Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 02-04-2021 and time 09:02:23 (UTC) in region 4 km S Cantalice (RI)

A magnitude ML 1.0 earthquake occured in region: 4 km S Cantalice (RI), on

  • 02-04-2021 09:02:23 (UTC)
  • 02-04-2021 11:02:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4320, 12.9110 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Cantalice RI 4 2755 2755
Rieti RI 5 47698 50453
Cittaducale RI 6 6828 57281
Poggio Bustone RI 8 2055 59336
Rivodutri RI 10 1253 60589
Castel Sant'Angelo RI 11 1308 61897
Greccio RI 12 1558 63455
Contigliano RI 12 3783 67238
Micigliano RI 12 127 67365
Morro Reatino RI 12 373 67738
Borgo Velino RI 13 972 68710
Belmonte in Sabina RI 13 636 69346
Colli sul Velino RI 13 533 69879
Concerviano RI 14 291 70170
Labro RI 14 374 70544
Antrodoco RI 14 2588 73132
Leonessa RI 15 2435 75567
Monte San Giovanni in Sabina RI 16 714 76281
Rocca Sinibalda RI 18 815 77096
Polino TR 18 233 77329
Longone Sabino RI 18 597 77926
Posta RI 18 694 78620
Montenero Sabino RI 19 299 78919
Cottanello RI 19 563 79482
Torricella in Sabina RI 19 1342 80824
Montasola RI 20 395 81219
Petrella Salto RI 20 1197 82416

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SE of Terni (111501 inhabitants)
41 Km W of L'Aquila (69753 inhabitants)
50 Km NE of Guidonia Montecelio (88673 inhabitants)
53 Km N of Tivoli (56533 inhabitants)
61 Km S of Foligno (57155 inhabitants)
66 Km E of Viterbo (67173 inhabitants)
69 Km NE of Roma (2864731 inhabitants)
70 Km W of Teramo (54892 inhabitants)
84 Km N of Velletri (53303 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
91 Km NE of Pomezia (62966 inhabitants)
92 Km NE of Fiumicino (78395 inhabitants)
96 Km N of Aprilia (73446 inhabitants)
99 Km E of Civitavecchia (52991 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
Reviewed
Rev100 		ML 1.0 2021-04-02
09:02:23		 42.4322 12.9108 11 2021-04-02
09:11:06		 Sala Sismica INGV-Roma 88704071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-02 09:02:23 ± 0.1
Latitude 42.4322 ± 0.0045
Longitude 12.9108 ± 0.0061
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88704071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 548
Semi-minor axis of confidence ellipse (meter) 444
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 251
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 187
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25990
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 88704071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-02 09:11:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TREG.EHZ. 2021-04-02T09:04:05.07 3.0 undecidable manual Sg 11.7 0
GU.CANO.HHZ. 2021-04-02T09:04:03.26 3.0 undecidable manual Sn -2.34 0
IV.MNTV.EHZ. 2021-04-02T09:03:55.13 3.0 undecidable manual Sg 7.05 0
AC.VLO.HHZ. 2021-04-02T09:03:40.58 3.0 undecidable manual Pn 1.3 0
IV.PZUN.HHZ. 2021-04-02T09:03:38.77 3.0 undecidable manual Sn 1.28 0
GU.GSCL.HHZ. 2021-04-02T09:03:36.99 3.0 undecidable manual Sn 2.67 0
IV.VISG.HHZ. 2021-04-02T09:03:31.76 3.0 undecidable manual Sg 9.58 0
IV.MCPD.HHZ. 2021-04-02T09:03:30.15 3.0 negative manual Pn 2.06 0
IV.GIZZ.HHZ. 2021-04-02T09:03:26.00 3.0 positive manual Pn 1.54 0
IV.VOBA.EHZ. 2021-04-02T09:03:23.54 3.0 positive manual Pg 5.74 0
IV.FIR.HHZ. 2021-04-02T09:03:13.22 3.0 undecidable manual Sn -2.79 0
IV.AGLI.HHZ. 2021-04-02T09:03:10.92 3.0 undecidable manual Pn 1.62 0
IV.VENT.EHZ. 2021-04-02T09:03:09.91 3.0 undecidable manual Sn 0.11 0
OT.OT14.EHZ. 2021-04-02T09:03:03.15 3.0 negative manual Pg 5.49 0
OT.OT05.EHZ. 2021-04-02T09:02:57.87 3.0 negative manual Pg 2.25 0
IV.ARVD.HHZ. 2021-04-02T09:02:56.75 3.0 undecidable manual Sg -0.91 0
IV.MTMR.EHZ. 2021-04-02T09:02:53.92 3.0 positive manual Pn -1.94 0
IV.PESA.HHZ. 2021-04-02T09:02:50.32 3.0 positive manual Pg 2 0
IT.RMMM.HGZ. 2021-04-02T09:02:34.13 3.0 undecidable manual P -0.63 0
IV.VVLD.HHZ. 2021-04-02T09:02:34.62 3.0 undecidable manual P -1.94 0
IV.RM33.EHZ. 2021-04-02T09:02:33.35 0.3 undecidable manual S 71 26.2515 50 0.03 74
IV.GAVE.EHZ. 2021-04-02T09:02:33.93 0.3 undecidable manual S 357 28.8489 50 -0.09 73
IV.FIAM.HHZ. 2021-04-02T09:02:32.76 0.3 undecidable manual S 137 24.8529 50 -0.18 72
IV.LNSS.HHZ. 2021-04-02T09:02:32.04 0.3 undecidable manual S 29 21.6672 116 -0.05 75
IV.ARRO.EHZ. 2021-04-02T09:02:31.45 0.3 undecidable manual S 324 20.1687 118 -0.17 73
IV.GAVE.EHZ. 2021-04-02T09:02:29.92 0.3 undecidable manual P 357 28.8489 50 0.25 71
IV.FIAM.HHZ. 2021-04-02T09:02:29.29 0.6 undecidable manual P 137 24.8529 50 0.24 48
IV.RM33.EHZ. 2021-04-02T09:02:29.17 0.1 undecidable manual P 71 26.2515 50 -0.09 98
IV.ARRO.EHZ. 2021-04-02T09:02:28.33 0.1 undecidable manual P 324 20.1687 118 0.05 100
IV.LNSS.HHZ. 2021-04-02T09:02:28.69 0.3 undecidable manual P 29 21.6672 116 0.13 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:0.9 0.000038712085 0.16 AML other m 2021-04-02T09:02:33.63
IV.RM33.EHE. ML:1.0 0.00004878715 0.2176 AML other m 2021-04-02T09:02:34.57
IV.RM33.HNE. ML:1.3 0.00009828173000000001 0.1024 AML other m 2021-04-02T09:02:33.89
IV.RM33.HNN. ML:1.0 0.000047633864999999996 0.5888 AML other m 2021-04-02T09:02:33.71
IV.GAVE.EHE. ML:0.8 0.000037029740000000005 0.1792 AML other m 2021-04-02T09:02:34.48
IV.GAVE.EHN. ML:0.6 0.000022497503500000002 0.1792 AML other m 2021-04-02T09:02:34.74
IV.GAVE.HNE. ML:1.1 0.00005833124 0.7424 AML other m 2021-04-02T09:02:34.56
IV.GAVE.HNN. ML:1.6 0.00020794489999999998 1.216 AML other m 2021-04-02T09:02:34.63
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