Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 28-08-2020 and time 23:10:21 (UTC) in region 3 km NW Lariano (RM)

A magnitude ML 1.4 earthquake occured in region: 3 km NW Lariano (RM), on

  • 28-08-2020 23:10:21 (UTC)
  • 29-08-2020 01:10:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7440, 12.7990 at 9 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 3 13432 13432
Rocca Priora RM 6 11962 25394
Velletri RM 7 53303 78697
Nemi RM 7 1943 80640
Rocca di Papa RM 8 17034 97674
Labico RM 9 6379 104053
San Cesareo RM 9 15153 119206
Monte Compatri RM 9 11978 131184
Genzano di Roma RM 10 23970 155154
Artena RM 10 14276 169430
Monte Porzio Catone RM 11 8693 178123
Lanuvio RM 11 13632 191755
Valmontone RM 11 15959 207714
Colonna RM 11 4287 212001
Ariccia RM 11 19407 231408
Zagarolo RM 11 17843 249251
Albano Laziale RM 12 41715 290966
Grottaferrata RM 12 20327 311293
Marino RM 12 43026 354319
Frascati RM 12 22087 376406
Castel Gandolfo RM 12 8997 385403
Rocca Massima LT 12 1136 386539
Palestrina RM 13 21672 408211
Cave RM 14 11287 419498
Castel San Pietro Romano RM 14 902 420400
Gallicano nel Lazio RM 14 6334 426734
Cori LT 15 11065 437799
Rocca di Cave RM 17 377 438176
Cisterna di Latina LT 17 36868 475044
Colleferro RM 17 21595 496639
Genazzano RM 18 6036 502675
Ciampino RM 18 38412 541087
Poli RM 18 2418 543505
Capranica Prenestina RM 18 351 543856
Casape RM 20 744 544600
Segni RM 20 9159 553759

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km N of Velletri (53303 inhabitants)
21 Km NE of Aprilia (73446 inhabitants)
25 Km S of Tivoli (56533 inhabitants)
26 Km E of Pomezia (62966 inhabitants)
29 Km S of Guidonia Montecelio (88673 inhabitants)
31 Km SE of Roma (2864731 inhabitants)
32 Km N of Latina (125985 inhabitants)
36 Km NE of Anzio (54211 inhabitants)
47 Km E of Fiumicino (78395 inhabitants)
84 Km SW of L'Aquila (69753 inhabitants)
92 Km E of Civitavecchia (52991 inhabitants)
92 Km S of Terni (111501 inhabitants)
94 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
23:10:21		 41.7437 12.7987 9 2020-11-19
12:37:04		 Bollettino Sismico Italiano INGV 83880571
Reviewed
Rev100 		ML 1.3 2020-08-28
23:10:21		 41.7608 12.7902 8 2020-08-28
23:19:26		 Sala Sismica INGV-Roma 82422221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-28 23:10:21 ± 0.08
Latitude 41.7437 ± 0.0054
Longitude 12.7987 ± 0.0072
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83880571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 609
Semi-minor axis of confidence ellipse (meter) 593
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 187
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.02248
Epicentral distance of station farthest from the epicenter (degree) 0.68169
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 83880571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-17 03:08:27

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 82422221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-28 23:19:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.POFI.HNE. 2020-08-28T23:10:45.38 0.6 undecidable manual S 92 75.6687 50 0.86 47
IV.VVLD.HHZ. 2020-08-28T23:10:42.96 0.6 undecidable manual S 78 69.5748 50 0.05 60
IV.PTQR.HHZ. 2020-08-28T23:10:40.14 0.6 undecidable manual S 58 58.497 50 0.19 60
IV.GIUL.HHZ. 2020-08-28T23:10:36.10 0.6 undecidable manual S 118 43.0236 50 0.29 61
IV.POFI.HNE. 2020-08-28T23:10:34.38 0.3 undecidable manual P 92 75.6687 50 -0.37 83
IV.VVLD.HHZ. 2020-08-28T23:10:33.18 0.3 undecidable manual P 78 69.5748 50 -0.64 77
IV.LATB.EHZ. 2020-08-28T23:10:32.42 0.6 undecidable manual S 154 30.8469 106 -0.12 64
IV.PTQR.HHZ. 2020-08-28T23:10:31.78 0.3 undecidable manual P 58 58.497 50 -0.33 86
IV.GIUL.HHZ. 2020-08-28T23:10:29.44 0.6 undecidable manual P 118 43.0236 50 -0.28 60
IV.MTCE.HHZ. 2020-08-28T23:10:28.51 0.3 undecidable manual P 351 31.3464 50 0.59 85
IV.SAMA.EHZ. 2020-08-28T23:10:27.86 0.6 undecidable manual S 284 17.5713 117 -0.38 61
IV.RCAV.EHZ. 2020-08-28T23:10:27.84 0.3 undecidable manual S 46 16.6722 118 -0.13 100
IV.LATB.EHZ. 2020-08-28T23:10:27.53 1.0 undecidable manual P 154 30.8469 106 -0.3 31
IV.LAV9.HNZ. 2020-08-28T23:10:26.70 0.6 undecidable manual S 229 11.0778 129 0.38 62
IV.SAMA.EHZ. 2020-08-28T23:10:25.36 0.3 undecidable manual P 284 17.5713 117 0.01 99
IV.RDP.HHZ. 2020-08-28T23:10:25.31 0.6 undecidable manual S 284 7.5813 140 -0.15 66
IV.RCAV.EHZ. 2020-08-28T23:10:25.38 0.3 undecidable manual P 46 16.6722 118 0.19 95
IV.RMP.HHZ. 2020-08-28T23:10:25.97 0.6 undecidable manual S 314 10.878 130 -0.31 63
IV.RMP.HHZ. 2020-08-28T23:10:24.26 0.3 undecidable manual P 314 10.878 130 0.04 100
IV.LAV9.HNZ. 2020-08-28T23:10:24.38 0.6 undecidable manual P 229 11.0778 129 0.14 65
IV.VIVA.HHZ. 2020-08-28T23:10:24.51 0.6 undecidable manual S 287 2.4975 165 -0.11 68
IV.VIVA.HHZ. 2020-08-28T23:10:23.33 0.3 undecidable manual P 287 2.4975 165 0.07 100
IV.RDP.HHZ. 2020-08-28T23:10:23.97 0.3 undecidable manual P 284 7.5813 140 0.23 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RDP.HHE. ML:1.4 0.00037868740000000003 0.3456 AML other m 2020-08-28T23:10:26.14
IV.RDP.HHN. ML:1.5 0.00046560564999999996 0.2048 AML other m 2020-08-28T23:10:26.02
IV.RMP.HHN. ML:1.5 0.00037857790000000004 0.128 AML other m 2020-08-28T23:10:27.44
IV.RMP.HHE. ML:1.4 0.00028514735000000004 0.0768 AML other m 2020-08-28T23:10:27.62
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