Earthquake with magnitude of ML 1.2 on date 06-09-2021 and time 16:45:40 (UTC) in region Polino (TR)

A magnitude ML 1.2 earthquake occured in region: Polino (TR), on

  • 06-09-2021 16:45:40 (UTC)
  • 06-09-2021 18:45:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.581, 12.845 at 7 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.

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 1 233 233
Arrone TR 6 2763 2996
Morro Reatino RI 6 373 3369
Ferentillo TR 6 1913 5282
Montefranco TR 7 1276 6558
Labro RI 7 374 6932
Rivodutri RI 7 1253 8185
Poggio Bustone RI 9 2055 10240
Leonessa RI 10 2435 12675
Colli sul Velino RI 11 533 13208
Monteleone di Spoleto PG 12 599 13807
Cantalice RI 13 2755 16562
Scheggino PG 15 461 17023
Greccio RI 15 1558 18581
Terni TR 16 111501 130082
Poggiodomo PG 16 117 130199
Sant'Anatolia di Narco PG 17 564 130763
Stroncone TR 17 4917 135680
Spoleto PG 19 38218 173898
Rieti RI 20 47698 221596
Contigliano RI 20 3783 225379

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km E of Terni (111501 inhabitants)
43 Km S of Foligno (57155 inhabitants)
52 Km W of L'Aquila (69753 inhabitants)
63 Km E of Viterbo (67173 inhabitants)
65 Km N of Guidonia Montecelio (88673 inhabitants)
69 Km N of Tivoli (56533 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
71 Km W of Teramo (54892 inhabitants)
82 Km NE of Roma (2864731 inhabitants)
100 Km N of Velletri (53303 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2021-09-06
16:45:40
42.5813 12.8447 7 2021-09-06
17:02:31
Sala Sismica INGV-Roma 95120011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-06 16:45:40 ± 0.18
Latitude 42.5813 ± 0.0090
Longitude 12.8447 ± 0.0085
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95120011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 892
Semi-minor axis of confidence ellipse (meter) 623
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 200
Circular confidence region, given by single value of horizontal uncertainty (meter) 890
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 163
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.57467
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 95120011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-06 17:02:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.BURY.HHZ. 2021-09-06T16:47:32.36 3.0 undecidable manual Sn 7.47 0
IV.MBAL.EHZ. 2021-09-06T16:47:25.63 3.0 undecidable manual Sg 14.95 0
IV.ZEN8.EHZ. 2021-09-06T16:47:22.10 3.0 undecidable manual Sg 11.81 0
IV.QLNO.HHZ. 2021-09-06T16:47:18.83 3.0 undecidable manual Sn 2.08 0
GU.CANO.HHZ. 2021-09-06T16:47:17.79 3.0 undecidable manual Sn 0.57 0
IV.CADC.EHZ. 2021-09-06T16:47:10.98 3.0 undecidable manual Sn -0.68 0
IV.GIB.HHZ. 2021-09-06T16:47:02.63 3.0 positive manual Pg 14.85 0
IV.EPZF.HHZ. 2021-09-06T16:47:01.48 3.0 undecidable manual Pg 9.17 0
IV.SBPO.HNZ. 2021-09-06T16:46:54.84 3.0 undecidable manual Sn -1.25 0
