Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 28-08-2020 and time 22:00:31 (UTC) in region 3 km NW Lariano (RM)

A magnitude ML 2.1 earthquake occured in region: 3 km NW Lariano (RM), on

  • 28-08-2020 22:00:31 (UTC)
  • 29-08-2020 00:00:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7490, 12.8050 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 3 13432 13432
Rocca Priora RM 6 11962 25394
Velletri RM 7 53303 78697
Nemi RM 8 1943 80640
Labico RM 8 6379 87019
Rocca di Papa RM 8 17034 104053
San Cesareo RM 8 15153 119206
Monte Compatri RM 9 11978 131184
Artena RM 9 14276 145460
Valmontone RM 10 15959 161419
Genzano di Roma RM 10 23970 185389
Monte Porzio Catone RM 10 8693 194082
Zagarolo RM 10 17843 211925
Colonna RM 11 4287 216212
Lanuvio RM 11 13632 229844
Ariccia RM 12 19407 249251
Frascati RM 12 22087 271338
Grottaferrata RM 12 20327 291665
Albano Laziale RM 12 41715 333380
Marino RM 12 43026 376406
Rocca Massima LT 12 1136 377542
Palestrina RM 12 21672 399214
Castel Gandolfo RM 13 8997 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
Colleferro RM 17 21595 465807
Poli RM 17 2418 468225
Cisterna di Latina LT 17 36868 505093
Capranica Prenestina RM 18 351 505444
Ciampino RM 18 38412 543856
Casape RM 19 744 544600
Segni RM 19 9159 553759
San Gregorio da Sassola RM 20 1619 555378

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km NE of Velletri (53303 inhabitants)
22 Km NE of Aprilia (73446 inhabitants)
24 Km S of Tivoli (56533 inhabitants)
27 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)
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 2.1 2020-08-28
22:00:31		 41.7492 12.8047 10 2020-11-19
12:37:04		 Bollettino Sismico Italiano INGV 83847881
Reviewed
Rev100 		ML 2.1 2020-08-28
22:00:31		 41.7538 12.7965 11 2020-08-28
22:11:35		 Sala Sismica INGV-Roma 82419741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-28 22:00:31 ± 0.06
Latitude 41.7492 ± 0.0045
Longitude 12.8047 ± 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 83847881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 487
Semi-minor axis of confidence ellipse (meter) 429
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 357
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 35
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.91821
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 34
Type of magnitude ML
Reference to an origin 83847881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-17 11:30:09

