Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 09-04-2021 and time 16:15:29 (Italy) in region 3 km E Norcia (PG)

A magnitude ML 1.4 earthquake occured in region: 3 km E Norcia (PG), on

  • 09-04-2021 14:15:29 (UTC)
  • 09-04-2021 16:15:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8000, 13.1250 at 9 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
Norcia PG 3 4957 4957
Castelsantangelo sul Nera MC 11 281 5238
Preci PG 11 724 5962
Cascia PG 13 3217 9179
Arquata del Tronto AP 14 1178 10357
Visso MC 15 1107 11464
Accumoli RI 15 667 12131
Ussita MC 16 444 12575
Cerreto di Spoleto PG 17 1075 13650
Montegallo AP 18 523 14173
Poggiodomo PG 18 117 14290
Sellano PG 19 1079 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km W of Pescara (121014 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
99 Km NW of Chieti (51815 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 1.4 2021-04-09
14:15:29		 42.8002 13.125 9 2021-07-12
16:55:13		 Bollettino Sismico Italiano INGV 90722071
Reviewed
Rev100 		ML 1.4 2021-04-09
14:15:29		 42.8032 13.1188 9 2021-04-09
14:21:40		 Sala Sismica INGV-Roma 88943941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-09 14:15:29 ± 0.06
Latitude 42.8002 ± 0.0027
Longitude 13.1250 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90722071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 421
Semi-minor axis of confidence ellipse (meter) 142
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 70
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) 68
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) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.03417
Epicentral distance of station farthest from the epicenter (degree) 0.52880
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 33
Type of magnitude ML
Reference to an origin 90722071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-05 00:36:32

