Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 17-06-2021 and time 18:51:22 (Italy) in region 5 km E Terni (TR)

A magnitude ML 1.9 earthquake occured in region: 5 km E Terni (TR), on

  • 17-06-2021 16:51:22 (UTC)
  • 17-06-2021 18:51:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5530, 12.7020 at 8 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Terni TR 5 111501 111501
Arrone TR 7 2763 114264
Stroncone TR 7 4917 119181
Montefranco TR 7 1276 120457
Labro RI 9 374 120831
Colli sul Velino RI 9 533 121364
Ferentillo TR 11 1913 123277
Morro Reatino RI 11 373 123650
Polino TR 12 233 123883
Greccio RI 12 1558 125441
Rivodutri RI 13 1253 126694
San Gemini TR 14 5018 131712
Configni RI 15 633 132345
Narni TR 16 19785 152130
Poggio Bustone RI 16 2055 154185
Cottanello RI 16 563 154748
Contigliano RI 17 3783 158531
Montasola RI 19 395 158926
Cantalice RI 19 2755 161681
Vacone RI 19 256 161937
Acquasparta TR 20 4778 166715

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km E of Terni (111501 inhabitants)
45 Km S of Foligno (57155 inhabitants)
51 Km E of Viterbo (67173 inhabitants)
61 Km W of L'Aquila (69753 inhabitants)
61 Km N of Guidonia Montecelio (88673 inhabitants)
66 Km N of Tivoli (56533 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
76 Km N of Roma (2864731 inhabitants)
83 Km W of Teramo (54892 inhabitants)
91 Km NE of Civitavecchia (52991 inhabitants)
95 Km NE of Fiumicino (78395 inhabitants)
97 Km N of Velletri (53303 inhabitants)
99 Km N of Pomezia (62966 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 1.9 2021-06-17
16:51:22		 42.553 12.702 8 2021-12-29
11:12:07		 Bollettino Sismico Italiano INGV 91865611
Reviewed
Rev100 		ML 1.9 2021-06-17
16:51:22		 42.5483 12.7002 8 2021-06-17
17:05:31		 Sala Sismica INGV-Roma 91462371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-17 16:51:22 ± 0.09
Latitude 42.5530 ± 0.0054
Longitude 12.7020 ± 0.0061
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91865611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 561
Semi-minor axis of confidence ellipse (meter) 418
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.82917
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 91865611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-26 13:11:31

