Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 01-07-2021 and time 07:18:25 (UTC) in region 5 km E Ferentillo (TR)

A magnitude ML 1.8 earthquake occured in region: 5 km E Ferentillo (TR), on

  • 01-07-2021 07:18:25 (UTC)
  • 01-07-2021 09:18:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6300, 12.8490 at 14 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
Ferentillo TR 5 1913 1913
Polino TR 5 233 2146
Montefranco TR 8 1276 3422
Arrone TR 8 2763 6185
Monteleone di Spoleto PG 9 599 6784
Scheggino PG 9 461 7245
Morro Reatino RI 12 373 7618
Poggiodomo PG 12 117 7735
Sant'Anatolia di Narco PG 12 564 8299
Labro RI 12 374 8673
Leonessa RI 12 2435 11108
Rivodutri RI 13 1253 12361
Poggio Bustone RI 14 2055 14416
Spoleto PG 15 38218 52634
Colli sul Velino RI 16 533 53167
Vallo di Nera PG 16 364 53531
Cascia PG 17 3217 56748
Terni TR 18 111501 168249
Cantalice RI 18 2755 171004

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Terni (111501 inhabitants)
38 Km SE of Foligno (57155 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
65 Km SE of Perugia (166134 inhabitants)
65 Km E of Viterbo (67173 inhabitants)
70 Km W of Teramo (54892 inhabitants)
71 Km N of Guidonia Montecelio (88673 inhabitants)
74 Km N of Tivoli (56533 inhabitants)
87 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 1.8 2021-07-01
07:18:25		 42.6297 12.8493 14 2021-12-29
11:12:32		 Bollettino Sismico Italiano INGV 95745261
Reviewed
Rev100 		ML 1.7 2021-07-01
07:18:25		 42.6313 12.8392 15 2021-07-01
07:27:16		 Sala Sismica INGV-Roma 92094931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-01 07:18:25 ± 0.05
Latitude 42.6297 ± 0.0027
Longitude 12.8493 ± 0.0037
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95745261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 310
Semi-minor axis of confidence ellipse (meter) 20
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 84
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 40
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61064
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 33
Type of magnitude ML
Reference to an origin 95745261
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-22 15:08:12

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 20
Type of magnitude ML
Reference to an origin 92094931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-01 07:27:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HNZ. 2021-07-01T07:18:55.26 3.0 undecidable manual S -0.09 0
IV.MGAB.HHZ. 2021-07-01T07:18:46.69 0.3 undecidable manual S 298 67.7766 93 0.81 53
IV.ATCC.EHZ. 2021-07-01T07:18:45.41 0.3 undecidable manual S 345 63.8916 93 0.55 59
IV.TERO.HHZ. 2021-07-01T07:18:44.41 0.3 undecidable manual S 90 61.5939 93 0.17 66
IV.SRES.HHZ. 2021-07-01T07:18:42.20 0.6 undecidable manual S 213 51.7038 94 0.6 40
IV.MMO1.EHZ. 2021-07-01T07:18:41.19 0.3 undecidable manual S 52 49.0176 95 0.29 66
