Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 29-08-2020 and time 11:36:04 (UTC) in region 4 km NW Lariano (RM)

A magnitude ML 1.6 earthquake occured in region: 4 km NW Lariano (RM), on

  • 29-08-2020 11:36:04 (UTC)
  • 29-08-2020 13:36:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7490, 12.7870 at 10 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
Rocca Priora RM 6 11962 25394
Rocca di Papa RM 7 17034 42428
Nemi RM 7 1943 44371
Velletri RM 7 53303 97674
Monte Compatri RM 8 11978 109652
San Cesareo RM 8 15153 124805
Genzano di Roma RM 9 23970 148775
Labico RM 9 6379 155154
Monte Porzio Catone RM 10 8693 163847
Colonna RM 10 4287 168134
Ariccia RM 10 19407 187541
Lanuvio RM 10 13632 201173
Grottaferrata RM 11 20327 221500
Marino RM 11 43026 264526
Frascati RM 11 22087 286613
Albano Laziale RM 11 41715 328328
Zagarolo RM 11 17843 346171
Artena RM 11 14276 360447
Castel Gandolfo RM 11 8997 369444
Valmontone RM 11 15959 385403
Palestrina RM 13 21672 407075
Rocca Massima LT 14 1136 408211
Gallicano nel Lazio RM 14 6334 414545
Castel San Pietro Romano RM 14 902 415447
Cave RM 14 11287 426734
Cori LT 16 11065 437799
Ciampino RM 16 38412 476211
Rocca di Cave RM 17 377 476588
Cisterna di Latina LT 18 36868 513456
Poli RM 18 2418 515874
Genazzano RM 18 6036 521910
Colleferro RM 18 21595 543505
Capranica Prenestina RM 19 351 543856
Casape RM 20 744 544600

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km N of Velletri (53303 inhabitants)
21 Km NE of Aprilia (73446 inhabitants)
24 Km S of Tivoli (56533 inhabitants)
25 Km E of Pomezia (62966 inhabitants)
29 Km S of Guidonia Montecelio (88673 inhabitants)
30 Km SE of Roma (2864731 inhabitants)
33 Km NW of Latina (125985 inhabitants)
36 Km NE of Anzio (54211 inhabitants)
46 Km E of Fiumicino (78395 inhabitants)
84 Km SW of L'Aquila (69753 inhabitants)
91 Km E of Civitavecchia (52991 inhabitants)
91 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 1.6 2020-08-29
11:36:04		 41.749 12.7867 10 2020-11-19
12:37:02		 Bollettino Sismico Italiano INGV 83005181
Reviewed
Rev100 		ML 1.7 2020-08-29
11:36:04		 41.7428 12.785 9 2020-08-29
11:43:01		 Sala Sismica INGV-Roma 82438001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-29 11:36:04 ± 0.08
Latitude 41.7490 ± 0.0063
Longitude 12.7867 ± 0.0060
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83005181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 645
Semi-minor axis of confidence ellipse (meter) 466
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 330
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.01259
Epicentral distance of station farthest from the epicenter (degree) 0.39840
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 83005181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-15 01:55:55

ML:1.7

Field Value
Value 1.7
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 82438001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-29 11:43:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHZ. 2020-08-29T11:36:19.38 0.3 undecidable manual S 118 44.2224 50 0.2 67
IV.LATB.EHZ. 2020-08-29T11:36:15.53 0.6 undecidable manual S 153 31.8459 50 -0.35 45
IV.GIUL.HHZ. 2020-08-29T11:36:12.58 0.3 undecidable manual P 118 44.2224 50 -0.43 64
IV.RCAV.EHE. 2020-08-29T11:36:11.35 0.3 undecidable manual S 50 17.0718 119 0.01 74
IV.LATB.EHZ. 2020-08-29T11:36:11.26 0.3 undecidable manual P 153 31.8459 50 0.16 70
IV.SAMA.EHZ. 2020-08-29T11:36:10.98 0.3 undecidable manual S 282 16.4724 120 -0.17 71
IV.LAV9.HNZ. 2020-08-29T11:36:10.07 0.6 undecidable manual S 223 10.6782 131 0.54 44
IV.RMP.HHZ. 2020-08-29T11:36:09.21 0.3 undecidable manual S 316 9.6792 134 -0.06 74
IV.MA9.HHZ. 2020-08-29T11:36:09.42 0.3 undecidable manual S 282 10.7781 131 -0.13 73
IV.RDP.HHZ. 2020-08-29T11:36:08.53 0.3 undecidable manual S 281 6.4935 146 -0.01 75
IV.RCAV.EHE. 2020-08-29T11:36:08.64 0.3 undecidable manual P 50 17.0718 119 0.16 71
IV.SAMA.EHZ. 2020-08-29T11:36:08.69 1.0 undecidable manual P 282 16.4724 120 0.32 23
IV.LAV9.HNZ. 2020-08-29T11:36:07.31 0.3 undecidable manual P 223 10.6782 131 -0.13 73
IV.VIVA.HHZ. 2020-08-29T11:36:07.61 0.1 undecidable manual S 276 1.3986 172 -0.28 95
IV.RDP.HHZ. 2020-08-29T11:36:07.06 0.3 undecidable manual P 281 6.4935 146 0.2 72
IV.RMP.HHZ. 2020-08-29T11:36:07.42 0.3 undecidable manual P 316 9.6792 134 0.14 73
IV.MA9.HHZ. 2020-08-29T11:36:07.61 0.6 undecidable manual P 282 10.7781 131 0.16 48
IV.VIVA.HHZ. 2020-08-29T11:36:06.53 0.1 negative manual P 276 1.3986 172 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VIVA.HHE. ML:2.1 0.002567398 0.1216 AML other m 2020-08-29T11:36:07.77
IV.VIVA.HHN. ML:2.1 0.0026256130000000006 0.2752 AML other m 2020-08-29T11:36:08.37
IV.RDP.HHE. ML:1.7 0.0008956594499999999 0.3392 AML other m 2020-08-29T11:36:09.35
IV.RDP.HHN. ML:1.8 0.0009914444 0.16 AML other m 2020-08-29T11:36:09.33
IV.RMP.HHE. ML:1.6 0.00061073595 0.2624 AML other m 2020-08-29T11:36:11.66
IV.RMP.HHN. ML:1.8 0.0009460475 0.32 AML other m 2020-08-29T11:36:12.69
IV.GIUL.HHE. ML:0.9 0.000025343784000000002 0.1984 AML other m 2020-08-29T11:36:19.69
IV.GIUL.HHN. ML:1.1 0.00003590784 1.12 AML other m 2020-08-29T11:36:19.89
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