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 88943941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-09 14:21:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-04-09T14:15:41.03 0.6 undecidable manual S 11 33.0447 50 -0.02 49
IV.RM33.EHZ. 2021-04-09T14:15:40.75 0.6 undecidable manual S 167 33.1446 50 -0.34 46
IV.EL6.EHZ. 2021-04-09T14:15:40.10 0.3 undecidable manual P 358 58.6968 50 0.02 71
IV.CESI.HHZ. 2021-04-09T14:15:39.81 0.6 undecidable manual S 322 28.9488 108 -0.1 49
IV.FDMO.HHZ. 2021-04-09T14:15:39.58 0.6 undecidable manual S 353 26.3514 109 0.5 45
IV.GAVE.EHZ. 2021-04-09T14:15:38.05 0.6 undecidable manual S 238 22.2555 112 0.3 47
IV.LNSS.HHZ. 2021-04-09T14:15:38.04 0.6 undecidable manual S 198 22.9548 112 0.07 50
IV.SMA1.EHN. 2021-04-09T14:15:38.83 0.6 undecidable manual S 138 25.4523 110 0.05 50
IT.MTCL.HGE. 2021-04-09T14:15:38.00 0.6 undecidable manual S 335 23.754 111 -0.23 48
IV.ASSB.HHZ. 2021-04-09T14:15:38.11 0.3 undecidable manual P 306 46.4202 50 -0.08 71
IV.T1299.HNN. 2021-04-09T14:15:38.15 0.6 undecidable manual S 145 22.4553 112 0.35 47
IV.MTRA.EHZ. 2021-04-09T14:15:37.73 0.6 undecidable manual S 102 22.6551 112 -0.13 49
IV.TERO.HHZ. 2021-04-09T14:15:37.44 0.3 undecidable manual P 117 43.7229 50 -0.33 68
IV.MMO1.EHZ. 2021-04-09T14:15:36.70 0.6 undecidable manual S 56 19.7691 115 -0.25 48
IV.FEMA.HNE. 2021-04-09T14:15:36.89 0.6 undecidable manual S 341 18.9699 116 0.19 49
IV.CSP1.EHZ. 2021-04-09T14:15:36.03 0.3 undecidable manual P 11 33.0447 50 -0.09 73
IV.MF5.EHZ. 2021-04-09T14:15:36.94 0.3 undecidable manual P 52 34.2435 50 0.63 63
IV.CESI.HHZ. 2021-04-09T14:15:35.35 0.1 undecidable manual P 322 28.9488 108 -0.11 97
IV.MC2.EHZ. 2021-04-09T14:15:35.40 0.6 undecidable manual S 23 13.3755 125 0.38 47
IV.RM33.EHZ. 2021-04-09T14:15:35.89 0.1 undecidable manual P 167 33.1446 50 -0.25 94
IV.MTRA.EHZ. 2021-04-09T14:15:34.29 0.3 undecidable manual P 102 22.6551 112 0.01 75
IV.SMA1.EHN. 2021-04-09T14:15:34.86 0.3 undecidable manual P 138 25.4523 110 0.05 74
IV.FDMO.HHZ. 2021-04-09T14:15:34.70 0.3 undecidable manual P 353 26.3514 109 -0.28 71
IV.T1299.HNN. 2021-04-09T14:15:34.40 0.1 undecidable manual P 145 22.4553 112 0.16 97
IT.MTCL.HGE. 2021-04-09T14:15:34.47 0.6 undecidable manual P 335 23.754 111 -0.02 50
IV.GAVE.EHZ. 2021-04-09T14:15:34.39 0.1 undecidable manual P 238 22.2555 112 0.18 97
IV.LNSS.HHZ. 2021-04-09T14:15:34.40 0.3 undecidable manual P 198 22.9548 112 0.06 74
IV.MMO1.EHZ. 2021-04-09T14:15:33.69 0.1 undecidable manual P 56 19.7691 115 -0.06 100
IV.FEMA.HNE. 2021-04-09T14:15:33.97 0.3 undecidable manual P 341 18.9699 116 0.36 70
IV.MC2.EHZ. 2021-04-09T14:15:32.98 0.3 undecidable manual P 23 13.3755 125 0.34 71
IV.NRCA.HNZ. 2021-04-09T14:15:31.02 0.1 negative manual P 347 3.7962 158 -0.36 96
IV.NRCA.HNZ. 2021-04-09T14:15:31.70 0.6 undecidable manual S 347 3.7962 158 -1.14 35
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNN. ML:1.5 0.00019276280000000002 0.8 AML other m 2021-04-09T14:15:36.55
IV.MTRA.HNN. ML:1.4 0.00017669855 0.2624 AML other m 2021-04-09T14:15:38.30
IV.LNSS.HHN. ML:1.3 0.00013270256 0.1984 AML other m 2021-04-09T14:15:39.07
IV.MTRA.EHN. ML:1.4 0.0001720083 0.2432 AML other m 2021-04-09T14:15:39.43
IV.MTRA.EHE. ML:1.5 0.0001897748 0.3008 AML other m 2021-04-09T14:15:39.86
IV.LNSS.HNE. ML:1.3 0.000129042 0.1216 AML other m 2021-04-09T14:15:39.83
IV.LNSS.HHE. ML:1.3 0.00013781895 0.1216 AML other m 2021-04-09T14:15:39.89
IV.GAVE.EHN. ML:1.5 0.00023 0.26 AML other m 2021-04-09T14:15:40.09
IV.CESI.HHN. ML:1.7 0.00027249999999999996 0.34 AML other m 2021-04-09T14:15:40.13
IV.CESI.HNN. ML:1.7 0.0002812128 0.352 AML other m 2021-04-09T14:15:40.12
IV.CESI.HNE. ML:1.4 0.0001320826 0.3392 AML other m 2021-04-09T14:15:40.20
IV.GAVE.EHE. ML:1.5 0.00020555455000000002 0.2368 AML other m 2021-04-09T14:15:40.76
IV.GAVE.HNE. ML:1.5 0.00019440410000000002 0.224 AML other m 2021-04-09T14:15:40.76
IV.FDMO.HHN. ML:1.1 0.00007291647 1.8592 AML other m 2021-04-09T14:15:40.04
IV.RM33.EHN. ML:1.6 0.000155 0.24 AML other m 2021-04-09T14:15:41.22
IV.FDMO.HHE. ML:1.1 0.00006780018000000001 0.1216 AML other m 2021-04-09T14:15:41.20
IV.CESI.HHE. ML:1.4 0.00012882575 0.1984 AML other m 2021-04-09T14:15:41.23
IV.MTRA.HNE. ML:1.5 0.00019078184999999997 0.4224 AML other m 2021-04-09T14:15:41.25
IV.RM33.HNN. ML:1.6 0.00015910215 0.2304 AML other m 2021-04-09T14:15:41.33
IV.RM33.HNE. ML:1.5 0.0001462626 0.2752 AML other m 2021-04-09T14:15:42.19
IV.RM33.EHE. ML:1.4 0.0001129 0.18 AML other m 2021-04-09T14:15:42.32
IV.CSP1.EHE. ML:1.5 0.00012768334 0.2432 AML other m 2021-04-09T14:15:42.31
IV.CSP1.EHN. ML:1.6 0.00016710185 0.2176 AML other m 2021-04-09T14:15:42.86
IV.MF5.EHE. ML:1.2 0.00006615083999999999 1.5008 AML other m 2021-04-09T14:15:44.14
IV.TERO.HHN. ML:1.1 0.00003923171 0.1024 AML other m 2021-04-09T14:15:44.59
IV.TERO.HHE. ML:1.0 0.000037142069999999996 0.2432 AML other m 2021-04-09T14:15:47.05
IV.ASSB.HHN. ML:1.2 0.00005044999999999999 0.2 AML other m 2021-04-09T14:15:47.61
IV.ASSB.HHE. ML:1.1 0.000040063765 0.32 AML other m 2021-04-09T14:15:48.29
IV.MF5.EHN. ML:1.2 0.00007515801999999999 0.4608 AML other m 2021-04-09T14:15:49.96
IV.EL6.EHE. ML:1.3 0.000038097119 0.1152 AML other m 2021-04-09T14:15:51.09
IV.TERO.HNN. ML:1.6 0.0001232962 0.6208 AML other m 2021-04-09T14:15:51.28
IV.TERO.HNE. ML:1.7 0.00015616306 1.1808 AML other m 2021-04-09T14:15:52.31
IV.EL6.EHN. ML:1.3 0.000046196695 0.1984 AML other m 2021-04-09T14:15:52.82
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