Earthquake with magnitude of ML 1.8 on date 16-09-2021 and time 10:10:15 (UTC) in region 1 km E Polino (TR)

A magnitude ML 1.8 earthquake occured in region: 1 km E Polino (TR), on

  • 16-09-2021 10:10:15 (UTC)
  • 16-09-2021 12:10:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.588, 12.861 at 16 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
Ferentillo TR 7 1913 2146
Morro Reatino RI 7 373 2519
Arrone TR 7 2763 5282
Montefranco TR 8 1276 6558
Rivodutri RI 8 1253 7811
Labro RI 8 374 8185
Leonessa RI 9 2435 10620
Poggio Bustone RI 10 2055 12675
Monteleone di Spoleto PG 10 599 13274
Colli sul Velino RI 12 533 13807
Cantalice RI 14 2755 16562
Scheggino PG 14 461 17023
Poggiodomo PG 15 117 17140
Sant'Anatolia di Narco PG 16 564 17704
Greccio RI 17 1558 19262
Terni TR 18 111501 130763
Stroncone TR 19 4917 135680
Cascia PG 19 3217 138897
Spoleto PG 19 38218 177115

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Terni (111501 inhabitants)
43 Km SE of Foligno (57155 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
65 Km E of Viterbo (67173 inhabitants)
66 Km N of Guidonia Montecelio (88673 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
70 Km W of Teramo (54892 inhabitants)
70 Km N of Tivoli (56533 inhabitants)
83 Km NE of Roma (2864731 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 1.8 2021-09-16
10:10:15
42.5883 12.861 16 2021-09-16
10:17:11
Sala Sismica INGV-Roma 95503571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-16 10:10:15 ± 0.07
Latitude 42.5883 ± 0.0036
Longitude 12.8610 ± 0.0037
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95503571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 359
Semi-minor axis of confidence ellipse (meter) 60
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 18
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.61783
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 19
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 95503571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-16 10:17:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PIPA.HHZ. 2021-09-16T10:12:09.06 3.0 undecidable manual Sn -7.33 0
IV.TDS.HHZ. 2021-09-16T10:11:58.19 3.0 undecidable manual Sn -9.04 0
IV.PZUN.HHZ. 2021-09-16T10:11:46.99 3.0 undecidable manual Sg 4.11 0
IX.SCL3.EHZ.02 2021-09-16T10:11:40.68 3.0 undecidable manual Sg 2.57 0
IV.NDIM.HNZ. 2021-09-16T10:11:30.95 3.0 undecidable manual Sn -3.35 0
IV.ZEN8.EHZ. 2021-09-16T10:11:13.82 3.0 undecidable manual Pg 4.01 0
ST.VARA.EHZ. 2021-09-16T10:11:10.36 3.0 undecidable manual Pn -1.06 0
IV.CADC.EHZ. 2021-09-16T10:11:05.99 3.0 undecidable manual Pn -4.79 0
IV.ZCCA.HHZ. 2021-09-16T10:10:56.71 3.0 positive manual Pg 2.98 0
IV.CELB.HHZ. 2021-09-16T10:10:48.98 3.0 undecidable manual Pn -1.74 0
