Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 04-08-2023 and time 01:34:23 (Italy) in region 4 km NW Colle di Tora (RI)

A magnitude ML 1.7 earthquake occured in region: 4 km NW Colle di Tora (RI), on

  • 03-08-2023 23:34:23 (UTC)
  • 04-08-2023 01:34:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.2390, 12.9110 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.

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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
Torricella in Sabina RI 4 1342 1342
Colle di Tora RI 4 372 1714
Monteleone Sabino RI 4 1224 2938
Rocca Sinibalda RI 4 815 3753
Poggio Moiano RI 5 2751 6504
Castel di Tora RI 5 288 6792
Poggio San Lorenzo RI 6 589 7381
Longone Sabino RI 6 597 7978
Ascrea RI 9 234 8212
Frasso Sabino RI 9 743 8955
Casaprota RI 9 744 9699
Paganico Sabino RI 9 172 9871
Varco Sabino RI 9 187 10058
Belmonte in Sabina RI 9 636 10694
Montenero Sabino RI 9 299 10993
Pozzaglia Sabina RI 10 360 11353
Poggio Nativo RI 10 2622 13975
Scandriglia RI 10 3108 17083
Marcetelli RI 11 89 17172
Concerviano RI 11 291 17463
Orvinio RI 12 405 17868
Collegiove RI 13 213 18081
Nerola RM 13 1926 20007
Mompeo RI 13 530 20537
Toffia RI 13 1058 21595
Salisano RI 14 567 22162
Turania RI 14 241 22403
Castelnuovo di Farfa RI 14 1059 23462
Montorio Romano RM 14 1984 25446
Petrella Salto RI 15 1197 26643
Monte San Giovanni in Sabina RI 15 714 27357
Fara in Sabina RI 15 13742 41099
Monteflavio RM 16 1348 42447
Percile RM 16 255 42702
Collalto Sabino RI 16 442 43144
Nespolo RI 16 246 43390
Cittaducale RI 17 6828 50218
Vivaro Romano RM 17 182 50400
Moricone RM 18 2650 53050
Fiamignano RI 18 1413 54463
Montopoli di Sabina RI 18 4210 58673
Montelibretti RM 18 5323 63996
Licenza RM 18 1011 65007
Vallinfreda RM 18 283 65290
Poggio Mirteto RI 19 6315 71605
Rieti RI 19 47698 119303
Poggio Catino RI 19 1341 120644
Pescorocchiano RI 20 2075 122719

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NE of Guidonia Montecelio (88673 inhabitants)
32 Km N of Tivoli (56533 inhabitants)
42 Km SE of Terni (111501 inhabitants)
42 Km W of L'Aquila (69753 inhabitants)
52 Km NE of Roma (2864731 inhabitants)
62 Km N of Velletri (53303 inhabitants)
69 Km E of Viterbo (67173 inhabitants)
72 Km NE of Pomezia (62966 inhabitants)
75 Km N of Aprilia (73446 inhabitants)
76 Km NE of Fiumicino (78395 inhabitants)
80 Km SW of Teramo (54892 inhabitants)
82 Km S of Foligno (57155 inhabitants)
86 Km N of Latina (125985 inhabitants)
91 Km N of Anzio (54211 inhabitants)
94 Km E of Civitavecchia (52991 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
Reviewed
Rev100 		ML 1.7 2023-08-03
23:34:23		 42.2387 12.9113 16 2023-08-03
23:44:08		 Sala Sismica INGV-Roma 119837621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-03 23:34:23 ± 0.09
Latitude 42.2387 ± 0.0045
Longitude 12.9113 ± 0.0085
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 119837621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 690
Semi-minor axis of confidence ellipse (meter) 242
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 271
Circular confidence region, given by single value of horizontal uncertainty (meter) 690.0
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 35
