Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 06-08-2023 and time 01:28:51 (Italy) in region 7 km NW Colonna (RM)

A magnitude ML 1.3 earthquake occured in region: 7 km NW Colonna (RM), on

  • 05-08-2023 23:28:51 (UTC)
  • 06-08-2023 01:28:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8930, 12.7100 at 11 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
Colonna RM 7 4287 4287
Monte Porzio Catone RM 9 8693 12980
Monte Compatri RM 10 11978 24958
Gallicano nel Lazio RM 10 6334 31292
Frascati RM 10 22087 53379
Tivoli RM 11 56533 109912
San Cesareo RM 11 15153 125065
Zagarolo RM 12 17843 142908
Rocca Priora RM 12 11962 154870
Grottaferrata RM 12 20327 175197
Guidonia Montecelio RM 12 88673 263870
Ciampino RM 13 38412 302282
Fonte Nuova RM 14 32562 334844
San Gregorio da Sassola RM 14 1619 336463
Marino RM 14 43026 379489
Rocca di Papa RM 14 17034 396523
Casape RM 15 744 397267
Poli RM 15 2418 399685
Sant'Angelo Romano RM 16 5018 404703
Palestrina RM 16 21672 426375
Castel Madama RM 16 7399 433774
Castel San Pietro Romano RM 16 902 434676
Marcellina RM 17 7280 441956
Castel Gandolfo RM 17 8997 450953
Mentana RM 17 22921 473874
San Polo dei Cavalieri RM 17 2992 476866
Albano Laziale RM 19 41715 518581
Roma RM 19 2864731 3383312
Labico RM 19 6379 3389691
Nemi RM 19 1943 3391634
Monterotondo RM 19 40830 3432464
Ariccia RM 19 19407 3451871
Palombara Sabina RM 20 13269 3465140

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SW of Tivoli (56533 inhabitants)
12 Km S of Guidonia Montecelio (88673 inhabitants)
19 Km E of Roma (2864731 inhabitants)
24 Km N of Velletri (53303 inhabitants)
30 Km NE of Pomezia (62966 inhabitants)
34 Km N of Aprilia (73446 inhabitants)
41 Km E of Fiumicino (78395 inhabitants)
50 Km N of Anzio (54211 inhabitants)
50 Km NW of Latina (125985 inhabitants)
75 Km S of Terni (111501 inhabitants)
76 Km SW of L'Aquila (69753 inhabitants)
77 Km SE of Viterbo (67173 inhabitants)
79 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 		Md 2.1
ML 1.3 		2023-08-05
23:28:51		 41.8928 12.7102 11 2023-08-05
23:36:10		 Sala Sismica INGV-Roma 119892961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-05 23:28:51 ± 0.16
Latitude 41.8928 ± 0.0081
Longitude 12.7102 ± 0.0133
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119892961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1018
Semi-minor axis of confidence ellipse (meter) 896
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 279
Circular confidence region, given by single value of horizontal uncertainty (meter) 1020.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52610
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 119892961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-05 23:36:10

Md:2.1

Field Value
Value 2.1
Uncertainty 0.0
Num. used stations 1
Type of magnitude Md
Reference to an origin 119892961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-05 23:36:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2023-08-05T23:29:26.86 3.0 undecidable manual S -2.58 0
IV.GIUL.HHZ. 2023-08-05T23:29:09.71 0.6 undecidable manual S 129 58.3971 50 0.46 43
IV.NRCA.HHZ. 2023-08-05T23:29:08.28 3.0 positive manual P -0.01 0
IV.LATB.EHZ. 2023-08-05T23:29:06.24 0.6 undecidable manual S 155 48.9177 50 -0.48 43
IV.GIUL.HHZ. 2023-08-05T23:29:01.25 1.0 negative manual P 129 58.3971 50 -0.32 22
IV.FIAM.HHZ. 2023-08-05T23:29:00.82 1.0 undecidable manual P 39 53.4021 50 0.01 24
IV.LATB.EHZ. 2023-08-05T23:28:59.76 1.0 negative manual P 155 48.9177 50 -0.36 22
IV.CERT.HHZ. 2023-08-05T23:28:59.71 0.6 undecidable manual S 74 23.2545 50 -0.16 49
IV.RCAV.EHZ. 2023-08-05T23:28:58.25 0.6 undecidable manual S 104 20.0688 118 -0.72 42
IV.RDP.HNN. 2023-08-05T23:28:58.29 0.3 undecidable manual S 180 14.6742 126 0.91 58
IV.MTCE.HHZ. 2023-08-05T23:28:57.85 0.6 undecidable manual S 10 14.6742 126 0.48 46
IV.LAV9.HNE. 2023-08-05T23:28:57.24 0.6 undecidable manual P 182 23.8539 50 0.99 37
IV.CERT.HHZ. 2023-08-05T23:28:56.13 0.6 undecidable manual P 74 23.2545 50 -0.03 50
IV.SAMA.EHN. 2023-08-05T23:28:56.90 0.6 undecidable manual S 218 15.7731 124 -0.8 41
IT.RMMM.HGE. 2023-08-05T23:28:56.03 0.1 undecidable manual P 279 21.5673 50 0.14 98
IV.VIVA.HHN. 2023-08-05T23:28:55.32 0.1 undecidable manual P 163 16.5723 123 0.28 96
IV.RCAV.EHZ. 2023-08-05T23:28:55.84 1.0 undecidable manual P 104 20.0688 118 0.2 24
IV.RDP.HNN. 2023-08-05T23:28:54.59 0.1 undecidable manual P 180 14.6742 126 -0.13 100
IV.MTCE.HHZ. 2023-08-05T23:28:54.21 1.0 undecidable manual P 10 14.6742 126 -0.51 23
IV.SAMA.EHN. 2023-08-05T23:28:54.42 0.1 undecidable manual P 218 15.7731 124 -0.48 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTCE.HHE. ML:1.4 0.00024249999999999999 0.4 AML other m 2023-08-05T23:28:59.80
IV.RCAV.EHN. ML:1.5 0.000227 0.24 AML other m 2023-08-05T23:28:59.60
IV.RCAV.EHE. ML:1.5 0.0002175 0.46 AML other m 2023-08-05T23:29:01.43
IV.MTCE.HHN. ML:1.3 0.000174 0.64 AML other m 2023-08-05T23:29:01.14
IV.CERT.HHN. ML:1.5 0.0001855 0.92 AML other m 2023-08-05T23:29:01.76
IV.CERT.HHE. ML:1.0 0.00006975 0.44 AML other m 2023-08-05T23:29:01.55
IV.FIAM.HHE. ML:1.3 0.00004985 0.96 AML other m 2023-08-05T23:29:10.71
IV.FIAM.HHN. ML:1.3 0.00004435 0.42 AML other m 2023-08-05T23:29:11.71
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