GU.MGRO.HHZ. 2021-09-06T16:46:54.93 3.0 undecidable manual Pg 17.9 0
IV.ILOS.HHZ. 2021-09-06T16:46:51.88 3.0 positive manual Pg 7.25 0
IV.MFNL.HHZ. 2021-09-06T16:46:47.31 3.0 negative manual Pn -1.82 0
IV.ZEN8.EHZ. 2021-09-06T16:46:32.37 3.0 undecidable manual Pn 2.28 0
IX.SCL3.EHZ.02 2021-09-06T16:46:30.97 3.0 positive manual Pg 9.09 0
IV.RIBO.EHZ.01 2021-09-06T16:46:20.71 3.0 undecidable manual Sn 1.24 0
IV.PESA.HHZ. 2021-09-06T16:46:19.51 3.0 undecidable manual S -1.39 0
IV.CSP1.EHZ. 2021-09-06T16:46:01.15 0.3 undecidable manual S 27 0.5747 50 0.52 62
IV.LPEL.HHZ. 2021-09-06T16:46:00.25 3.0 undecidable manual P 0.43 0
IV.FDMO.HHZ. 2021-09-06T16:45:57.83 3.0 undecidable manual S -0.3 0
IV.ARVD.HHZ. 2021-09-06T16:45:57.45 3.0 positive manual P 1.07 0
IV.TOLF.HHZ. 2021-09-06T16:45:53.47 3.0 undecidable manual P -0.26 0
IV.CSP1.EHZ. 2021-09-06T16:45:51.53 0.1 undecidable manual P 27 0.5747 50 -0.47 84
IV.RM33.EHZ. 2021-09-06T16:45:51.28 0.3 undecidable manual S 105 0.2815 102 -0.06 73
IV.RM33.EHZ. 2021-09-06T16:45:46.41 0.1 undecidable manual P 105 0.2815 102 -0.23 94
IV.NRCA.HHZ. 2021-09-06T16:45:46.97 3.0 positive manual P 0.15 0
IV.SRES.HHZ. 2021-09-06T16:45:46.38 3.0 undecidable manual P -0.57 0
IV.LNSS.HHZ. 2021-09-06T16:45:46.54 0.3 undecidable manual S 81 0.1457 113 0.22 72
IV.GAVE.EHZ. 2021-09-06T16:45:45.07 0.3 undecidable manual S 18 0.1169 118 -0.25 72
IV.GAVE.EHZ. 2021-09-06T16:45:43.19 0.6 undecidable manual P 18 0.1169 118 0.03 50
IV.LNSS.HHZ. 2021-09-06T16:45:43.94 0.1 undecidable manual P 81 0.1457 113 0.19 97
IV.ARRO.EHZ. 2021-09-06T16:45:43.55 0.3 undecidable manual S 268 0.0585 137 0.04 76
IV.ARRO.EHZ. 2021-09-06T16:45:42.24 0.1 undecidable manual P 268 0.0585 137 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:0 0.000622 0.3 AML other m 2021-09-06T16:45:43.69
IV.ARRO.EHE. ML:0 0.0005245 0.24 AML other m 2021-09-06T16:45:43.93
IV.GAVE.EHN. ML:1.2 0.0002165 0.6 AML other m 2021-09-06T16:45:45.82
IV.GAVE.EHE. ML:1.3 0.0002395 0.48 AML other m 2021-09-06T16:45:46.09
IV.LNSS.HHN. ML:1.4 0.000277 0.46 AML other m 2021-09-06T16:45:47.15
IV.LNSS.HHE. ML:1.4 0.000256 1.32 AML other m 2021-09-06T16:45:47.85
IV.RM33.EHE. ML:0.9 4.065E-5 0.62 AML other m 2021-09-06T16:45:52.64
IV.RM33.EHN. ML:0.9 4.205E-5 0.88 AML other m 2021-09-06T16:45:54.43
IV.FDMO.HHE. ML:0.9 2.175E-5 0.76 AML other m 2021-09-06T16:46:01.72
IV.FDMO.HHN. ML:0.9 1.87E-5 0.42 AML other m 2021-09-06T16:46:02.86
IV.NRCA.HHE. ML:1.4 8.915E-5 0.06 AML other m 2021-09-06T16:46:07.84
IV.NRCA.HHN. ML:1.2 6.895E-5 0.06 AML other m 2021-09-06T16:46:07.83
IV.SBPO.HNN. ML:3.8 0.00069 0.82 AML other m 2021-09-06T16:46:55.42
IV.SBPO.HNE. ML:4.4 0.00285 0.06 AML other m 2021-09-06T16:46:56.66
IV.ZEN8.EHN. ML:3 6.12E-5 0.36 AML other m 2021-09-06T16:47:24.84
IV.ZEN8.EHE. ML:2.8 3.885E-5 1.38 AML other m 2021-09-06T16:47:25.07
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