Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 06-03-2021 and time 13:56:43 (UTC) in region 3 km SW Polino (TR)

A magnitude ML 1.6 earthquake occured in region: 3 km SW Polino (TR), on

  • 06-03-2021 13:56:43 (UTC)
  • 06-03-2021 14:56:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5720, 12.8140 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
Polino TR 3 233 233
Arrone TR 4 2763 2996
Montefranco TR 5 1276 4272
Labro RI 5 374 4646
Morro Reatino RI 5 373 5019
Ferentillo TR 6 1913 6932
Rivodutri RI 7 1253 8185
Colli sul Velino RI 8 533 8718
Poggio Bustone RI 10 2055 10773
Leonessa RI 12 2435 13208
Greccio RI 14 1558 14766
Cantalice RI 14 2755 17521
Terni TR 14 111501 129022
Monteleone di Spoleto PG 15 599 129621
Stroncone TR 15 4917 134538
Scheggino PG 16 461 134999
Sant'Anatolia di Narco PG 18 564 135563
Contigliano RI 18 3783 139346
Poggiodomo PG 19 117 139463
Rieti RI 19 47698 187161
Spoleto PG 19 38218 225379

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Terni (111501 inhabitants)
44 Km S of Foligno (57155 inhabitants)
54 Km W of L'Aquila (69753 inhabitants)
61 Km E of Viterbo (67173 inhabitants)
64 Km N of Guidonia Montecelio (88673 inhabitants)
68 Km N of Tivoli (56533 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
74 Km W of Teramo (54892 inhabitants)
80 Km NE of Roma (2864731 inhabitants)
98 Km N of Velletri (53303 inhabitants)
99 Km NE 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
Bulletin
Rev1000 		ML 1.6 2021-03-06
13:56:43		 42.5717 12.8137 9 2021-07-12
16:55:14		 Bollettino Sismico Italiano INGV 91105451
Reviewed
Rev100 		ML 1.6 2021-03-06
13:56:43		 42.5762 12.8202 9 2021-03-06
14:01:39		 Sala Sismica INGV-Roma 87821671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-06 13:56:43 ± 0.07
Latitude 42.5717 ± 0.0045
Longitude 12.8137 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91105451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 522
Semi-minor axis of confidence ellipse (meter) 343
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 195
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.03597
Epicentral distance of station farthest from the epicenter (degree) 0.78601
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:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 87821671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-06 14:01:39