IV.ASSB.HHZ. 2021-07-01T07:18:40.85 0.3 undecidable manual S 341 48.3183 95 0.13 68
IV.FIAM.HHE. 2021-07-01T07:18:40.20 0.6 undecidable manual S 151 45.7209 95 0.18 46
IV.FDMO.HHZ. 2021-07-01T07:18:40.94 0.3 undecidable manual S 23 49.1175 95 0.02 69
IV.SMA1.EHZ. 2021-07-01T07:18:39.38 3.0 undecidable manual S 0.78 0
IT.MMP1.HGZ. 2021-07-01T07:18:39.44 0.3 undecidable manual S 191 43.0236 95 0.14 69
IT.MTCL.HGZ. 2021-07-01T07:18:39.11 0.3 undecidable manual S 17 42.2244 96 0.03 70
IV.CESI.HHE. 2021-07-01T07:18:38.91 0.3 undecidable manual S 6 41.8248 96 -0.08 70
IV.T1299.HNN. 2021-07-01T07:18:37.71 0.3 undecidable manual S 89 35.3424 97 0.45 66
IV.MGAB.HHZ. 2021-07-01T07:18:37.34 0.6 undecidable manual P 298 67.7766 93 0.15 44
IV.TERO.HHZ. 2021-07-01T07:18:36.17 0.3 undecidable manual P 90 61.5939 93 -0.08 67
IV.ATCC.EHZ. 2021-07-01T07:18:36.74 0.6 undecidable manual P 345 63.8916 93 0.14 44
IV.RM33.EHZ. 2021-07-01T07:18:36.66 0.3 undecidable manual S 114 32.745 98 0.1 71
IV.MOMA.HHZ. 2021-07-01T07:18:35.64 0.3 undecidable manual S 310 29.8479 100 -0.17 71
IT.GNU.HGE. 2021-07-01T07:18:35.58 0.6 undecidable manual S 310 29.8479 100 -0.23 47
IV.NRCA.HHZ. 2021-07-01T07:18:35.99 0.3 undecidable manual S 44 31.2465 99 -0.19 70
IV.FDMO.HHZ. 2021-07-01T07:18:34.04 0.1 undecidable manual P 23 49.1175 95 -0.29 88
IV.MMO1.EHZ. 2021-07-01T07:18:34.20 0.1 undecidable manual P 52 49.0176 95 -0.12 91
IV.SRES.HHZ. 2021-07-01T07:18:34.58 1.0 undecidable manual P 213 51.7038 94 -0.14 23
IV.FIAM.HHE. 2021-07-01T07:18:33.80 0.3 undecidable manual P 151 45.7209 95 -0.01 70
IV.CESX.HHZ. 2021-07-01T07:18:33.31 0.3 undecidable manual S 264 21.5673 107 -0.35 69
IT.MTCL.HGZ. 2021-07-01T07:18:33.21 1.0 undecidable manual P 17 42.2244 96 -0.05 23
IV.SMA1.EHZ. 2021-07-01T07:18:33.02 3.0 positive manual P 0.05 0
IV.ASSB.HHZ. 2021-07-01T07:18:33.96 0.3 undecidable manual P 341 48.3183 95 -0.25 67
IV.CESI.HHE. 2021-07-01T07:18:33.02 0.3 undecidable manual P 6 41.8248 96 -0.19 69
IT.MMP1.HGZ. 2021-07-01T07:18:33.36 0.6 undecidable manual P 191 43.0236 95 -0.03 47
IV.T1299.HNN. 2021-07-01T07:18:32.35 0.6 undecidable manual P 89 35.3424 97 0.14 47
IV.LNSS.HHZ. 2021-07-01T07:18:32.37 0.3 undecidable manual S 101 15.873 117 0.12 73
IV.NRCA.HHZ. 2021-07-01T07:18:31.39 0.1 undecidable manual P 44 31.2465 99 -0.2 93
IV.RM33.EHZ. 2021-07-01T07:18:31.69 0.1 undecidable manual P 114 32.745 98 -0.12 93
IV.MOMA.HHZ. 2021-07-01T07:18:31.12 0.1 undecidable manual P 310 29.8479 100 -0.26 92
IT.GNU.HGE. 2021-07-01T07:18:31.67 1.0 undecidable manual P 310 29.8479 100 0.29 23
IV.GAVE.HNZ. 2021-07-01T07:18:30.48 0.3 undecidable manual S 28 7.7811 143 -0.12 73
IV.ARRO.EHZ. 2021-07-01T07:18:30.59 0.3 undecidable manual S 231 8.88 139 -0.18 72
IV.LNSS.HHZ. 2021-07-01T07:18:29.38 0.1 negative manual P 101 15.873 117 0.06 98
