Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 23-03-2021 and time 04:57:55 (Italy) in region 4 km SE Rignano Flaminio (RM)

A magnitude ML 1.6 earthquake occured in region: 4 km SE Rignano Flaminio (RM), on

  • 23-03-2021 03:57:55 (UTC)
  • 23-03-2021 04:57:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.1910, 12.5260 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Rignano Flaminio RM 4 10277 10277
Civitella San Paolo RM 5 2066 12343
Sant'Oreste RM 5 3687 16030
Morlupo RM 6 8696 24726
Capena RM 6 10592 35318
Fiano Romano RM 6 15360 50678
Castelnuovo di Porto RM 7 8630 59308
Nazzano RM 7 1436 60744
Faleria VT 8 2179 62923
Magliano Romano RM 8 1448 64371
Ponzano Romano RM 9 1155 65526
Calcata VT 9 918 66444
Torrita Tiberina RM 9 1089 67533
Filacciano RM 9 477 68010
Mazzano Romano RM 11 3165 71175
Riano RM 11 10466 81641
Sacrofano RM 11 7740 89381
Stimigliano RI 13 2328 91709
Campagnano di Roma RM 13 11571 103280
Forano RI 13 3179 106459
Castel Sant'Elia VT 15 2683 109142
Civita Castellana VT 15 16491 125633
Montopoli di Sabina RI 15 4210 129843
Poggio Mirteto RI 16 6315 136158
Nepi VT 16 9687 145845
Formello RM 16 12918 158763
Collevecchio RI 16 1577 160340
Selci RI 17 1106 161446
Cantalupo in Sabina RI 17 1685 163131
Fara in Sabina RI 17 13742 176873
Monterotondo RM 17 40830 217703
Monterosi VT 18 4448 222151
Poggio Catino RI 18 1341 223492
Castelnuovo di Farfa RI 19 1059 224551
Montelibretti RM 19 5323 229874
Toffia RI 19 1058 230932
Tarano RI 19 1444 232376
Magliano Sabina RI 19 3774 236150
Mentana RM 20 22921 259071
Salisano RI 20 567 259638
Mompeo RI 20 530 260168

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of Guidonia Montecelio (88673 inhabitants)
33 Km N of Roma (2864731 inhabitants)
34 Km NW of Tivoli (56533 inhabitants)
42 Km S of Terni (111501 inhabitants)
43 Km SE of Viterbo (67173 inhabitants)
52 Km NE of Fiumicino (78395 inhabitants)
58 Km N of Pomezia (62966 inhabitants)
60 Km NW of Velletri (53303 inhabitants)
61 Km E of Civitavecchia (52991 inhabitants)
67 Km N of Aprilia (73446 inhabitants)
74 Km W of L'Aquila (69753 inhabitants)
83 Km N of Anzio (54211 inhabitants)
86 Km NW of Latina (125985 inhabitants)
86 Km S of Foligno (57155 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 2021-03-23
03:57:55		 42.1907 12.526 10 2021-07-12
16:55:17		 Bollettino Sismico Italiano INGV 92156351
Reviewed
Rev100 		ML 1.6 2021-03-23
03:57:56		 42.2015 12.5315 11 2021-03-23
04:13:15		 Sala Sismica INGV-Roma 88398881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-23 03:57:55 ± 0.08
Latitude 42.1907 ± 0.0036
Longitude 12.5260 ± 0.0061
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 92156351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 480
Semi-minor axis of confidence ellipse (meter) 288
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) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 33
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.87054
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 92156351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-02 15:56:16