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.87954
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 19
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 44
Type of magnitude ML
Reference to an origin 119837621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-03 23:44:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PII.HHZ. 2023-08-03T23:35:34.38 3.0 undecidable manual Sg 5.88 0
GE.MATE.HHZ. 2023-08-03T23:35:25.92 3.0 undecidable manual Pg 12.45 0
IV.MML1.EHZ. 2023-08-03T23:34:54.13 0.6 undecidable manual S 3 97.125 93 1.86 19
IV.POFI.HHZ. 2023-08-03T23:34:51.31 3.0 undecidable manual S -0.49 0
IV.LATB.EHZ. 2023-08-03T23:34:48.67 3.0 undecidable manual S -1.38 0
IV.GIUL.HHZ. 2023-08-03T23:34:48.11 3.0 undecidable manual S -1.43 0
IV.GUAR.HHZ. 2023-08-03T23:34:42.54 3.0 undecidable manual S -0.8 0
IV.MGAB.HHZ. 2023-08-03T23:34:41.44 3.0 undecidable manual P 0.67 0
IV.CSP1.EHZ. 2023-08-03T23:34:40.25 0.1 undecidable manual P 14 97.6245 93 -0.08 85
IV.MF5.EHZ. 2023-08-03T23:34:40.12 0.1 undecidable manual P 28 94.4388 93 0.28 82
IV.GUMA.HHZ. 2023-08-03T23:34:40.53 3.0 negative manual P -0.16 0
IV.MML1.EHZ. 2023-08-03T23:34:40.40 0.6 negative manual P 3 97.125 93 0.14 42
IV.ASSB.HHZ. 2023-08-03T23:34:39.46 0.1 undecidable manual P 347 91.5417 93 0.06 86
IV.FDMO.HHZ. 2023-08-03T23:34:38.89 0.1 undecidable manual P 9 89.6436 93 -0.22 84
IV.MMO1.EHZ. 2023-08-03T23:34:37.51 0.1 undecidable manual P 25 80.7636 94 -0.23 85
IV.NRCA.HHZ. 2023-08-03T23:34:35.49 0.1 undecidable manual P 14 68.0763 95 -0.29 86
IV.CERT.HHZ. 2023-08-03T23:34:34.96 0.6 undecidable manual S 170 32.6451 103 -0.2 47
IV.PTQR.HHZ. 2023-08-03T23:34:33.62 1.0 positive manual P 121 46.9197 98 1.08 17
IV.FAGN.HHZ. 2023-08-03T23:34:33.96 0.3 negative manual P 87 55.3002 96 0.13 69
IV.MTCE.HHZ. 2023-08-03T23:34:33.78 0.3 undecidable manual S 210 27.6501 106 -0.1 73
IV.SMA1.EHZ. 2023-08-03T23:34:33.77 0.6 positive manual P 38 55.5999 96 -0.11 46
IV.CESX.HHZ. 2023-08-03T23:34:33.10 0.1 undecidable manual P 327 48.9177 97 0.25 90
IT.CSO1.HGZ. 2023-08-03T23:34:32.24 0.6 undecidable manual S 136 21.0678 114 0.02 50
IV.AQU.HHZ. 2023-08-03T23:34:31.90 3.0 undecidable manual P 0
IV.RM33.EHZ. 2023-08-03T23:34:31.16 0.1 undecidable manual P 40 38.9277 100 -0.17 93
IV.FIAM.HHZ. 2023-08-03T23:34:31.39 0.6 undecidable manual S 79 17.1717 121 0.09 50
IV.RCAV.EHZ. 2023-08-03T23:34:31.79 3.0 undecidable manual P -0.12 0
IV.LNSS.HHZ. 2023-08-03T23:34:31.46 0.1 undecidable manual P 15 41.7249 99 -0.3 90
IV.ARRO.EHZ. 2023-08-03T23:34:31.33 0.1 undecidable manual P 343 39.627 100 -0.11 94
IV.CERT.HHZ. 2023-08-03T23:34:30.33 0.1 positive manual P 170 32.6451 103 -0.05 97
IT.MMP1.HGZ. 2023-08-03T23:34:30.37 0.6 undecidable manual S 275 13.4754 130 -0.12 49
IV.MTCE.HHZ. 2023-08-03T23:34:29.65 0.1 undecidable manual P 210 27.6501 106 0.01 98
IT.CSO1.HGZ. 2023-08-03T23:34:28.87 0.1 undecidable manual P 136 21.0678 114 0.18 96
IV.FIAM.HHZ. 2023-08-03T23:34:28.19 0.1 positive manual P 79 17.1717 121 0.03 100
IT.MMP1.HGZ. 2023-08-03T23:34:27.77 0.1 undecidable manual P 275 13.4754 130 0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FIAM.HHE. ML:1.7 0.000354 0.98 AML other m 2023-08-03T23:34:31.83
