Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 28-08-2020 and time 22:09:14 (Italy) in region 4 km NW Lariano (RM)

A magnitude ML 1.9 earthquake occured in region: 4 km NW Lariano (RM), on

  • 28-08-2020 20:09:14 (UTC)
  • 28-08-2020 22:09:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7510, 12.8010 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 4 13432 13432
Rocca Priora RM 6 11962 25394
Velletri RM 7 53303 78697
Rocca di Papa RM 8 17034 95731
San Cesareo RM 8 15153 110884
Nemi RM 8 1943 112827
Labico RM 8 6379 119206
Monte Compatri RM 8 11978 131184
Artena RM 10 14276 145460
Monte Porzio Catone RM 10 8693 154153
Genzano di Roma RM 10 23970 178123
Colonna RM 10 4287 182410
Valmontone RM 10 15959 198369
Zagarolo RM 10 17843 216212
Lanuvio RM 11 13632 229844
Ariccia RM 11 19407 249251
Frascati RM 12 22087 271338
Grottaferrata RM 12 20327 291665
Marino RM 12 43026 334691
Albano Laziale RM 12 41715 376406
Castel Gandolfo RM 12 8997 385403
Palestrina RM 12 21672 407075
Rocca Massima LT 13 1136 408211
Cave RM 13 11287 419498
Castel San Pietro Romano RM 13 902 420400
Gallicano nel Lazio RM 14 6334 426734
Cori LT 15 11065 437799
Rocca di Cave RM 16 377 438176
Genazzano RM 17 6036 444212
Poli RM 17 2418 446630
Colleferro RM 17 21595 468225
Ciampino RM 18 38412 506637
Capranica Prenestina RM 18 351 506988
Cisterna di Latina LT 18 36868 543856
Casape RM 19 744 544600
Segni RM 20 9159 553759
San Gregorio da Sassola RM 20 1619 555378

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km N of Velletri (53303 inhabitants)
22 Km NE of Aprilia (73446 inhabitants)
24 Km S of Tivoli (56533 inhabitants)
26 Km E of Pomezia (62966 inhabitants)
28 Km S of Guidonia Montecelio (88673 inhabitants)
31 Km SE of Roma (2864731 inhabitants)
33 Km N of Latina (125985 inhabitants)
37 Km NE of Anzio (54211 inhabitants)
47 Km E of Fiumicino (78395 inhabitants)
83 Km SW of L'Aquila (69753 inhabitants)
91 Km S of Terni (111501 inhabitants)
92 Km E of Civitavecchia (52991 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 1.9 2020-08-28
20:09:14		 41.7512 12.801 10 2020-11-19
12:37:04		 Bollettino Sismico Italiano INGV 83845841
Reviewed
Rev100 		ML 1.8 2020-08-28
20:09:14		 41.7508 12.7977 10 2020-08-28
20:25:03		 Sala Sismica INGV-Roma 82416731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-28 20:09:14 ± 0.06
Latitude 41.7512 ± 0.0054
Longitude 12.8010 ± 0.0060
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83845841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 509
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 338
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86155
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 82416731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-28 20:25:03

