Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 08-02-2021 and time 13:06:13 (UTC) in region 3 km NE Polino (TR)

A magnitude ML 1.3 earthquake occured in region: 3 km NE Polino (TR), on

  • 08-02-2021 13:06:13 (UTC)
  • 08-02-2021 14:06:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6060, 12.8700 at 11 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
Ferentillo TR 7 1913 2146
Montefranco TR 8 1276 3422
Monteleone di Spoleto PG 9 599 4021
Arrone TR 9 2763 6784
Leonessa RI 9 2435 9219
Morro Reatino RI 9 373 9592
Rivodutri RI 10 1253 10845
Labro RI 10 374 11219
Poggio Bustone RI 12 2055 13274
Scheggino PG 12 461 13735
Poggiodomo PG 13 117 13852
Colli sul Velino RI 14 533 14385
Sant'Anatolia di Narco PG 15 564 14949
Cantalice RI 15 2755 17704
Cascia PG 17 3217 20921
Spoleto PG 18 38218 59139
Vallo di Nera PG 18 364 59503
Greccio RI 19 1558 61061
Terni TR 19 111501 172562

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km E of Terni (111501 inhabitants)
41 Km SE of Foligno (57155 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
66 Km E of Viterbo (67173 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
68 Km N of Guidonia Montecelio (88673 inhabitants)
69 Km W of Teramo (54892 inhabitants)
72 Km N of Tivoli (56533 inhabitants)
85 Km NE of Roma (2864731 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 1.3 2021-02-08
13:06:13		 42.6058 12.8698 11 2021-07-12
16:54:58		 Bollettino Sismico Italiano INGV 86949071
Reviewed
Rev100 		ML 1.4 2021-02-08
13:06:13		 42.6068 12.8713 10 2021-02-08
13:27:44		 Sala Sismica INGV-Roma 86937991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-08 13:06:13 ± 0.07
Latitude 42.6058 ± 0.0045
Longitude 12.8698 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86949071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 497
Semi-minor axis of confidence ellipse (meter) 340
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 177
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.08094
Epicentral distance of station farthest from the epicenter (degree) 0.46315
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 86949071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-08 21:44:15

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 86937991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-08 13:27:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2021-02-08T13:06:30.06 0.6 undecidable manual S 341 51.4152 50 0.15 46
IV.CESI.HHE. 2021-02-08T13:06:28.31 0.3 undecidable manual S 4 44.3223 50 0.28 68
IV.MC2.EHZ. 2021-02-08T13:06:27.84 0.3 undecidable manual S 37 42.7239 50 0.25 69
IV.RM33.HNE. 2021-02-08T13:06:24.25 0.3 undecidable manual S 111 30.1476 50 0.01 74
IV.NRCA.HHZ. 2021-02-08T13:06:24.31 0.3 undecidable manual S 38 32.1456 50 -0.47 67
IV.MOMA.HNZ. 2021-02-08T13:06:24.90 0.3 undecidable manual S 312 32.8449 50 -0.06 72
IV.ASSB.HHZ. 2021-02-08T13:06:23.40 0.1 undecidable manual P 341 51.4152 50 0.34 88
IV.CESX.HHZ. 2021-02-08T13:06:22.05 0.3 undecidable manual S 271 23.1546 50 -0.31 70
IV.CESI.HHE. 2021-02-08T13:06:21.88 0.3 undecidable manual P 4 44.3223 50 -0.09 71
IV.MC2.EHZ. 2021-02-08T13:06:21.72 0.1 undecidable manual P 37 42.7239 50 0 96
IV.MOMA.HNZ. 2021-02-08T13:06:20.25 0.6 undecidable manual P 312 32.8449 50 0.05 48
IV.RM33.HNE. 2021-02-08T13:06:20.00 0.3 undecidable manual P 111 30.1476 50 0.22 71
IV.NRCA.HHZ. 2021-02-08T13:06:19.82 0.1 undecidable manual P 38 32.1456 50 -0.27 93
IV.LNSS.HHZ. 2021-02-08T13:06:19.63 0.3 undecidable manual S 91 13.875 128 -0.19 73
IV.GAVE.EHZ. 2021-02-08T13:06:18.55 0.3 undecidable manual S 12 9.7791 138 -0.21 73
IV.CESX.HHZ. 2021-02-08T13:06:18.58 0.1 undecidable manual P 271 23.1546 50 -0.12 97
IV.ARRO.EHZ. 2021-02-08T13:06:18.54 0.3 undecidable manual S 251 8.9799 140 -0.05 76
IV.LNSS.HHZ. 2021-02-08T13:06:17.33 0.1 positive manual P 91 13.875 128 0.1 99
IV.ARRO.EHZ. 2021-02-08T13:06:16.72 0.1 undecidable manual P 251 8.9799 140 0.2 98
IV.GAVE.EHZ. 2021-02-08T13:06:16.71 0.1 negative manual P 12 9.7791 138 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNE. ML:1.5 0.00036279994999999997 0.1408 AML other m 2021-02-08T13:06:18.65
IV.GAVE.HNN. ML:1.2 0.00018540624 0.2496 AML other m 2021-02-08T13:06:18.83
IV.GAVE.EHN. ML:1.6 0.0005855 0.28 AML other m 2021-02-08T13:06:18.84
IV.GAVE.EHE. ML:1.5 0.0004055 0.44 AML other m 2021-02-08T13:06:18.87
IV.ARRO.EHN. ML:1.4 0.00035450000000000005 0.12 AML other m 2021-02-08T13:06:18.93
IV.ARRO.EHE. ML:1.3 0.00027 1.18 AML other m 2021-02-08T13:06:19.70
IV.LNSS.HHE. ML:1.3 0.0001915 0.34 AML other m 2021-02-08T13:06:20.28
IV.LNSS.HHN. ML:1.2 0.00017649999999999998 0.78 AML other m 2021-02-08T13:06:20.46
IV.LNSS.HNE. ML:1.2 0.00016445981500000002 0.1216 AML other m 2021-02-08T13:06:20.22
IV.LNSS.HNN. ML:1.2 0.00017039092 0.192 AML other m 2021-02-08T13:06:20.89
IV.CESX.HHE. ML:0.6 0.000026341964 0.1792 AML other m 2021-02-08T13:06:23.39
IV.CESX.HHN. ML:0.9 0.000051272955 0.1792 AML other m 2021-02-08T13:06:23.56
IV.NRCA.HHN. ML:1.0 0.000051551214999999996 0.1152 AML other m 2021-02-08T13:06:25.09
IV.NRCA.HHE. ML:1.4 0.00010996895000000001 0.1216 AML other m 2021-02-08T13:06:24.78
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