Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 02-02-2021 and time 17:45:49 (Italy) in region 5 km S Leonessa (RI)

A magnitude ML 1.1 earthquake occured in region: 5 km S Leonessa (RI), on

  • 02-02-2021 16:45:49 (UTC)
  • 02-02-2021 17:45:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5170, 12.9690 at 11 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
Leonessa RI 5 2435 2435
Poggio Bustone RI 7 2055 4490
Cantalice RI 8 2755 7245
Rivodutri RI 9 1253 8498
Micigliano RI 10 127 8625
Posta RI 11 694 9319
Morro Reatino RI 11 373 9692
Polino TR 13 233 9925
Borbona RI 14 617 10542
Labro RI 14 374 10916
Antrodoco RI 14 2588 13504
Borgo Velino RI 14 972 14476
Castel Sant'Angelo RI 14 1308 15784
Cittaducale RI 15 6828 22612
Rieti RI 15 47698 70310
Monteleone di Spoleto PG 15 599 70909
Colli sul Velino RI 16 533 71442
Greccio RI 18 1558 73000
Arrone TR 18 2763 75763
Ferentillo TR 19 1913 77676
Montefranco TR 19 1276 78952
Cittareale RI 19 482 79434

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Terni (111501 inhabitants)
40 Km W of L'Aquila (69753 inhabitants)
54 Km SE of Foligno (57155 inhabitants)
61 Km NE of Guidonia Montecelio (88673 inhabitants)
62 Km W of Teramo (54892 inhabitants)
63 Km N of Tivoli (56533 inhabitants)
72 Km E of Viterbo (67173 inhabitants)
80 Km NE of Roma (2864731 inhabitants)
81 Km SE of Perugia (166134 inhabitants)
94 Km N of Velletri (53303 inhabitants)
97 Km W of Montesilvano (53738 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 1.1 2021-02-02
16:45:49		 42.5168 12.9692 11 2021-02-02
16:53:14		 Sala Sismica INGV-Roma 86788491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-02 16:45:49 ± 0.09
Latitude 42.5168 ± 0.0045
Longitude 12.9692 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86788491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 479
Semi-minor axis of confidence ellipse (meter) 433
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
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) 137
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 19
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41009
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 86788491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-02 16:53:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HNN. 2021-02-02T16:46:04.31 0.3 undecidable manual S 314 45.5211 50 0.22 69
IV.MTRA.EHE. 2021-02-02T16:46:03.35 0.3 undecidable manual S 53 43.8228 50 -0.29 68
IV.NRCA.HHZ. 2021-02-02T16:46:01.49 0.3 undecidable manual S 19 37.0296 50 -0.34 68
IV.CAMP.HHZ. 2021-02-02T16:46:00.92 3.0 undecidable manual S 0
IV.SMA1.EHZ. 2021-02-02T16:46:00.78 0.3 undecidable manual S 67 32.4453 50 0.18 71
IV.CESX.HHZ. 2021-02-02T16:46:00.51 3.0 undecidable manual S 0
IV.FIAM.HHZ. 2021-02-02T16:45:59.91 0.3 undecidable manual S 156 30.1476 50 -0.07 73
IV.T1299.EHN. 2021-02-02T16:45:59.75 0.3 undecidable manual S 63 28.6491 50 0.16 72
IV.TERO.HHZ. 2021-02-02T16:45:58.84 1.0 undecidable manual Pg -0.6 0.5
IV.MOMA.HNN. 2021-02-02T16:45:58.27 0.1 undecidable manual P 314 45.5211 50 0.38 89
IV.MTRA.EHE. 2021-02-02T16:45:57.35 0.1 undecidable manual P 53 43.8228 50 -0.28 91
IV.RM33.EHZ. 2021-02-02T16:45:57.29 0.3 undecidable manual S 92 20.0688 50 0 75
IV.NRCA.HHZ. 2021-02-02T16:45:56.33 0.1 undecidable manual P 19 37.0296 50 -0.25 93
IV.ARRO.EHZ. 2021-02-02T16:45:56.40 0.6 undecidable manual S 293 17.9709 121 -0.3 47
IV.SMA1.EHZ. 2021-02-02T16:45:56.28 0.1 undecidable manual P 67 32.4453 50 0.41 90
IV.FIAM.HHZ. 2021-02-02T16:45:55.44 0.1 undecidable manual P 156 30.1476 50 -0.08 97
IV.T1299.EHN. 2021-02-02T16:45:55.41 0.3 undecidable manual P 63 28.6491 50 0.12 73
IV.LNSS.HHZ. 2021-02-02T16:45:54.88 0.3 undecidable manual S 31 11.1777 134 0.07 76
IV.ARRO.EHZ. 2021-02-02T16:45:53.52 0.1 undecidable manual P 293 17.9709 121 -0.1 99
IV.RM33.EHZ. 2021-02-02T16:45:53.93 0.1 undecidable manual P 92 20.0688 50 -0.03 100
IV.LNSS.HHZ. 2021-02-02T16:45:52.67 0.1 undecidable manual P 31 11.1777 134 0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.2 0.00016 1.58 AML other m 2021-02-02T16:45:55.17
IV.LNSS.HHE. ML:1.1 0.000148 0.12 AML other m 2021-02-02T16:45:55.62
IV.ARRO.EHE. ML:0.9 0.000071 0.22 AML other m 2021-02-02T16:45:56.94
IV.RM33.EHE. ML:1.1 0.0000901 0.66 AML other m 2021-02-02T16:45:57.54
IV.RM33.EHN. ML:0.9 0.00006175 0.18 AML other m 2021-02-02T16:45:57.56
IV.ARRO.EHN. ML:0.9 0.00006455 1.46 AML other m 2021-02-02T16:45:57.07
IV.SMA1.EHE. ML:1.5 0.00014050000000000003 0.54 AML other m 2021-02-02T16:46:01.35
IV.SMA1.EHN. ML:1.1 0.00006185 1.02 AML other m 2021-02-02T16:46:01.00
IV.NRCA.HHE. ML:1.2 0.00005255 1.46 AML other m 2021-02-02T16:46:02.75
IV.NRCA.HHN. ML:1.0 0.00004124999999999999 0.58 AML other m 2021-02-02T16:46:03.14
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