ML:1.9

Field Value
Value 1.9
Uncertainty 0.4
Num. used stations 30
Type of magnitude ML
Reference to an origin 83845841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-17 10:29:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
XK.SELL.HHZ. 2020-08-28T20:11:18.46 3.0 undecidable manual Sg 15.47 0
CR.STON.BHZ. 2020-08-28T20:11:04.10 3.0 undecidable manual Sn 6.26 0
ST.OZOL.EHZ. 2020-08-28T20:10:39.35 3.0 negative manual Pg 12.54 0
ST.ZIAN.EHZ. 2020-08-28T20:10:37.06 3.0 undecidable manual Pg 13.12 0
IV.PTCC.HHZ. 2020-08-28T20:10:29.37 3.0 negative manual Pn 4.63 0
IV.CPGN.EHZ. 2020-08-28T20:10:14.57 3.0 undecidable manual Sn -1.71 0
IV.CSNT.HHZ. 2020-08-28T20:10:14.28 3.0 undecidable manual Sn -1.36 0
IV.MMUR.HNZ. 2020-08-28T20:10:08.27 3.0 undecidable manual Sg 1.42 0
IV.ROSPO.HHZ. 2020-08-28T20:10:04.85 3.0 undecidable manual Sn -0.64 0
IX.STN3.HHZ.02 2020-08-28T20:10:02.94 3.0 undecidable manual Pg 8.76 0
IV.VULT.HHZ. 2020-08-28T20:09:59.61 3.0 positive manual Pg 8.31 0
IV.CMPR.HHZ. 2020-08-28T20:09:58.93 3.0 undecidable manual Pg 6.16 0
IV.TERO.HHZ. 2020-08-28T20:09:51.03 3.0 undecidable manual S 0.01 0
IV.PARC.HHZ. 2020-08-28T20:09:48.41 3.0 undecidable manual Pn 1.1 0
IV.LRP.EHZ. 2020-08-28T20:09:36.33 0.6 undecidable manual S 100 66.0894 50 1.26 29
IV.VVLD.HHZ. 2020-08-28T20:09:36.23 0.3 undecidable manual S 79 69.2751 50 0.32 64
IV.PTQR.HHZ. 2020-08-28T20:09:33.22 0.6 undecidable manual S 59 57.8976 50 0.33 43
IV.MCI.EHZ. 2020-08-28T20:09:30.16 1.0 undecidable manual P 109 88.7445 50 0.2 21
IV.INTR.HHZ. 2020-08-28T20:09:30.65 0.6 undecidable manual P 72 95.6376 50 -0.36 40
IV.BARO.EHZ. 2020-08-28T20:09:29.81 1.0 undecidable manual P 312 82.8504 50 0.78 18
IV.GIUL.HHZ. 2020-08-28T20:09:29.15 0.3 undecidable manual S 119 43.2234 50 0.18 69
IV.GUAR.HHZ. 2020-08-28T20:09:28.58 0.3 undecidable manual S 83 42.5241 50 -0.21 68
IV.TOLF.HHZ. 2020-08-28T20:09:28.19 0.6 undecidable manual P 298 74.6697 50 0.41 41
IV.POFI.HHZ. 2020-08-28T20:09:27.66 0.3 undecidable manual P 93 75.4689 50 -0.26 64
IT.RMMM.HGN. 2020-08-28T20:09:27.54 0.6 undecidable manual S 304 34.5432 50 0.89 37
IV.LRP.EHZ. 2020-08-28T20:09:26.41 0.3 undecidable manual P 100 66.0894 50 -0.05 68
IV.VVLD.HHZ. 2020-08-28T20:09:26.64 0.6 undecidable manual P 79 69.2751 50 -0.31 43
IV.PTQR.HHZ. 2020-08-28T20:09:25.20 0.6 undecidable manual P 59 57.8976 50 0 46
IV.MTCE.HHN. 2020-08-28T20:09:25.04 0.3 undecidable manual S 351 30.5472 50 -0.53 65
IV.LATB.EHZ. 2020-08-28T20:09:25.54 0.3 undecidable manual S 155 31.5462 50 -0.3 68
IV.GIUL.HHZ. 2020-08-28T20:09:22.68 0.1 negative manual P 119 43.2234 50 -0.26 90
IT.RMMM.HGN. 2020-08-28T20:09:22.10 1.0 undecidable manual P 304 34.5432 50 0.5 22
IV.GUAR.HHZ. 2020-08-28T20:09:22.54 0.3 undecidable manual P 83 42.5241 50 -0.3 67
IV.RCAV.EHZ. 2020-08-28T20:09:21.46 0.3 undecidable manual S 48 15.9729 122 0.23 71
IV.SAMA.EHZ. 2020-08-28T20:09:21.36 0.3 undecidable manual S 281 17.5713 119 -0.34 70
IV.MTCE.HHN. 2020-08-28T20:09:20.67 0.6 undecidable manual P 351 30.5472 50 -0.31 46
IV.LATB.EHZ. 2020-08-28T20:09:20.85 0.3 undecidable manual P 155 31.5462 50 -0.28 69
IV.LAV9.HNZ. 2020-08-28T20:09:20.63 0.6 undecidable manual S 226 11.7771 130 0.61 43
