Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 22-04-2023 and time 13:59:23 (UTC) in region 1 km NW Stroncone (TR)

A magnitude ML 1.7 earthquake occured in region: 1 km NW Stroncone (TR), on

  • 22-04-2023 13:59:23 (UTC)
  • 22-04-2023 15:59:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5100, 12.6530 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.

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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
Stroncone TR 2 4917 4917
Terni TR 6 111501 116418
Configni RI 10 633 117051
Colli sul Velino RI 11 533 117584
Narni TR 11 19785 137369
Greccio RI 11 1558 138927
Cottanello RI 12 563 139490
Labro RI 12 374 139864
Arrone TR 13 2763 142627
Montefranco TR 14 1276 143903
Vacone RI 14 256 144159
Calvi dell'Umbria TR 14 1856 146015
Montasola RI 14 395 146410
Contigliano RI 14 3783 150193
San Gemini TR 15 5018 155211
Morro Reatino RI 15 373 155584
Montebuono RI 17 883 156467
Rivodutri RI 17 1253 157720
Ferentillo TR 17 1913 159633
Otricoli TR 17 1869 161502
Torri in Sabina RI 17 1256 162758
Tarano RI 18 1444 164202
Polino TR 18 233 164435
Casperia RI 19 1246 165681
Poggio Bustone RI 19 2055 167736

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km S of Terni (111501 inhabitants)
46 Km E of Viterbo (67173 inhabitants)
50 Km S of Foligno (57155 inhabitants)
57 Km N of Guidonia Montecelio (88673 inhabitants)
62 Km N of Tivoli (56533 inhabitants)
64 Km W of L'Aquila (69753 inhabitants)
70 Km SE of Perugia (166134 inhabitants)
70 Km N of Roma (2864731 inhabitants)
85 Km NE of Civitavecchia (52991 inhabitants)
88 Km W of Teramo (54892 inhabitants)
89 Km NE of Fiumicino (78395 inhabitants)
92 Km N of Velletri (53303 inhabitants)
94 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 1.7 2023-04-22
13:59:23		 42.5102 12.6532 8 2024-03-01
17:18:09		 Bollettino Sismico Italiano INGV 117447271
Reviewed
Rev100 		ML 1.6 2023-04-22
13:59:23		 42.517 12.6463 10 2023-04-22
14:08:30		 Sala Sismica INGV-Roma 116613071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-22 13:59:23 ± 0.09
Latitude 42.5102 ± 0.0036
Longitude 12.6532 ± 0.0061
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117447271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 440
Semi-minor axis of confidence ellipse (meter) 403
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 156
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.88223
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 117447271
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-18 11:00:17