IV.CESX.HHZ. 2021-07-01T07:18:29.88 0.1 undecidable manual P 264 21.5673 107 -0.25 93
IV.ARRO.EHZ. 2021-07-01T07:18:28.44 0.1 positive manual P 231 8.88 139 -0.03 99
IV.GAVE.HNZ. 2021-07-01T07:18:28.40 0.1 negative manual P 28 7.7811 143 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNE. ML:2.3 0.0022464905 0.1312 AML other m 2021-07-01T07:18:30.87
IV.GAVE.EHE. ML:2.3 0.00215326 0.1216 AML other m 2021-07-01T07:18:30.87
IV.ARRO.EHN. ML:1.8 0.00060638165 0.1792 AML other m 2021-07-01T07:18:31.21
IV.GAVE.HNN. ML:1.5 0.00033997185 0.1184 AML other m 2021-07-01T07:18:30.98
IV.GAVE.EHN. ML:2.0 0.001120731 0.24 AML other m 2021-07-01T07:18:30.88
IV.ARRO.EHE. ML:1.8 0.000607 0.18 AML other m 2021-07-01T07:18:31.52
IV.LNSS.HHN. ML:2.1 0.000901 1.7 AML other m 2021-07-01T07:18:32.09
IV.CESX.HHN. ML:1.7 0.0003375 0.26 AML other m 2021-07-01T07:18:33.50
IV.LNSS.HHE. ML:1.9 0.0006526260499999999 0.16 AML other m 2021-07-01T07:18:33.15
IV.CESX.HHE. ML:1.6 0.00022085789999999998 0.2432 AML other m 2021-07-01T07:18:34.42
IV.MOMA.HHE. ML:1.8 0.000256 0.2 AML other m 2021-07-01T07:18:36.12
IV.MOMA.HHN. ML:1.7 0.00025182555000000003 0.1792 AML other m 2021-07-01T07:18:36.27
IV.MOMA.HNN. ML:1.7 0.00023312357 0.24 AML other m 2021-07-01T07:18:36.45
IV.MOMA.HNE. ML:1.7 0.00022781325000000003 0.192 AML other m 2021-07-01T07:18:36.12
IV.RM33.EHN. ML:1.7 0.00021146609999999998 0.2208 AML other m 2021-07-01T07:18:37.41
IV.SMA1.EHE. ML:2.0 0.0003665329 0.3008 AML other m 2021-07-01T07:18:39.44
IV.SMA1.EHN. ML:1.7 0.000182 0.22 AML other m 2021-07-01T07:18:40.27
IV.RM33.EHE. ML:1.5 0.0001457148 0.1408 AML other m 2021-07-01T07:18:39.61
IV.ASSB.HHN. ML:1.6 0.00009267742 0.2016 AML other m 2021-07-01T07:18:41.24
IV.FDMO.HHN. ML:1.9 0.00020850000000000003 0.2 AML other m 2021-07-01T07:18:41.32
IV.FDMO.HHE. ML:1.8 0.0001698746 0.2208 AML other m 2021-07-01T07:18:41.27
IV.ASSB.HHE. ML:1.4 0.00007170799499999999 0.16 AML other m 2021-07-01T07:18:42.59
IV.ATCC.EHE. ML:0.0 0.000074159375 0.1408 AML other m 2021-07-01T07:18:46.98
IV.MGAB.HHN. ML:1.6 0.00007489999999999999 0.42 AML other m 2021-07-01T07:18:48.29
IV.ATCC.EHN. ML:0.0 0.00007090296 0.4608 AML other m 2021-07-01T07:18:46.66
IV.MGAB.HHE. ML:1.7 0.00008488091000000001 0.1984 AML other m 2021-07-01T07:18:47.60
IV.LNSS.HNE. ML:2.2 0.001149559 0.2112 AML other m 2021-07-01T07:18:32.58
IV.LNSS.HNN. ML:2.0 0.00079345155 0.16 AML other m 2021-07-01T07:18:33.09
IV.RM33.HNE. ML:1.5 0.0001257585 0.128 AML other m 2021-07-01T07:18:37.39
IV.RM33.HNN. ML:1.8 0.0002383134 0.2304 AML other m 2021-07-01T07:18:37.41
IV.TERO.HHN. ML:1.4 0.00005629070499999999 0.3616 AML other m 2021-07-01T07:18:46.36
IV.TERO.HHE. ML:1.8 0.000124265135 0.32 AML other m 2021-07-01T07:18:44.28
IV.MGAB.HNE. ML:1.6 0.00006387284 0.1696 AML other m 2021-07-01T07:18:47.69
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