IV.FIAM.HNE. ML:1.8 0.0005075 0.96 AML other m 2023-08-03T23:34:31.83
IV.FIAM.HHN. ML:1.8 0.000406 0.76 AML other m 2023-08-03T23:34:31.48
IV.FIAM.HNN. ML:1.7 0.000374 0.2 AML other m 2023-08-03T23:34:32.13
IV.MTCE.HHN. ML:1.9 0.00039449999999999994 1.52 AML other m 2023-08-03T23:34:33.90
IV.MTCE.HHE. ML:1.7 0.000254 0.64 AML other m 2023-08-03T23:34:34.15
IV.CERT.HNN. ML:1.9 0.000309 0.26 AML other m 2023-08-03T23:34:35.19
IV.CERT.HHN. ML:2.0 0.0003685 0.94 AML other m 2023-08-03T23:34:35.20
IV.CERT.HHE. ML:1.5 0.000122 0.42 AML other m 2023-08-03T23:34:36.17
IV.CERT.HNE. ML:1.9 0.000336 0.32 AML other m 2023-08-03T23:34:37.16
IV.RCAV.EHN. ML:1.8 0.00019700000000000002 0.34 AML other m 2023-08-03T23:34:38.69
IV.RCAV.EHE. ML:1.9 0.0002285 0.48 AML other m 2023-08-03T23:34:38.70
IV.LNSS.HHE. ML:1.7 0.000156 0.54 AML other m 2023-08-03T23:34:39.04
IV.ARRO.EHN. ML:1.8 0.00022250000000000001 1.04 AML other m 2023-08-03T23:34:39.71
IV.RM33.EHN. ML:1.4 0.0000954 1.36 AML other m 2023-08-03T23:34:39.72
IV.LNSS.HHN. ML:1.6 0.0001275 0.14 AML other m 2023-08-03T23:34:40.55
IV.ARRO.EHE. ML:1.6 0.0001295 0.2 AML other m 2023-08-03T23:34:41.47
IV.CESX.HHN. ML:1.6 0.00009925 1.42 AML other m 2023-08-03T23:34:42.13
IV.CESX.HHE. ML:1.3 0.000054199999999999996 0.18 AML other m 2023-08-03T23:34:42.21
IV.RM33.EHE. ML:1.6 0.000135 0.64 AML other m 2023-08-03T23:34:42.41
IV.PTQR.HHE. ML:1.2 0.0000446 0.8 AML other m 2023-08-03T23:34:43.57
IV.PTQR.HHN. ML:1.1 0.0000346 0.26 AML other m 2023-08-03T23:34:43.82
IV.GUAR.HHN. ML:1.8 0.00014250000000000002 0.68 AML other m 2023-08-03T23:34:44.03
IV.GUAR.HHE. ML:1.8 0.0001315 0.34 AML other m 2023-08-03T23:34:44.82
IV.FAGN.HHE. ML:1.8 0.000128 0.58 AML other m 2023-08-03T23:34:44.66
IV.NRCA.HHN. ML:1.8 0.00010355000000000001 0.52 AML other m 2023-08-03T23:34:45.90
IV.SMA1.EHN. ML:2.1 0.00026000000000000003 0.38 AML other m 2023-08-03T23:34:46.13
IV.SMA1.EHE. ML:2.1 0.000272 0.74 AML other m 2023-08-03T23:34:46.56
IV.NRCA.HHE. ML:1.8 0.00010805000000000001 0.68 AML other m 2023-08-03T23:34:47.82
IV.FAGN.HHN. ML:1.8 0.0001385 0.42 AML other m 2023-08-03T23:34:50.02
IV.FDMO.HHN. ML:1.5 0.0000392 0.98 AML other m 2023-08-03T23:34:51.41
IV.FDMO.HHE. ML:1.8 0.00007264999999999999 1.78 AML other m 2023-08-03T23:34:52.02
IV.GIUL.HHE. ML:1.4 0.0000369 0.98 AML other m 2023-08-03T23:34:52.30
IV.MMO1.EHN. ML:1.7 0.00006459999999999998 1 AML other m 2023-08-03T23:34:52.60
IV.ASSB.HHN. ML:1.7 0.00005954999999999999 0.42 AML other m 2023-08-03T23:34:53.54
IV.ASSB.HHE. ML:1.7 0.0000605 1.66 AML other m 2023-08-03T23:34:54.98
IV.MML1.EHE. ML:2.0 0.00010839999999999999 0.26 AML other m 2023-08-03T23:34:54.47
IV.GIUL.HHN. ML:1.5 0.000043899999999999996 0.36 AML other m 2023-08-03T23:34:54.68
IV.MML1.EHN. ML:1.6 0.000046049999999999994 1.12 AML other m 2023-08-03T23:34:55.84
IV.MGAB.HHN. ML:1.7 0.000056099999999999995 0.26 AML other m 2023-08-03T23:34:55.87
IV.MGAB.HHE. ML:1.8 0.00006165 0.84 AML other m 2023-08-03T23:34:56.56
IV.POFI.HHN. ML:1.2 0.00002005 0.86 AML other m 2023-08-03T23:34:57.17
IV.MMO1.EHE. ML:1.7 0.00006385000000000001 1.58 AML other m 2023-08-03T23:34:59.97
IV.POFI.HHE. ML:1.2 0.00001835 0.44 AML other m 2023-08-03T23:34:59.24
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