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 116613071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-22 14:08:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CADC.HNZ. 2023-04-22T14:01:11.59 3.0 undecidable manual Sg 10.5 0
CR.STON.BHZ. 2023-04-22T14:01:07.56 3.0 undecidable manual Sn 5.69 0
GU.CANO.HHZ. 2023-04-22T14:01:00.13 3.0 undecidable manual Sn -4.15 0
IV.SCIAC.HHZ. 2023-04-22T14:00:44.66 3.0 undecidable manual Pg 12.24 0
4P.IT02A.HHZ. 2023-04-22T14:00:38.88 3.0 undecidable manual Pg 9.32 0
IV.GRI.EHZ. 2023-04-22T14:00:29.08 3.0 undecidable manual Pn 1.11 0
MN.TRI.HHZ. 2023-04-22T14:00:27.45 3.0 negative manual Pg 13.03 0
IV.IMOL.HNZ. 2023-04-22T14:00:27.75 3.0 undecidable manual Sg 3.15 0
IV.MTMR.EHZ. 2023-04-22T14:00:22.09 3.0 undecidable manual Sn -2.76 0
IV.MGR.HHZ. 2023-04-22T14:00:20.32 3.0 undecidable manual Pg 12.07 0
GU.RORO.HHZ. 2023-04-22T14:00:14.82 3.0 undecidable manual Pn -4.92 0
IV.MPPT.EHZ. 2023-04-22T14:00:14.73 3.0 undecidable manual Sn -6.66 0
GU.GRAM.HHZ. 2023-04-22T14:00:08.22 3.0 undecidable manual Pg 1.37 0
IX.COL3.HHZ.02 2023-04-22T14:00:03.88 3.0 undecidable manual Pg 2.53 0
IV.VAGA.HHZ. 2023-04-22T13:59:47.48 3.0 positive manual Pg 1.26 0
IV.MML1.EHZ. 2023-04-22T13:59:46.05 0.6 undecidable manual S 21 71.7726 50 -0.01 50
IV.SENI.HNZ. 2023-04-22T13:59:45.89 3.0 undecidable manual Pn -0.58 0
IV.FDMO.HHZ. 2023-04-22T13:59:45.40 0.3 undecidable manual S 31 68.2761 50 0.28 71
IV.MGAB.HHZ. 2023-04-22T13:59:44.00 0.3 undecidable manual S 316 62.7927 50 0.35 71
IV.CESI.HHZ. 2023-04-22T13:59:42.81 0.6 undecidable manual S 20 58.5969 50 0.27 48
IV.ASSB.HHZ. 2023-04-22T13:59:42.79 0.6 undecidable manual S 0 59.0964 50 0.12 50
IV.NRCA.HHZ. 2023-04-22T13:59:41.05 0.6 undecidable manual S 46 52.0035 50 0.28 49
IV.EL6.EHZ. 2023-04-22T13:59:40.55 0.3 undecidable manual P 22 97.9242 50 -0.07 70
IV.RM33.EHZ. 2023-04-22T13:59:39.16 0.6 undecidable manual S 90 45.9207 50 0.01 52
IV.CSP1.EHZ. 2023-04-22T13:59:37.62 1.0 negative manual P 35 78.6657 50 -0.03 24
IV.MML1.EHZ. 2023-04-22T13:59:36.81 0.6 negative manual P 21 71.7726 50 0.21 48
IV.MGAB.HHZ. 2023-04-22T13:59:35.17 0.3 undecidable manual P 316 62.7927 50 -0.03 75
IV.MOMA.HHZ. 2023-04-22T13:59:35.76 0.3 undecidable manual S 348 33.2445 103 0.25 76
IT.GNU.HGE. 2023-04-22T13:59:35.01 0.3 undecidable manual S 348 33.2445 103 -0.5 72
IV.FDMO.HHZ. 2023-04-22T13:59:35.82 0.3 undecidable manual P 31 68.2761 50 -0.23 72
IV.LNSS.HHZ. 2023-04-22T13:59:35.61 0.6 undecidable manual S 72 33.2445 103 0.11 52
IV.SRES.HHZ. 2023-04-22T13:59:35.18 0.3 undecidable manual S 201 32.5452 103 -0.06 79
IV.CESI.HHZ. 2023-04-22T13:59:34.26 0.3 undecidable manual P 20 58.5969 50 -0.3 72
IV.ASSB.HHZ. 2023-04-22T13:59:34.51 0.3 undecidable manual P 0 59.0964 50 -0.12 74
IV.NRCA.HHZ. 2023-04-22T13:59:33.33 0.6 negative manual P 46 52.0035 50 -0.22 49
IV.GAVE.EHN. 2023-04-22T13:59:33.34 0.3 undecidable manual S 44 28.2495 105 -0.46 73
IV.RM33.EHZ. 2023-04-22T13:59:32.38 0.3 undecidable manual P 90 45.9207 50 -0.23 75
IV.SRES.HHZ. 2023-04-22T13:59:30.88 1.0 undecidable manual P 201 32.5452 103 0.53 24
IV.MOMA.HHZ. 2023-04-22T13:59:30.02 0.3 positive manual P 348 33.2445 103 -0.48 72
IT.GNU.HGE. 2023-04-22T13:59:30.28 0.6 undecidable manual P 348 33.2445 103 -0.22 51
