05-11T17:40:52.30
IV.FEMA.HNE. ML:2.0 0.0011509385000000002 0.1664 AML other m 2021-05-11T17:40:53.53
IV.FEMA.HNN. ML:2.0 0.001318319 0.1024 AML other m 2021-05-11T17:40:53.91
IV.FDMO.HHN. ML:1.7 0.0003520818 0.0896 AML other m 2021-05-11T17:40:55.55
IV.FDMO.HHE. ML:1.6 0.00028168234999999996 0.1152 AML other m 2021-05-11T17:40:55.62
IV.CESI.HNE. ML:1.3 0.00014428152999999998 0.128 AML other m 2021-05-11T17:40:55.81
IV.CESI.HHN. ML:1.5 0.00025168075 0.1408 AML other m 2021-05-11T17:40:55.96
IV.CESI.HNN. ML:1.5 0.00023693328000000004 0.1408 AML other m 2021-05-11T17:40:55.96
IV.CESI.HHE. ML:1.3 0.0001379948 0.1024 AML other m 2021-05-11T17:40:56.99
IV.GAVE.EHN. ML:1.8 0.0003775 0.16 AML other m 2021-05-11T17:40:57.16
IV.GAVE.EHE. ML:1.9 0.0004465642 0.1536 AML other m 2021-05-11T17:40:57.54
IV.GAVE.HNE. ML:1.9 0.00043300995000000004 0.1664 AML other m 2021-05-11T17:40:57.54
IV.CSP1.EHE. ML:1.8 0.00033973399999999996 0.192 AML other m 2021-05-11T17:40:58.18
IV.LNSS.HHE. ML:1.7 0.00026526355000000004 0.1152 AML other m 2021-05-11T17:40:58.65
IV.LNSS.HNE. ML:1.7 0.00026154710000000003 0.128 AML other m 2021-05-11T17:40:58.66
IV.LNSS.HHN. ML:1.7 0.00023764905 0.1536 AML other m 2021-05-11T17:40:58.87
IV.MTRA.HNN. ML:1.7 0.00023764965 0.2432 AML other m 2021-05-11T17:40:58.97
IV.MTRA.EHN. ML:1.7 0.0002385 0.24 AML other m 2021-05-11T17:40:58.85
IV.LNSS.HNN. ML:1.6 0.0002113032 0.128 AML other m 2021-05-11T17:40:58.93
IV.CSP1.EHN. ML:1.8 0.00030542579999999996 0.3968 AML other m 2021-05-11T17:40:59.53
IV.MTRA.EHE. ML:1.4 0.00011631850500000001 0.3456 AML other m 2021-05-11T17:40:59.72
IV.GUMA.HHE. ML:1.5 0.000156 0.3 AML other m 2021-05-11T17:41:00.81
IV.MF5.EHN. ML:1.3 0.00008956973 0.4736 AML other m 2021-05-11T17:41:00.68
IV.ASSB.HHN. ML:1.5 0.000111 0.18 AML other m 2021-05-11T17:41:01.25
IV.ASSB.HHE. ML:1.6 0.0001398839 0.1792 AML other m 2021-05-11T17:41:01.31
IV.GUMA.HHN. ML:1.6 0.00019700000000000002 0.4 AML other m 2021-05-11T17:41:01.60
IV.GUMA.HNN. ML:1.6 0.00017792281999999998 0.4608 AML other m 2021-05-11T17:41:02.00
IV.SMA1.EHE. ML:1.1 0.00005350452 0.2304 AML other m 2021-05-11T17:41:02.05
IV.GUMA.HNE. ML:1.6 0.00020493815 0.6016 AML other m 2021-05-11T17:41:02.39
IV.RM33.EHE. ML:1.3 0.00006191416 0.3072 AML other m 2021-05-11T17:41:02.92
IV.RM33.EHN. ML:1.1 0.00004475 1 AML other m 2021-05-11T17:41:02.97
IV.SMA1.EHN. ML:1.2 0.00006725000000000001 0.26 AML other m 2021-05-11T17:41:04.28
IV.TERO.HHN. ML:1.3 0.000051588420000000004 0.0768 AML other m 2021-05-11T17:41:04.56
IV.CING.HNN. ML:3.4 0.0054185595 0.8832 AML other m 2021-05-11T17:41:06.37
IV.CING.HHE. ML:1.4 0.00005450000000000001 1.8 AML other m 2021-05-11T17:41:06.06
IV.ATCC.EHN. ML:1.1 0.000033049984999999996 0.2688 AML other m 2021-05-11T17:41:07.15
IV.CING.HHN. ML:1.2 0.000034050725 0.1792 AML other m 2021-05-11T17:41:07.49
IV.FOSV.EHE. ML:0.9 0.000017644285 0.1536 AML other m 2021-05-11T17:41:09.15
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