Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 01-07-2020 and time 00:22:36 (Italy) in region 3 km E Guidonia Montecelio (RM)

A magnitude ML 1.3 earthquake occured in region: 3 km E Guidonia Montecelio (RM), on

  • 30-06-2020 22:22:36 (UTC)
  • 01-07-2020 00:22:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9900, 12.7580 at 6 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
Guidonia Montecelio RM 3 88673 88673
Tivoli RM 5 56533 145206
Marcellina RM 6 7280 152486
Sant'Angelo Romano RM 6 5018 157504
San Polo dei Cavalieri RM 7 2992 160496
Palombara Sabina RM 9 13269 173765
Castel Madama RM 9 7399 181164
Mentana RM 11 22921 204085
Fonte Nuova RM 11 32562 236647
Vicovaro RM 12 4019 240666
San Gregorio da Sassola RM 12 1619 242285
Roccagiovine RM 14 263 242548
Monterotondo RM 14 40830 283378
Casape RM 14 744 284122
Moricone RM 14 2650 286772
Gallicano nel Lazio RM 14 6334 293106
Mandela RM 15 917 294023
Monteflavio RM 15 1348 295371
Sambuci RM 15 925 296296
Licenza RM 15 1011 297307
Ciciliano RM 16 1336 298643
Poli RM 16 2418 301061
Saracinesco RM 16 185 301246
Montelibretti RM 16 5323 306569
Montorio Romano RM 17 1984 308553
Colonna RM 17 4287 312840
Percile RM 17 255 313095
Zagarolo RM 18 17843 330938
Cineto Romano RM 18 601 331539
San Cesareo RM 19 15153 346692
Pisoniano RM 19 770 347462
Cerreto Laziale RM 19 1118 348580
Anticoli Corrado RM 19 915 349495
Nerola RM 19 1926 351421
Monte Porzio Catone RM 20 8693 360114
Castel San Pietro Romano RM 20 902 361016
Palestrina RM 20 21672 382688

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km E of Guidonia Montecelio (88673 inhabitants)
5 Km NW of Tivoli (56533 inhabitants)
25 Km E of Roma (2864731 inhabitants)
34 Km N of Velletri (53303 inhabitants)
41 Km NE of Pomezia (62966 inhabitants)
45 Km N of Aprilia (73446 inhabitants)
49 Km NE of Fiumicino (78395 inhabitants)
59 Km N of Latina (125985 inhabitants)
61 Km N of Anzio (54211 inhabitants)
64 Km S of Terni (111501 inhabitants)
66 Km SW of L'Aquila (69753 inhabitants)
72 Km SE of Viterbo (67173 inhabitants)
80 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
Bulletin
Rev1000 		ML 1.3 2020-06-30
22:22:36		 41.9903 12.7578 6 2020-11-19
12:37:05		 Bollettino Sismico Italiano INGV 84151711
Reviewed
Rev100 		ML 1.3 2020-06-30
22:22:36		 41.9858 12.752 7 2020-06-30
22:37:52		 Sala Sismica INGV-Roma 80658901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-06-30 22:22:36 ± 0.1
Latitude 41.9903 ± 0.0036
Longitude 12.7578 ± 0.0073
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84151711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 332
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 273
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38491
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 84151711
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-26 11:07:37

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 80658901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-06-30 22:37:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PZUN.HHZ. 2020-06-30T22:23:55.25 3.0 undecidable manual Sn 0.83 0
IV.PAOL.HHZ. 2020-06-30T22:23:32.23 3.0 undecidable manual Sn 0.72 0
IV.ROSPO.HHZ. 2020-06-30T22:23:20.65 3.0 undecidable manual Sg -0.22 0
IV.FIAM.HNE. 2020-06-30T22:22:52.12 0.6 undecidable manual S 44 42.7239 50 0.4 43
IV.RDP.HHZ. 2020-06-30T22:22:46.40 0.6 undecidable manual S 189 25.8519 103 0.41 45
IV.VIVA.HHN. 2020-06-30T22:22:46.23 0.6 undecidable manual S 178 26.6511 103 -0.05 48
IV.FIAM.HNE. 2020-06-30T22:22:45.19 0.3 undecidable manual P 44 42.7239 50 -0.22 68
IV.RCAV.EHE. 2020-06-30T22:22:44.83 0.6 undecidable manual S 136 22.1556 106 0.06 48
IV.RMP.HHN. 2020-06-30T22:22:44.10 0.6 undecidable manual S 192 20.2686 107 -0.03 49
IV.CERT.HHZ. 2020-06-30T22:22:43.98 0.6 undecidable manual S 104 19.0698 108 0.25 47
IV.VIVA.HHN. 2020-06-30T22:22:42.25 0.6 undecidable manual P 178 26.6511 103 -0.01 48
IV.RDP.HHZ. 2020-06-30T22:22:42.27 0.6 undecidable manual P 189 25.8519 103 0.17 47
IV.RCAV.EHE. 2020-06-30T22:22:41.00 0.3 undecidable manual P 136 22.1556 106 -0.39 67
IV.CERT.HHZ. 2020-06-30T22:22:40.67 0.3 undecidable manual P 104 19.0698 108 -0.12 72
IV.ARVD.HHZ. 2020-06-30T22:22:40.63 3.0 undecidable manual P -0.84 0
IV.RMP.HHN. 2020-06-30T22:22:40.87 0.6 undecidable manual P 192 20.2686 107 -0.16 47
IV.MTCE.HHZ. 2020-06-30T22:22:39.39 0.3 undecidable manual S 340 3.7962 148 0.09 74
IV.TERO.HHZ. 2020-06-30T22:22:39.71 3.0 undecidable manual P 0.01 0
IV.ATMI.HHZ. 2020-06-30T22:22:38.89 3.0 negative manual P 0.29 0
IV.MTCE.HHZ. 2020-06-30T22:22:38.20 0.1 undecidable manual P 340 3.7962 148 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERT.HHN. ML:0.8 0.000047815255 0.4608 AML other m 2020-06-30T22:22:44.49
IV.RMP.HHE. ML:1.6 0.00028913735 1.68 AML other m 2020-06-30T22:22:44.04
IV.CERT.HHE. ML:1.0 0.000085402405 1.3984 AML other m 2020-06-30T22:22:47.22
IV.RMP.HHN. ML:1.6 0.00033658414999999996 0.32 AML other m 2020-06-30T22:22:48.79
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