IV.BRSN.HNZ. 2021-09-16T10:10:45.59 3.0 positive manual Pn -1.88 0
IV.CSP1.EHZ. 2021-09-16T10:10:34.70 0.6 undecidable manual S 26 0.563 95 0.31 43
IV.MML1.EHZ. 2021-09-16T10:10:33.95 0.6 undecidable manual S 9 0.5306 95 0.5 41
IV.FDMO.HHZ. 2021-09-16T10:10:31.88 0.6 undecidable manual S 20 0.4775 96 0 47
IV.CESI.HHZ. 2021-09-16T10:10:30.10 0.6 undecidable manual S 4 0.4173 97 -0.01 47
IV.MTRA.EHZ. 2021-09-16T10:10:30.22 0.6 undecidable manual S 67 0.4281 97 -0.2 45
IV.MC2.EHZ. 2021-09-16T10:10:29.64 0.6 undecidable manual S 37 0.4029 98 -0.04 47
IV.MGAB.HHZ. 2021-09-16T10:10:28.29 3.0 undecidable manual P -1.39 0
IV.SMA1.EHZ. 2021-09-16T10:10:28.73 0.6 undecidable manual S 83 0.3516 100 0.56 42
IV.ATCC.EHZ. 2021-09-16T10:10:27.37 0.6 undecidable manual P 345 0.6178 95 0.15 44
IV.MF5.EHZ. 2021-09-16T10:10:27.35 1.0 positive manual P 48 0.5936 95 0.55 20
IV.MOMA.HHZ. 2021-09-16T10:10:26.90 0.6 undecidable manual S 315 0.3031 102 0.12 47
IT.GNU.HGZ. 2021-09-16T10:10:26.88 0.6 undecidable manual S 315 0.3031 102 0.11 47
IV.MTCE.HHE. 2021-09-16T10:10:26.33 0.1 undecidable manual P 189 0.572 95 -0.11 89
IV.CSP1.EHZ. 2021-09-16T10:10:26.09 0.6 positive manual P 26 0.563 95 -0.19 44
IV.RM33.EHZ. 2021-09-16T10:10:26.15 0.6 undecidable manual S 107 0.2725 104 0.28 46
IV.NRCA.HHZ. 2021-09-16T10:10:26.46 0.6 undecidable manual S 37 0.3076 102 -0.44 44
IV.MML1.EHZ. 2021-09-16T10:10:25.48 1.0 negative manual P 9 0.5306 95 -0.26 22
IV.TERO.HHZ. 2021-09-16T10:10:25.83 3.0 negative manual P -2.69 0
IV.CESX.HHZ. 2021-09-16T10:10:24.05 0.1 undecidable manual S 276 0.2023 111 0.14 95
IV.FDMO.HHZ. 2021-09-16T10:10:24.55 0.1 positive manual P 20 0.4775 96 -0.28 88
IV.FIAM.HHZ. 2021-09-16T10:10:23.18 3.0 negative manual P -2.82 0
IV.MTRA.EHZ. 2021-09-16T10:10:23.89 0.6 positive manual P 67 0.4281 97 -0.1 46
IV.MC2.EHZ. 2021-09-16T10:10:23.53 1.0 negative manual P 37 0.4029 98 -0.03 24
IV.CESI.HHZ. 2021-09-16T10:10:23.71 0.3 undecidable manual P 4 0.4173 97 -0.1 69
IT.GNU.HGZ. 2021-09-16T10:10:22.01 0.1 undecidable manual P 315 0.3031 102 0.13 94
IV.SMA1.EHZ. 2021-09-16T10:10:22.95 0.3 positive manual P 83 0.3516 100 0.26 68
IT.MMP1.HGE. 2021-09-16T10:10:22.39 0.1 undecidable manual P 194 0.3489 100 -0.26 91
IV.RM33.EHZ. 2021-09-16T10:10:21.41 0.3 undecidable manual P 107 0.2725 104 0.05 72
IV.LNSS.HHZ. 2021-09-16T10:10:21.88 0.6 undecidable manual S 84 0.1331 126 -0.2 48
IV.NRCA.HHZ. 2021-09-16T10:10:21.72 0.1 negative manual P 37 0.3076 102 -0.24 92
IV.MOMA.HHZ. 2021-09-16T10:10:21.89 1.0 positive manual P 315 0.3031 102 0 24
IV.GAVE.HNZ. 2021-09-16T10:10:21.15 0.6 undecidable manual S 13 0.107 134 -0.34 47
IV.ARRO.EHZ. 2021-09-16T10:10:20.89 0.6 undecidable manual S 263 0.071 147 0.07 50
IV.CESX.HHZ. 2021-09-16T10:10:20.15 0.1 undecidable manual P 276 0.2023 111 -0.08 97