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 91462371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-17 17:05:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PESA.HHZ. 2021-06-17T16:52:06.74 3.0 undecidable manual S 0.01 0
IV.RIBO.EHZ.01 2021-06-17T16:52:02.28 3.0 undecidable manual S -1.92 0
IV.EL6.EHZ. 2021-06-17T16:51:51.37 0.6 undecidable manual S 21 92.0412 50 1.33 27
IV.CSP1.EHZ. 2021-06-17T16:51:45.40 0.6 undecidable manual S 34 72.4719 50 0.59 40
IV.FDMO.HHZ. 2021-06-17T16:51:42.28 0.6 undecidable manual S 30 62.0934 50 0.22 45
IV.ASSB.HHZ. 2021-06-17T16:51:40.15 0.6 undecidable manual S 356 54.4011 50 0.15 46
IV.MC2.EHZ. 2021-06-17T16:51:40.73 0.6 undecidable manual S 45 56.1993 50 0.26 45
IV.EL6.EHZ. 2021-06-17T16:51:38.65 0.3 undecidable manual P 21 92.0412 50 0.31 63
IV.RM33.EHZ. 2021-06-17T16:51:36.39 0.6 undecidable manual S 96 42.2244 50 -0.34 45
IV.CSP1.EHZ. 2021-06-17T16:51:35.48 0.3 undecidable manual P 34 72.4719 50 0.16 67
IV.CERT.HHZ. 2021-06-17T16:51:34.83 0.3 undecidable manual P 161 70.8735 50 -0.25 66
IV.BARO.HNZ. 2021-06-17T16:51:34.24 0.3 undecidable manual P 238 63.1923 50 0.35 66
IV.FDMO.HHZ. 2021-06-17T16:51:33.50 0.1 undecidable manual P 30 62.0934 50 -0.23 90
IV.ASSB.HHZ. 2021-06-17T16:51:32.37 0.1 undecidable manual P 356 54.4011 50 -0.18 92
IV.LNSS.HHZ. 2021-06-17T16:51:32.44 0.6 undecidable manual S 79 28.1496 106 -0.1 49
IV.MC2.EHZ. 2021-06-17T16:51:32.67 0.1 undecidable manual P 45 56.1993 50 -0.14 92
IT.GNU.HGE. 2021-06-17T16:51:32.81 0.6 undecidable manual S 339 29.8479 105 -0.28 47
IV.MOMA.HHZ. 2021-06-17T16:51:32.86 0.6 undecidable manual S 339 29.8479 105 -0.23 48
IV.CESI.HHZ. 2021-06-17T16:51:31.96 0.3 undecidable manual P 18 52.8027 50 -0.33 67
IV.FIAM.HNE. 2021-06-17T16:51:31.45 0.6 undecidable manual P 133 46.4202 50 0.13 47
IV.SRES.HHE. 2021-06-17T16:51:30.55 0.3 undecidable manual P 204 38.4282 50 0.47 67
IV.RM33.EHZ. 2021-06-17T16:51:30.27 0.1 undecidable manual P 96 42.2244 50 -0.39 90
IV.GAVE.EHZ. 2021-06-17T16:51:30.82 0.6 undecidable manual S 45 22.0668 110 0.31 47
IV.NRCA.HHZ. 2021-06-17T16:51:30.77 0.1 undecidable manual P 47 45.8208 50 -0.45 88
IV.LNSS.HHZ. 2021-06-17T16:51:28.15 0.1 undecidable manual P 79 28.1496 106 -0.09 98
IT.GNU.HGE. 2021-06-17T16:51:28.35 0.3 undecidable manual P 339 29.8479 105 -0.2 72
IV.MOMA.HHZ. 2021-06-17T16:51:28.26 0.1 undecidable manual P 339 29.8479 105 -0.3 94
IV.GAVE.EHZ. 2021-06-17T16:51:27.14 0.1 undecidable manual P 45 22.0668 110 0.08 100
IV.CESX.HHZ. 2021-06-17T16:51:27.17 0.3 undecidable manual S 303 11.2776 126 -0.01 77
IV.ARRO.EHZ. 2021-06-17T16:51:26.12 0.6 undecidable manual S 61 5.994 144 0.26 49
IV.CESX.HHZ. 2021-06-17T16:51:25.29 0.1 positive manual P 303 11.2776 126 0.15 100
IV.ARRO.EHZ. 2021-06-17T16:51:24.69 0.1 positive manual P 61 5.994 144 0.31 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:2.3 0.003615 0.16 AML other m 2021-06-17T16:51:26.59
IV.ARRO.EHE. ML:2.2 0.0030099999999999997 0.86 AML other m 2021-06-17T16:51:26.69
IV.CESX.HHN. ML:1.7 0.0006039999999999999 0.46 AML other m 2021-06-17T16:51:27.65
IV.CESX.HHE. ML:1.7 0.0006385000000000001 0.6 AML other m 2021-06-17T16:51:29.35
IV.LNSS.HNE. ML:2.0 0.0006255 0.62 AML other m 2021-06-17T16:51:32.86
IV.LNSS.HHE. ML:2.0 0.0006314999999999999 0.62 AML other m 2021-06-17T16:51:32.55
IV.GAVE.EHE. ML:1.8 0.0004295 0.34 AML other m 2021-06-17T16:51:32.74
IV.GAVE.EHN. ML:1.9 0.0005005 0.3 AML other m 2021-06-17T16:51:33.06
IV.LNSS.HHN. ML:2.2 0.000935 0.18 AML other m 2021-06-17T16:51:33.26
IV.LNSS.HNN. ML:2.2 0.0008280000000000001 0.18 AML other m 2021-06-17T16:51:33.36
IV.MOMA.HHN. ML:1.8 0.0003155 0.84 AML other m 2021-06-17T16:51:34.27
IV.MOMA.HHE. ML:1.9 0.0003815 0.56 AML other m 2021-06-17T16:51:34.88
IV.RM33.EHE. ML:1.8 0.00021300000000000003 0.22 AML other m 2021-06-17T16:51:38.57
IV.NRCA.HHN. ML:1.8 0.0001905 0.12 AML other m 2021-06-17T16:51:39.39
IV.NRCA.HHE. ML:1.8 0.0002115 0.48 AML other m 2021-06-17T16:51:39.46
IV.RM33.EHN. ML:1.7 0.00016649999999999998 0.28 AML other m 2021-06-17T16:51:39.44
IV.CESI.HHE. ML:1.8 0.0001635 1 AML other m 2021-06-17T16:51:40.94
IV.CESI.HHN. ML:2.1 0.000316 0.22 AML other m 2021-06-17T16:51:40.98
IV.ASSB.HHE. ML:1.6 0.0000997 0.18 AML other m 2021-06-17T16:51:42.12
IV.ASSB.HHN. ML:1.6 0.00008995 0.2 AML other m 2021-06-17T16:51:43.43
IV.FDMO.HHN. ML:2.0 0.000193 0.18 AML other m 2021-06-17T16:51:43.43
IV.FDMO.HHE. ML:2.0 0.0002205 0.22 AML other m 2021-06-17T16:51:43.49
IV.CSP1.EHE. ML:2.0 0.0001635 0.68 AML other m 2021-06-17T16:51:46.45
IV.CSP1.EHN. ML:1.9 0.000141 1.68 AML other m 2021-06-17T16:51:47.12
IV.EL6.EHE. ML:2.0 0.0001064 1.1 AML other m 2021-06-17T16:51:52.22
IV.EL6.EHN. ML:1.9 0.00009120000000000001 1.26 AML other m 2021-06-17T16:51:52.88
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