Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 29-08-2020 and time 00:54:22 (Italy) in region 5 km W Lariano (RM)

A magnitude ML 1.4 earthquake occured in region: 5 km W Lariano (RM), on

  • 28-08-2020 22:54:22 (UTC)
  • 29-08-2020 00:54:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7430, 12.7800 at 11 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
Lariano RM 5 13432 13432
Nemi RM 6 1943 15375
Rocca Priora RM 6 11962 27337
Rocca di Papa RM 6 17034 44371
Velletri RM 6 53303 97674
Monte Compatri RM 8 11978 109652
Genzano di Roma RM 8 23970 133622
San Cesareo RM 9 15153 148775
Ariccia RM 9 19407 168182
Lanuvio RM 9 13632 181814
Monte Porzio Catone RM 10 8693 190507
Albano Laziale RM 10 41715 232222
Labico RM 10 6379 238601
Marino RM 10 43026 281627
Colonna RM 11 4287 285914
Grottaferrata RM 11 20327 306241
Castel Gandolfo RM 11 8997 315238
Frascati RM 11 22087 337325
Artena RM 11 14276 351601
Zagarolo RM 12 17843 369444
Valmontone RM 12 15959 385403
Rocca Massima LT 14 1136 386539
Palestrina RM 14 21672 408211
Gallicano nel Lazio RM 15 6334 414545
Castel San Pietro Romano RM 15 902 415447
Cave RM 15 11287 426734
Cori LT 16 11065 437799
Ciampino RM 16 38412 476211
Cisterna di Latina LT 17 36868 513079
Rocca di Cave RM 18 377 513456
Poli RM 19 2418 515874
Genazzano RM 19 6036 521910
Colleferro RM 19 21595 543505
Capranica Prenestina RM 20 351 543856
Aprilia LT 20 73446 617302

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km N of Velletri (53303 inhabitants)
20 Km NE of Aprilia (73446 inhabitants)
24 Km E of Pomezia (62966 inhabitants)
25 Km S of Tivoli (56533 inhabitants)
29 Km S of Guidonia Montecelio (88673 inhabitants)
30 Km SE of Roma (2864731 inhabitants)
32 Km NW of Latina (125985 inhabitants)
35 Km NE of Anzio (54211 inhabitants)
45 Km E of Fiumicino (78395 inhabitants)
85 Km SW of L'Aquila (69753 inhabitants)
90 Km E of Civitavecchia (52991 inhabitants)
92 Km S of Terni (111501 inhabitants)
93 Km SE of Viterbo (67173 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 1.4 2020-08-28
22:54:22		 41.7432 12.7798 11 2020-11-19
12:37:04		 Bollettino Sismico Italiano INGV 83880511
Reviewed
Rev100 		ML 1.4 2020-08-28
22:54:22		 41.7258 12.7973 9 2020-08-28
23:03:33		 Sala Sismica INGV-Roma 82421951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-28 22:54:22 ± 0.1
Latitude 41.7432 ± 0.0081
Longitude 12.7798 ± 0.0096
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83880511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 860
Semi-minor axis of confidence ellipse (meter) 721
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00989
Epicentral distance of station farthest from the epicenter (degree) 0.69608
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 82421951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-28 23:03:33

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 83880511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-17 03:05:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.POFI.HNE. 2020-08-28T22:54:46.20 0.6 undecidable manual S 92 77.2671 50 0.98 32
IV.VVLD.HHZ. 2020-08-28T22:54:43.66 0.6 undecidable manual S 78 71.1732 50 0.06 44
IV.GIUL.HHZ. 2020-08-28T22:54:36.69 0.6 undecidable manual S 117 44.4222 50 0.23 44
IV.POFI.HNE. 2020-08-28T22:54:36.07 0.6 undecidable manual P 92 77.2671 50 0.65 37
IV.VVLD.HHZ. 2020-08-28T22:54:34.43 0.6 undecidable manual P 78 71.1732 50 -0.06 44
IV.LATB.EHE. 2020-08-28T22:54:32.69 0.6 undecidable manual S 151 31.5462 50 -0.34 44
IV.MTCE.HHZ. 2020-08-28T22:54:32.49 0.6 undecidable manual S 354 31.1466 50 -0.44 43
IV.GIUL.HHZ. 2020-08-28T22:54:30.13 0.1 positive manual P 117 44.4222 50 -0.23 89
IV.SAMA.EHZ. 2020-08-28T22:54:28.64 0.6 undecidable manual S 285 16.0728 123 -0.07 48
IV.RCAV.EHZ. 2020-08-28T22:54:28.79 0.6 undecidable manual S 50 17.871 121 -0.47 44
IV.MTCE.HHZ. 2020-08-28T22:54:28.03 0.3 undecidable manual P 354 31.1466 50 -0.29 67
IV.LATB.EHE. 2020-08-28T22:54:27.99 0.6 undecidable manual P 151 31.5462 50 -0.39 44
IV.RMP.HHZ. 2020-08-28T22:54:27.50 0.6 undecidable manual S 321 9.7791 137 0.45 45
IV.SAMA.EHZ. 2020-08-28T22:54:26.04 0.1 undecidable manual P 285 16.0728 123 0.15 95
IV.RCAV.EHZ. 2020-08-28T22:54:26.40 0.3 undecidable manual P 50 17.871 121 0.19 70
IV.RDP.HHZ. 2020-08-28T22:54:26.22 0.6 undecidable manual S 288 6.0939 150 -0.05 49
IV.RMP.HHZ. 2020-08-28T22:54:25.02 0.1 undecidable manual P 321 9.7791 137 0.09 97
IV.VIVA.HHZ. 2020-08-28T22:54:25.23 0.3 undecidable manual S 314 1.0989 174 -0.5 68
IV.RDP.HHZ. 2020-08-28T22:54:24.83 0.1 undecidable manual P 288 6.0939 150 0.35 93
IV.VIVA.HHZ. 2020-08-28T22:54:24.16 0.1 undecidable manual P 314 1.0989 174 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VIVA.HHE. ML:2.2 0.0027185725 0.1152 AML other m 2020-08-28T22:54:25.39
IV.VIVA.HHN. ML:2.0 0.00189 0.62 AML other m 2020-08-28T22:54:25.33
IV.RDP.HHE. ML:1.3 0.00028700000000000004 0.3 AML other m 2020-08-28T22:54:26.30
IV.RDP.HHN. ML:1.5 0.00047799999999999996 0.94 AML other m 2020-08-28T22:54:27.07
IV.RMP.HHN. ML:1.5 0.00037238064999999996 0.2944 AML other m 2020-08-28T22:54:28.52
IV.RMP.HHE. ML:1.4 0.0002923746 0.0896 AML other m 2020-08-28T22:54:28.71
IV.GIUL.HHE. ML:0.7 0.000014279675 2.1632 AML other m 2020-08-28T22:54:38.02
IV.GIUL.HHN. ML:0.7 0.000013443 1.4848 AML other m 2020-08-28T22:54:38.06
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