Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 29-04-2021 and time 09:31:33 (Italy) in region 5 km NE Configni (RI)

A magnitude ML 1.8 earthquake occured in region: 5 km NE Configni (RI), on

  • 29-04-2021 07:31:33 (UTC)
  • 29-04-2021 09:31:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4500, 12.6870 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.

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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
Configni RI 5 633 633
Cottanello RI 5 563 1196
Stroncone TR 6 4917 6113
Greccio RI 7 1558 7671
Montasola RI 7 395 8066
Contigliano RI 8 3783 11849
Vacone RI 8 256 12105
Colli sul Velino RI 10 533 12638
Calvi dell'Umbria TR 11 1856 14494
Torri in Sabina RI 11 1256 15750
Montebuono RI 12 883 16633
Casperia RI 12 1246 17879
Labro RI 13 374 18253
Tarano RI 13 1444 19697
Terni TR 13 111501 131198
Roccantica RI 14 563 131761
Morro Reatino RI 15 373 132134
Rieti RI 15 47698 179832
Selci RI 15 1106 180938
Monte San Giovanni in Sabina RI 15 714 181652
Rivodutri RI 16 1253 182905
Cantalupo in Sabina RI 16 1685 184590
Narni TR 16 19785 204375
Arrone TR 16 2763 207138
Collevecchio RI 17 1577 208715
Poggio Catino RI 17 1341 210056
Otricoli TR 17 1869 211925
Poggio Bustone RI 17 2055 213980
Montefranco TR 18 1276 215256
Cantalice RI 18 2755 218011
Forano RI 18 3179 221190
Stimigliano RI 20 2328 223518
Magliano Sabina RI 20 3774 227292
Polino TR 20 233 227525

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km S of Terni (111501 inhabitants)
48 Km E of Viterbo (67173 inhabitants)
50 Km N of Guidonia Montecelio (88673 inhabitants)
55 Km N of Tivoli (56533 inhabitants)
56 Km S of Foligno (57155 inhabitants)
60 Km W of L'Aquila (69753 inhabitants)
64 Km N of Roma (2864731 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
84 Km E of Civitavecchia (52991 inhabitants)
84 Km NE of Fiumicino (78395 inhabitants)
85 Km N of Velletri (53303 inhabitants)
87 Km W of Teramo (54892 inhabitants)
88 Km N of Pomezia (62966 inhabitants)
95 Km N of Aprilia (73446 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 2021-04-29
07:31:33		 42.4497 12.6873 8 2021-07-12
16:55:11		 Bollettino Sismico Italiano INGV 90091881
Reviewed
Rev100 		ML 1.8 2021-04-29
07:31:33		 42.45 12.693 7 2021-04-29
07:38:26		 Sala Sismica INGV-Roma 89580751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-29 07:31:33 ± 0.07
Latitude 42.4497 ± 0.0036
Longitude 12.6873 ± 0.0061
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 90091881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 464
Semi-minor axis of confidence ellipse (meter) 190
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.14209
Epicentral distance of station farthest from the epicenter (degree) 2.02797
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 22
Type of magnitude ML
Reference to an origin 90091881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-20 13:37:12