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 91105451
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-11 15:59:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MML1.HNE. 2021-03-06T13:57:02.78 0.6 undecidable manual S 12 61.494 50 0.28 44
IV.FDMO.HHZ. 2021-03-06T13:57:01.11 0.6 undecidable manual S 23 56.1993 50 0.02 47
IV.MMO1.EHN. 2021-03-06T13:57:01.33 0.6 undecidable manual S 49 55.4001 50 0.44 43
IV.CESI.HHZ. 2021-03-06T13:56:59.12 0.6 undecidable manual S 9 48.618 50 0.04 47
IV.SMA1.EHZ. 2021-03-06T13:56:58.03 0.6 undecidable manual S 81 43.1235 50 0.43 44
IV.EL6.EHZ. 2021-03-06T13:56:58.45 0.3 undecidable manual P 15 87.246 50 0.12 64
IV.T1299.HNN. 2021-03-06T13:56:56.56 0.6 undecidable manual S 80 38.8278 50 0.08 47
IV.RM33.EHZ. 2021-03-06T13:56:55.04 0.6 undecidable manual S 102 33.4443 50 0 49
IV.NRCA.HHZ. 2021-03-06T13:56:55.87 0.6 undecidable manual S 40 38.0286 50 -0.37 45
IV.CSP1.EHZ. 2021-03-06T13:56:55.21 0.3 undecidable manual P 29 65.8896 50 0.17 66
IV.MOMA.HHZ. 2021-03-06T13:56:54.69 0.6 undecidable manual S 322 32.5452 50 -0.09 48
IV.MML1.HNE. 2021-03-06T13:56:54.21 0.1 undecidable manual P 12 61.494 50 -0.15 90
IV.FDMO.HHZ. 2021-03-06T13:56:53.33 0.3 undecidable manual P 23 56.1993 50 -0.21 67
IV.MMO1.EHN. 2021-03-06T13:56:53.28 0.3 undecidable manual P 49 55.4001 50 -0.14 68
IV.SRES.HHZ. 2021-03-06T13:56:52.78 1.0 undecidable manual P 214 44.7219 50 1.01 17
IV.MC2.EHZ. 2021-03-06T13:56:52.29 0.3 undecidable manual P 39 48.5181 50 -0.08 70
IV.CESI.HHZ. 2021-03-06T13:56:52.22 0.1 undecidable manual P 9 48.618 50 -0.16 92
IV.FIAM.HNN. 2021-03-06T13:56:51.33 0.3 undecidable manual P 143 41.8248 50 -0.01 72
IV.CESX.HHZ. 2021-03-06T13:56:51.07 0.3 undecidable manual S 283 18.9699 116 0.52 67
IV.SMA1.EHZ. 2021-03-06T13:56:51.56 0.1 undecidable manual P 81 43.1235 50 0.03 95
IV.NRCA.HHZ. 2021-03-06T13:56:50.40 0.3 undecidable manual P 40 38.0286 50 -0.34 67
IV.T1299.HNN. 2021-03-06T13:56:50.77 0.1 undecidable manual P 80 38.8278 50 -0.11 94
IV.LNSS.HHZ. 2021-03-06T13:56:50.67 0.3 undecidable manual S 79 18.87 116 0.17 72
IV.GAVE.EHZ. 2021-03-06T13:56:49.59 0.3 undecidable manual S 26 14.874 122 0.28 71
IV.MOMA.HHZ. 2021-03-06T13:56:49.74 0.3 undecidable manual P 322 32.5452 50 -0.16 71
IV.RM33.EHZ. 2021-03-06T13:56:49.89 0.3 undecidable manual P 102 33.4443 50 -0.16 71
IV.LNSS.HHZ. 2021-03-06T13:56:47.48 0.1 undecidable manual P 79 18.87 116 0.05 99
IV.CESX.HHZ. 2021-03-06T13:56:47.72 0.3 undecidable manual P 283 18.9699 116 0.27 71
IV.ARRO.EHZ. 2021-03-06T13:56:46.15 0.3 undecidable manual S 282 3.996 156 -0.56 67
IV.GAVE.EHZ. 2021-03-06T13:56:46.70 0.1 undecidable manual P 26 14.874 122 -0.04 100
IV.ARRO.EHZ. 2021-03-06T13:56:45.12 0.1 undecidable manual P 282 3.996 156 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.8 0.0005535000000000001 1.84 AML other m 2021-03-06T13:56:50.93
IV.GAVE.EHN. ML:1.8 0.0005525 0.2 AML other m 2021-03-06T13:56:50.90
IV.LNSS.HHE. ML:2.2 0.00115 0.56 AML other m 2021-03-06T13:56:51.31
IV.LNSS.HHN. ML:2.0 0.000775 0.98 AML other m 2021-03-06T13:56:51.20
IV.CESX.HHN. ML:1.3 0.0001725 1.22 AML other m 2021-03-06T13:56:53.24
IV.MOMA.HHN. ML:1.4 0.00011830000000000002 0.76 AML other m 2021-03-06T13:56:55.01
IV.MOMA.HHE. ML:1.4 0.00009945 0.86 AML other m 2021-03-06T13:56:55.02
IV.CESX.HHE. ML:1.4 0.0001815 0.48 AML other m 2021-03-06T13:56:56.32
IV.NRCA.HHE. ML:1.7 0.00017649999999999998 0.16 AML other m 2021-03-06T13:56:56.84
IV.NRCA.HHN. ML:1.4 0.00008374999999999999 0.38 AML other m 2021-03-06T13:56:59.62
IV.SMA1.EHN. ML:1.5 0.0001061 0.48 AML other m 2021-03-06T13:57:01.93
IV.SMA1.EHE. ML:1.5 0.0001075 1.3 AML other m 2021-03-06T13:57:03.89
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