IV.LNSS.HHZ. 2023-04-22T13:59:30.37 0.3 undecidable manual P 72 33.2445 103 -0.13 78
IV.ARRO.EHZ. 2023-04-22T13:59:29.34 0.6 undecidable manual S 50 11.9769 122 0.76 45
IV.GAVE.EHN. 2023-04-22T13:59:29.26 0.3 undecidable manual P 44 28.2495 105 -0.25 77
IV.CESX.HHZ. 2023-04-22T13:59:28.78 0.3 undecidable manual S 334 12.1767 122 0.14 81
IV.RCAV.EHZ. 2023-04-22T13:59:27.75 3.0 undecidable manual P -2.89 0
IV.CESX.HHZ. 2023-04-22T13:59:26.79 0.6 positive manual P 334 12.1767 122 0.25 53
IV.ARRO.EHZ. 2023-04-22T13:59:26.98 0.1 positive manual P 50 11.9769 122 0.48 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.8 0.00086 1.58 AML other m 2023-04-22T13:59:28.15
IV.CESX.HHE. ML:1.9 0.0009699999999999999 0.42 AML other m 2023-04-22T13:59:29.18
IV.ARRO.EHN. ML:1.7 0.0006145 0.84 AML other m 2023-04-22T13:59:30.53
IV.ARRO.EHE. ML:1.6 0.0005740000000000001 0.2 AML other m 2023-04-22T13:59:31.30
IV.MOMA.HHE. ML:1.9 0.00035999999999999997 1.3 AML other m 2023-04-22T13:59:35.09
IV.MOMA.HNE. ML:1.9 0.0003595 1.32 AML other m 2023-04-22T13:59:35.09
IV.MOMA.HHN. ML:1.5 0.000133 1.2 AML other m 2023-04-22T13:59:36.89
IV.MOMA.HNN. ML:1.8 0.0003085 1.16 AML other m 2023-04-22T13:59:36.30
IV.LNSS.HHE. ML:1.8 0.0002445 0.14 AML other m 2023-04-22T13:59:36.86
IV.LNSS.HHN. ML:1.7 0.00020649999999999998 1.38 AML other m 2023-04-22T13:59:38.84
IV.RM33.EHN. ML:1.3 0.00006415 0.18 AML other m 2023-04-22T13:59:42.05
IV.NRCA.HHN. ML:1.6 0.00009029999999999999 0.12 AML other m 2023-04-22T13:59:42.51
IV.RM33.EHE. ML:1.3 0.00006625 0.7 AML other m 2023-04-22T13:59:42.84
IV.NRCA.HHE. ML:1.8 0.000144 0.14 AML other m 2023-04-22T13:59:43.33
IV.CESI.HHE. ML:1.4 0.00005465000000000001 0.46 AML other m 2023-04-22T13:59:44.63
IV.MGAB.HHN. ML:1.7 0.0001065 1.44 AML other m 2023-04-22T13:59:45.91
IV.ASSB.HHE. ML:1.4 0.0000499 1.42 AML other m 2023-04-22T13:59:45.23
IV.FDMO.HHE. ML:1.5 0.00005475 0.2 AML other m 2023-04-22T13:59:46.43
IV.FDMO.HHN. ML:1.5 0.00005895 0.18 AML other m 2023-04-22T13:59:46.51
IV.CESI.HHN. ML:1.6 0.00009609999999999999 0.94 AML other m 2023-04-22T13:59:46.28
IV.MGAB.HHE. ML:1.8 0.00011999999999999999 0.42 AML other m 2023-04-22T13:59:49.51
IV.ASSB.HHN. ML:1.4 0.00005300000000000001 0.4 AML other m 2023-04-22T13:59:49.33
IV.CSP1.EHE. ML:1.8 0.00010075000000000001 0.5 AML other m 2023-04-22T13:59:49.71
IV.CSP1.EHN. ML:1.8 0.00010109999999999999 1.24 AML other m 2023-04-22T13:59:51.07
IV.RCAV.EHN. ML:1.4 0.0000423 1.08 AML other m 2023-04-22T13:59:51.10
IV.MML1.EHN. ML:1.4 0.00003785 1.26 AML other m 2023-04-22T13:59:52.89
IV.MML1.EHE. ML:1.5 0.0000514 0.42 AML other m 2023-04-22T13:59:53.37
IV.RCAV.EHE. ML:1.5 0.000051200000000000004 0.66 AML other m 2023-04-22T13:59:54.87
IV.SENI.EHN. ML:2.4 0.00015000000000000001 0.9 AML other m 2023-04-22T13:59:55.47
IV.VAGA.HHN. ML:1.8 0.000022700000000000003 0.42 AML other m 2023-04-22T13:59:58.72
IV.SENI.EHE. ML:2.4 0.000157 0.84 AML other m 2023-04-22T14:00:05.25
IV.VAGA.HHE. ML:1.6 0.000014675000000000001 0.66 AML other m 2023-04-22T14:00:14.39
IX.COL3.HHN.02 ML:2.7 0.00005785 0.5 AML other m 2023-04-22T14:00:36.27
IX.COL3.HHE.02 ML:2.4 0.000028450000000000004 0.5 AML other m 2023-04-22T14:01:07.68
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