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 22
Type of magnitude ML
Reference to an origin 89580751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-29 07:38:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.IMOL.HNZ. 2021-04-29T07:32:06.27 3.0 negative manual P 225.108 -2.5 0
IV.CSP1.EHZ. 2021-04-29T07:31:59.36 0.6 undecidable manual S 30 82.7505 50 0.45 43
IV.SACS.HHZ. 2021-04-29T07:31:57.74 1.0 undecidable manual S 305 77.367 50 0.27 22
IV.FDMO.HHZ. 2021-04-29T07:31:56.60 0.6 undecidable manual S 26 72.7716 50 0.35 45
IV.CESI.HHZ. 2021-04-29T07:31:54.40 0.6 undecidable manual S 16 64.0914 50 0.48 44
IV.SMA1.EHZ. 2021-04-29T07:31:52.48 0.6 undecidable manual S 69 56.5989 50 0.55 44
IV.CERT.HHZ. 2021-04-29T07:31:52.90 1.0 undecidable manual S 156 60.5949 50 -0.08 24
IV.ATMI.HHZ. 2021-04-29T07:31:51.81 0.6 undecidable manual P 341 103.9182 50 0.35 42
IV.NRCA.HHZ. 2021-04-29T07:31:50.94 0.6 undecidable manual S 39 55.0005 50 -0.56 44
IV.RM33.EHZ. 2021-04-29T07:31:48.50 0.6 undecidable manual S 81 43.623 50 0.04 50
IV.CSP1.EHZ. 2021-04-29T07:31:48.62 1.0 undecidable manual P 30 82.7505 50 0.41 22
IV.MOMA.HHZ. 2021-04-29T07:31:47.30 0.6 undecidable manual S 346 40.4262 50 -0.31 48
IT.GNU.HGE. 2021-04-29T07:31:47.70 0.6 undecidable manual S 346 40.4262 50 0.09 50
IV.SACS.HHZ. 2021-04-29T07:31:47.64 0.1 undecidable manual P 305 77.367 50 0.26 90
IV.FDMO.HHZ. 2021-04-29T07:31:46.42 0.6 undecidable manual P 26 72.7716 50 -0.25 46
IV.GAVE.EHZ. 2021-04-29T07:31:45.20 0.6 undecidable manual S 32 31.746 104 0.26 49
IV.LNSS.HHZ. 2021-04-29T07:31:45.40 0.6 undecidable manual S 59 33.4443 103 -0.12 50
IV.CESI.HHZ. 2021-04-29T07:31:45.11 0.3 undecidable manual P 16 64.0914 50 -0.22 70
IV.ASSB.HHN. 2021-04-29T07:31:45.28 0.6 undecidable manual P 358 65.7897 50 -0.32 45
IV.CERT.HHZ. 2021-04-29T07:31:44.81 1.0 undecidable manual P 156 60.5949 50 0.02 24
IV.SMA1.EHZ. 2021-04-29T07:31:43.70 0.6 undecidable manual P 69 56.5989 50 -0.48 45
IV.SRES.HHN. 2021-04-29T07:31:43.23 0.6 undecidable manual S 212 27.75 105 -0.34 48
IV.NRCA.HHZ. 2021-04-29T07:31:43.58 0.1 undecidable manual P 39 55.0005 50 -0.35 92
IV.RM33.EHZ. 2021-04-29T07:31:42.12 0.6 positive manual P 81 43.623 50 -0.06 50
IV.MOMA.HHZ. 2021-04-29T07:31:41.28 0.6 undecidable manual P 346 40.4262 50 -0.41 47
IT.GNU.HGE. 2021-04-29T07:31:41.59 0.6 undecidable manual P 346 40.4262 50 -0.09 50
IV.GAVE.EHZ. 2021-04-29T07:31:40.01 0.3 undecidable manual P 32 31.746 104 -0.13 75
IV.CESX.HHZ. 2021-04-29T07:31:40.90 0.6 undecidable manual S 335 19.4694 111 0.05 52
IV.LNSS.HHZ. 2021-04-29T07:31:40.33 0.1 undecidable manual P 59 33.4443 103 -0.15 100
IV.SRES.HHN. 2021-04-29T07:31:39.54 0.3 undecidable manual P 212 27.75 105 0.18 75
IV.ARRO.EHZ. 2021-04-29T07:31:39.70 0.6 undecidable manual S 24 15.7731 116 0.03 53
IT.MMP1.HGE. 2021-04-29T07:31:38.80 0.3 undecidable manual P 167 22.755 109 0.39 73
IV.ARRO.EHZ. 2021-04-29T07:31:37.42 0.3 undecidable manual P 24 15.7731 116 0.32 75
IV.CESX.HHZ. 2021-04-29T07:31:37.59 0.3 negative manual P 335 19.4694 111 -0.19 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.9 0.0008425 0.22 AML other m 2021-04-29T07:31:41.40
IV.ARRO.EHE. ML:1.8 0.0006895 0.64 AML other m 2021-04-29T07:31:43.09
IV.CESX.HHE. ML:1.8 0.0005475 0.36 AML other m 2021-04-29T07:31:46.11
IV.CESX.HHN. ML:1.9 0.0006185 0.32 AML other m 2021-04-29T07:31:46.68
IV.LNSS.HHE. ML:1.9 0.00032900000000000003 0.5 AML other m 2021-04-29T07:31:46.59
IV.LNSS.HHN. ML:1.9 0.00033199999999999994 0.66 AML other m 2021-04-29T07:31:46.41
IV.GAVE.EHN. ML:2.0 0.00047850000000000003 0.68 AML other m 2021-04-29T07:31:47.58
IV.GAVE.EHE. ML:1.8 0.0002935 0.22 AML other m 2021-04-29T07:31:47.88
IV.MOMA.HHE. ML:1.8 0.000225 0.4 AML other m 2021-04-29T07:31:48.27
IV.RM33.EHN. ML:1.6 0.0001147 0.22 AML other m 2021-04-29T07:31:50.14
IV.RM33.EHE. ML:1.7 0.0001585 0.24 AML other m 2021-04-29T07:31:50.63
IV.NRCA.HHE. ML:1.8 0.000132 0.14 AML other m 2021-04-29T07:31:52.12
IV.SMA1.EHE. ML:1.8 0.00014399999999999998 0.38 AML other m 2021-04-29T07:31:53.11
IV.NRCA.HHN. ML:1.6 0.00010625000000000001 0.18 AML other m 2021-04-29T07:31:54.20
IV.SMA1.EHN. ML:1.8 0.0001315 0.44 AML other m 2021-04-29T07:31:54.20
IV.MOMA.HHN. ML:1.7 0.00016649999999999998 0.26 AML other m 2021-04-29T07:31:54.43
IV.CESI.HHE. ML:1.8 0.000117 0.36 AML other m 2021-04-29T07:31:55.64
IV.CESI.HHN. ML:1.8 0.0001305 0.66 AML other m 2021-04-29T07:31:56.98
IV.FDMO.HHE. ML:1.7 0.00007845 0.26 AML other m 2021-04-29T07:31:57.27
IV.CERT.HHN. ML:1.5 0.00005805 0.66 AML other m 2021-04-29T07:31:58.61
IV.FDMO.HHN. ML:1.6 0.00006125 1.84 AML other m 2021-04-29T07:31:59.93
IV.CERT.HHE. ML:1.5 0.00006455 1.58 AML other m 2021-04-29T07:32:00.80
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