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 88398881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-23 04:13:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGR.HHZ. 2021-03-23T03:59:32.42 3.0 undecidable manual Sg 6.08 0
IV.SERM.HNZ. 2021-03-23T03:59:21.89 3.0 undecidable manual Sn 2.38 0
IV.CDRU.HHZ. 2021-03-23T03:59:17.58 3.0 undecidable manual Sg 0.4 0
IV.CET2.HHZ. 2021-03-23T03:59:01.71 3.0 undecidable manual Pg 6.28 0
IV.VITU.HNZ. 2021-03-23T03:58:57.70 3.0 undecidable manual Sg 0.71 0
IX.STN3.HHZ.02 2021-03-23T03:58:47.44 3.0 negative manual Pg 3.53 0
IV.PTRJ.HHZ. 2021-03-23T03:58:26.90 3.0 undecidable manual Pn -0.96 0
IV.CESI.HHE. 2021-03-23T03:58:25.15 0.6 undecidable manual S 19 95.4378 50 1.03 32
IV.NRCA.HHZ. 2021-03-23T03:58:21.82 0.6 undecidable manual S 34 86.0472 50 0.23 43
IV.GAVE.EHZ. 2021-03-23T03:58:15.75 0.6 undecidable manual S 28 63.2922 50 0.23 45
IV.LNSS.HNZ. 2021-03-23T03:58:15.18 0.6 undecidable manual S 42 62.1933 50 -0.05 47
IV.RCAV.EHZ. 2021-03-23T03:58:13.14 0.6 undecidable manual S 138 51.4152 50 0.78 39
IV.MC2.EHZ. 2021-03-23T03:58:12.25 0.3 undecidable manual P 34 96.6255 50 -0.14 64
IV.CESI.HHE. 2021-03-23T03:58:11.89 0.3 undecidable manual P 19 95.4378 50 -0.33 62
IV.MGAB.HHZ. 2021-03-23T03:58:11.10 0.3 undecidable manual P 337 86.9463 50 0.19 65
IV.CESX.HHZ. 2021-03-23T03:58:11.86 0.6 undecidable manual S 6 46.62 50 0.79 39
IV.FIAM.HNN. 2021-03-23T03:58:11.94 0.6 undecidable manual S 80 49.3173 50 0.15 47
IV.CERT.HHZ. 2021-03-23T03:58:11.12 0.6 undecidable manual S 125 46.1205 50 0.18 47
IV.ARRO.EHZ. 2021-03-23T03:58:11.31 0.6 undecidable manual S 24 47.3193 50 0.04 48
IV.NRCA.HHZ. 2021-03-23T03:58:10.40 0.3 undecidable manual P 34 86.0472 50 -0.37 63
IV.LATB.EHZ. 2021-03-23T03:58:10.52 0.3 undecidable manual P 155 85.248 50 -0.13 66
IV.BARO.EHZ. 2021-03-23T03:58:09.36 0.3 undecidable manual S 279 39.5271 50 0.18 71
IV.MOMA.HNZ. 2021-03-23T03:58:08.00 0.3 undecidable manual P 3 68.0763 50 -0.01 70
IV.LNSS.HNZ. 2021-03-23T03:58:06.72 0.3 undecidable manual P 42 62.1933 50 -0.37 65
IV.GAVE.EHZ. 2021-03-23T03:58:06.98 0.1 undecidable manual P 28 63.2922 50 -0.28 89
IV.LAV9.HHZ. 2021-03-23T03:58:06.99 0.3 undecidable manual P 166 58.6968 50 0.44 65
IV.RCAV.EHZ. 2021-03-23T03:58:05.37 0.3 undecidable manual P 138 51.4152 50 -0.06 71
IV.MTCE.HHZ. 2021-03-23T03:58:05.39 0.3 undecidable manual S 136 25.752 50 -0.12 74
IV.ARRO.EHZ. 2021-03-23T03:58:04.65 0.1 undecidable manual P 24 47.3193 50 -0.16 94
IV.RMP.HHZ. 2021-03-23T03:58:04.94 3.0 negative manual P -1.22 0
IV.MA9.HHE. 2021-03-23T03:58:04.84 0.6 undecidable manual P 167 47.9187 50 -0.06 48
IV.SAMA.EHZ. 2021-03-23T03:58:04.89 3.0 positive manual P -1.27 0
IV.CESX.HHZ. 2021-03-23T03:58:04.29 0.1 undecidable manual P 6 46.62 50 -0.4 89
IV.FIAM.HNN. 2021-03-23T03:58:04.84 0.3 undecidable manual P 80 49.3173 50 -0.27 69
IV.CERT.HHZ. 2021-03-23T03:58:04.42 0.3 undecidable manual P 125 46.1205 50 -0.2 70
IV.TOLF.HHZ. 2021-03-23T03:58:04.44 0.6 undecidable manual P 252 45.5211 50 -0.08 48
IV.BARO.EHZ. 2021-03-23T03:58:03.51 0.3 undecidable manual P 279 39.5271 50 -0.09 72
IT.MMP1.HGN. 2021-03-23T03:58:03.75 0.3 undecidable manual S 70 19.3695 118 0.17 74
IV.MTCE.HHZ. 2021-03-23T03:58:01.44 0.1 positive manual P 136 25.752 50 -0.04 100
IT.MMP1.HGN. 2021-03-23T03:58:00.40 0.3 undecidable manual P 70 19.3695 118 0.04 76
IV.SRES.HHZ. 2021-03-23T03:57:59.99 0.3 undecidable manual S 346 5.2947 152 0.03 78
IV.SRES.HHZ. 2021-03-23T03:57:58.52 0.1 undecidable manual P 346 5.2947 152 0.24 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SRES.HHN. ML:2.0 0.0017902455000000002 0.3008 AML other m 2021-03-23T03:58:00.56
IV.SRES.HHE. ML:2.0 0.0014700045 0.16 AML other m 2021-03-23T03:58:00.64
IV.MTCE.HHN. ML:1.7 0.0002585 0.26 AML other m 2021-03-23T03:58:05.61
IV.MTCE.HHE. ML:1.7 0.000311 0.24 AML other m 2021-03-23T03:58:06.10
IV.TOLF.HHE. ML:1.4 0.000067042245 0.5792 AML other m 2021-03-23T03:58:11.20
IV.BARO.EHN. ML:1.4 0.00008669999999999999 0.42 AML other m 2021-03-23T03:58:11.22
IV.CERT.HHE. ML:1.4 0.0000674 1.5 AML other m 2021-03-23T03:58:12.98
IV.ARRO.EHE. ML:1.4 0.00006495916 0.1184 AML other m 2021-03-23T03:58:12.60
IV.CERT.HHN. ML:1.5 0.00010125000000000001 1.58 AML other m 2021-03-23T03:58:13.99
IV.ARRO.EHN. ML:1.7 0.0001565 0.18 AML other m 2021-03-23T03:58:13.77
IV.BARO.EHE. ML:1.4 0.0000791 0.42 AML other m 2021-03-23T03:58:14.54
IV.CESX.HHN. ML:1.5 0.00009495 1.5 AML other m 2021-03-23T03:58:15.05
IV.CERT.HNE. ML:1.8 0.0001737011 0.112 AML other m 2021-03-23T03:58:16.60
IV.GAVE.HNE. ML:1.9 0.00014174166099999998 0.2016 AML other m 2021-03-23T03:58:16.79
IV.GAVE.EHE. ML:1.8 0.00013473705 0.1792 AML other m 2021-03-23T03:58:16.89
IV.GAVE.EHN. ML:2.0 0.00017914955 1.6416 AML other m 2021-03-23T03:58:17.84
IV.CESX.HHE. ML:1.5 0.0000837 0.42 AML other m 2021-03-23T03:58:20.89
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