IV.LNSS.HHZ. 2021-09-16T10:10:19.25 0.1 negative manual P 84 0.1331 126 0.07 98
IV.ARRO.EHZ. 2021-09-16T10:10:18.58 0.1 negative manual P 263 0.071 147 0.13 98
IV.GAVE.HNZ. 2021-09-16T10:10:18.82 0.1 negative manual P 13 0.107 134 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:1.9 0.0008305 0.68 AML other m 2021-09-16T10:10:21.36
IV.ARRO.EHN. ML:1.7 0.0005365 1.38 AML other m 2021-09-16T10:10:21.05
IV.LNSS.HHE. ML:2.1 0.00106 0.56 AML other m 2021-09-16T10:10:22.42
IV.LNSS.HHN. ML:2.1 0.0008975 0.58 AML other m 2021-09-16T10:10:22.90
IV.CESX.HHE. ML:1.5 0.000182 0.16 AML other m 2021-09-16T10:10:24.13
IV.CESX.HHN. ML:1.6 0.00023 1.04 AML other m 2021-09-16T10:10:24.98
IV.RM33.EHE. ML:1.9 0.0003815 1.22 AML other m 2021-09-16T10:10:26.89
IV.MOMA.HHN. ML:1.9 0.0003305 1.14 AML other m 2021-09-16T10:10:26.93
IV.MOMA.HNN. ML:1.9 0.000344 1.12 AML other m 2021-09-16T10:10:26.93
IV.NRCA.HHN. ML:2.1 0.000534 0.28 AML other m 2021-09-16T10:10:27.11
IV.MOMA.HHE. ML:2.1 0.000573 0.14 AML other m 2021-09-16T10:10:27.33
IV.MOMA.HNE. ML:2.1 0.000535 0.88 AML other m 2021-09-16T10:10:27.33
IV.RM33.EHN. ML:1.7 0.00023 1.62 AML other m 2021-09-16T10:10:28.03
IV.NRCA.HHE. ML:2.1 0.000521 0.94 AML other m 2021-09-16T10:10:28.66
IV.SMA1.EHE. ML:2.2 0.0004905 0.42 AML other m 2021-09-16T10:10:29.38
IV.SMA1.EHN. ML:1.9 0.0002555 0.98 AML other m 2021-09-16T10:10:29.77
IV.FIAM.HHN. ML:1.4 7.995E-5 0.4 AML other m 2021-09-16T10:10:29.44
IV.FIAM.HHE. ML:1.2 5.14E-5 1.5 AML other m 2021-09-16T10:10:30.95
IV.MTRA.EHN. ML:1.9 0.000199 0.24 AML other m 2021-09-16T10:10:30.85
IV.CESI.HHE. ML:1.4 6.785E-5 0.8 AML other m 2021-09-16T10:10:32.41
IV.MTRA.EHE. ML:1.7 0.0001395 0.5 AML other m 2021-09-16T10:10:32.08
IV.FDMO.HHE. ML:1.7 0.000128 0.84 AML other m 2021-09-16T10:10:32.77
IV.FDMO.HHN. ML:1.6 9.745E-5 0.16 AML other m 2021-09-16T10:10:32.60
IV.CESI.HHN. ML:1.5 8.945E-5 0.52 AML other m 2021-09-16T10:10:32.60
IV.MML1.EHE. ML:1.5 6.355E-5 0.44 AML other m 2021-09-16T10:10:34.66
IV.MML1.EHN. ML:1.5 7.045E-5 0.24 AML other m 2021-09-16T10:10:34.70
IV.CSP1.EHE. ML:2 0.000176 0.38 AML other m 2021-09-16T10:10:37.31
IV.CSP1.EHN. ML:2 0.0001875 0.66 AML other m 2021-09-16T10:10:37.07
IV.MGAB.HHN. ML:1.8 9.07E-5 0.5 AML other m 2021-09-16T10:10:38.67
IV.MGAB.HHE. ML:1.6 6.75E-5 0.44 AML other m 2021-09-16T10:10:38.47
IV.ATCC.EHE. ML:1.6 6.43E-5 0.24 AML other m 2021-09-16T10:10:39.59
IV.ATCC.EHN. ML:1.5 4.885E-5 0.48 AML other m 2021-09-16T10:10:50.13
IV.CELB.HHE. ML:2.9 0.000205 0.06 AML other m 2021-09-16T10:11:00.31
IV.CELB.HHN. ML:3 0.0002315 0.08 AML other m 2021-09-16T10:11:00.37
IX.SCL3.EHN.02 ML:3.8 0.000835 0.48 AML other m 2021-09-16T10:11:42.52
IX.SCL3.EHE.02 ML:3.6 0.0005315 0.64 AML other m 2021-09-16T10:11:43.48
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