IV.MA9.HHZ. 2020-08-28T20:09:19.70 0.3 undecidable manual S 280 11.877 130 -0.37 70
IV.RMP.HHZ. 2020-08-28T20:09:19.67 0.3 undecidable manual S 310 10.3785 133 -0.02 75
IV.RDP.HHZ. 2020-08-28T20:09:18.95 0.3 undecidable manual S 278 7.5813 143 -0.07 75
IV.LAV9.HNZ. 2020-08-28T20:09:18.25 0.6 undecidable manual P 226 11.7771 130 0.47 46
IV.RCAV.EHZ. 2020-08-28T20:09:18.55 0.3 undecidable manual P 48 15.9729 122 0.08 74
IV.SAMA.EHZ. 2020-08-28T20:09:18.77 0.1 positive manual P 281 17.5713 119 0.03 99
IV.RMP.HHZ. 2020-08-28T20:09:17.73 0.1 negative manual P 310 10.3785 133 0.14 98
IV.RDP.HHZ. 2020-08-28T20:09:17.39 0.1 negative manual P 278 7.5813 143 0.19 97
IV.MA9.HHZ. 2020-08-28T20:09:17.69 0.6 undecidable manual P 280 11.877 130 -0.12 49
IV.VIVA.HHZ. 2020-08-28T20:09:17.97 0.3 undecidable manual S 268 2.5974 166 -0.28 72
IV.VIVA.HHZ. 2020-08-28T20:09:16.85 0.1 negative manual P 268 2.5974 166 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GIUL.HHN. ML:1.5 0.000107311745 1.8336 AML other m 2020-08-28T20:09:32.03
IV.VIVA.HHN. ML:2.9 0.0117284805 0.1664 AML other m 2020-08-28T20:09:18.69
IV.RDP.HHE. ML:2.6 0.006169326 0.3328 AML other m 2020-08-28T20:09:19.69
IV.RDP.HHN. ML:2.6 0.0066295945 0.2176 AML other m 2020-08-28T20:09:19.67
IV.RMP.HHE. ML:2.5 0.0039037845 0.1792 AML other m 2020-08-28T20:09:20.60
IV.RMP.HHN. ML:2.6 0.004682951 1.8464 AML other m 2020-08-28T20:09:20.93
IV.LAV9.HHN. ML:2.4 0.0026962025 0.2304 AML other m 2020-08-28T20:09:21.37
IV.LAV9.HNN. ML:2.4 0.0025991245 0.2048 AML other m 2020-08-28T20:09:21.37
IV.RCAV.EHE. ML:2.1 0.0010934825 0.2816 AML other m 2020-08-28T20:09:21.78
IV.RCAV.EHN. ML:2.1 0.0012594799999999999 0.1536 AML other m 2020-08-28T20:09:22.37
IV.LAV9.HHE. ML:2.4 0.002806056 0.3328 AML other m 2020-08-28T20:09:23.39
IV.LAV9.HNE. ML:2.4 0.00261 0.32 AML other m 2020-08-28T20:09:23.39
IV.GIUL.HHE. ML:1.6 0.00013938199499999998 1.744 AML other m 2020-08-28T20:09:30.02
IV.GUAR.HHN. ML:1.8 0.00017803000000000003 1.68 AML other m 2020-08-28T20:09:30.89
IV.GUAR.HHE. ML:1.8 0.00018545640000000002 0.2688 AML other m 2020-08-28T20:09:32.22
IV.PTQR.HHN. ML:1.6 0.00009515174 0.32 AML other m 2020-08-28T20:09:33.64
IV.PTQR.HHE. ML:1.8 0.00013084555 0.256 AML other m 2020-08-28T20:09:34.20
IV.VVLD.HHN. ML:1.8 0.00009408948 0.3712 AML other m 2020-08-28T20:09:36.86
IV.VVLD.HHE. ML:2.0 0.00016163450000000003 0.2816 AML other m 2020-08-28T20:09:36.76
IV.LRP.EHN. ML:0.0 0.00001880916 1.8464 AML other m 2020-08-28T20:09:36.08
IV.LRP.EHE. ML:0.0 0.000082701365 0.2432 AML other m 2020-08-28T20:09:38.73
IV.TOLF.HHN. ML:1.6 0.00005518351 0.1536 AML other m 2020-08-28T20:09:39.31
IV.POFI.HHE. ML:0.0 0.000038177195 0.4224 AML other m 2020-08-28T20:09:39.51
IV.POFI.HHN. ML:0.0 0.00002959002 0.32 AML other m 2020-08-28T20:09:39.96
IV.TOLF.HHE. ML:1.6 0.000057321769999999995 1.68 AML other m 2020-08-28T20:09:41.86
IV.BARO.EHE. ML:0.0 0.00007165 0.3 AML other m 2020-08-28T20:09:42.33
IV.BARO.EHN. ML:0.0 0.00005305 0.28 AML other m 2020-08-28T20:09:42.78
IV.VVLD.HNE. ML:2.0 0.000166001 0.5504 AML other m 2020-08-28T20:09:36.77
IV.VVLD.HNN. ML:1.8 0.00012034192 0.4736 AML other m 2020-08-28T20:09:38.75
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