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 82419741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-28 22:11:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HHZ. 2020-08-28T22:01:29.10 3.0 undecidable manual Sg 3.71 0
IV.FRON.EHZ. 2020-08-28T22:01:00.55 3.0 undecidable manual Pn -0.24 0
IV.VVLD.HHZ. 2020-08-28T22:00:53.33 3.0 undecidable manual S 79 68.9754 50 0.44 0
IV.PTQR.HHZ. 2020-08-28T22:00:50.45 0.6 undecidable manual S 58 57.7977 50 0.56 44
IV.CERA.HHZ. 2020-08-28T22:00:49.04 0.6 undecidable manual P 99 101.9202 50 0 24
IV.ARRO.EHZ. 2020-08-28T22:00:47.76 0.6 undecidable manual P 358 92.1411 50 0.23 30
IV.MCI.EHZ. 2020-08-28T22:00:47.03 0.6 undecidable manual P 109 88.4448 50 0.08 34
IV.INTR.HHZ. 2020-08-28T22:00:47.69 0.6 undecidable manual P 72 95.4378 50 -0.34 27
IV.GIUL.HHZ. 2020-08-28T22:00:46.18 0.3 undecidable manual S 119 42.9237 50 0.26 72
IV.GUAR.HHZ. 2020-08-28T22:00:45.65 0.3 undecidable manual S 83 42.3243 50 -0.12 74
IV.TOLF.HHZ. 2020-08-28T22:00:45.20 0.6 undecidable manual P 298 75.0693 50 0.31 40
IV.SRES.HHN. 2020-08-28T22:00:43.05 1.0 undecidable manual P 336 59.2962 50 0.58 22
IV.VVLD.HHZ. 2020-08-28T22:00:43.71 0.1 undecidable manual P 79 68.9754 50 -0.25 88
IV.FIAM.HHZ. 2020-08-28T22:00:42.82 0.3 undecidable manual P 24 63.0924 50 -0.22 69
IV.MTCE.HHZ. 2020-08-28T22:00:42.45 0.3 undecidable manual S 350 30.747 50 -0.24 72
IV.LATB.EHZ. 2020-08-28T22:00:42.55 0.3 undecidable manual S 155 31.2465 50 -0.25 72
IV.PTQR.HHZ. 2020-08-28T22:00:42.16 0.1 undecidable manual P 58 57.7977 50 -0.07 98
IT.RMMM.HGE. 2020-08-28T22:00:39.74 0.6 undecidable manual P 304 34.9428 50 1.04 36
IV.GUAR.HHZ. 2020-08-28T22:00:39.66 0.3 undecidable manual P 83 42.3243 50 -0.19 73
IV.GIUL.HHZ. 2020-08-28T22:00:39.87 0.1 undecidable manual P 119 42.9237 50 -0.07 100
IV.RCAV.EHZ. 2020-08-28T22:00:38.50 0.3 undecidable manual S 47 15.9729 122 0.23 72
IV.SAMA.EHZ. 2020-08-28T22:00:38.31 0.3 undecidable manual S 281 17.871 119 -0.55 67
IT.RMVT.HGN. 2020-08-28T22:00:38.80 0.6 undecidable manual P 311 34.9428 50 0.09 50
IV.LATB.EHZ. 2020-08-28T22:00:37.90 0.1 undecidable manual P 155 31.2465 50 -0.24 96
IV.ROM9.HNE. 2020-08-28T22:00:37.50 0.6 undecidable manual P 290 25.4523 111 0.27 48
IV.LAV9.HNZ. 2020-08-28T22:00:37.26 0.3 undecidable manual S 228 11.7771 130 0.15 74
IV.MTCE.HHZ. 2020-08-28T22:00:37.83 0.3 undecidable manual P 350 30.747 50 -0.24 72
IV.RDP.HHZ. 2020-08-28T22:00:36.01 0.3 undecidable manual S 279 7.881 141 -0.15 74
IV.RMP.HHZ. 2020-08-28T22:00:36.67 0.3 undecidable manual S 310 10.7781 133 -0.17 73
IV.MA9.HHZ. 2020-08-28T22:00:36.84 0.6 undecidable manual S 281 12.2766 129 -0.38 47
IV.LAV9.HNZ. 2020-08-28T22:00:35.50 0.3 undecidable manual P 228 11.7771 130 0.65 64
IV.RCAV.EHZ. 2020-08-28T22:00:35.59 0.1 undecidable manual P 47 15.9729 122 0.08 100
IV.SAMA.EHZ. 2020-08-28T22:00:35.76 0.1 undecidable manual P 281 17.871 119 -0.1 99
IV.MA9.HHZ. 2020-08-28T22:00:35.41 0.3 undecidable manual P 281 12.2766 129 0.49 68
IV.RDP.HHZ. 2020-08-28T22:00:34.48 0.1 undecidable manual P 279 7.881 141 0.18 98
IV.RMP.HHZ. 2020-08-28T22:00:34.78 0.1 undecidable manual P 310 10.7781 133 0.09 99
IV.VIVA.HHZ. 2020-08-28T22:00:34.90 0.3 undecidable manual S 272 2.8971 164 -0.44 69
IV.VIVA.HHZ. 2020-08-28T22:00:33.88 0.1 negative manual P 272 2.8971 164 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FIAM.HHE. ML:1.5 0.00005942652 1.4624 AML other m 2020-08-28T22:01:03.13
IV.VIVA.HHE. ML:3.3 0.03651132 0.1408 AML other m 2020-08-28T22:00:35.08
IV.RDP.HHN. ML:3.0 0.01584985 0.192 AML other m 2020-08-28T22:00:36.73
IV.RDP.HHE. ML:2.8 0.0093209843 0.1408 AML other m 2020-08-28T22:00:36.74
IV.RMP.HHE. ML:2.9 0.0104280355 0.1536 AML other m 2020-08-28T22:00:37.22
IV.RCAV.EHE. ML:2.4 0.002351028 0.2304 AML other m 2020-08-28T22:00:38.87
IV.RCAV.EHN. ML:2.5 0.002614947 0.1792 AML other m 2020-08-28T22:00:39.44
IV.RMP.HHN. ML:2.9 0.016039565 1.552 AML other m 2020-08-28T22:00:40.10
IV.LATB.EHN. ML:1.0 0.000049237405 0.1408 AML other m 2020-08-28T22:00:43.16
IV.LATB.EHE. ML:1.2 0.000065691385 0.2176 AML other m 2020-08-28T22:00:45.20
IV.MTCE.HHN. ML:1.7 0.00022111365 0.384 AML other m 2020-08-28T22:00:46.74
IV.GUAR.HHN. ML:2.1 0.00042492720000000003 1.744 AML other m 2020-08-28T22:00:46.95
IV.GIUL.HHE. ML:2.2 0.0004765948 0.3584 AML other m 2020-08-28T22:00:47.10
IV.MTCE.HHE. ML:1.5 0.0001837608 0.384 AML other m 2020-08-28T22:00:47.16
IV.GIUL.HHN. ML:2.1 0.00037781835 0.1664 AML other m 2020-08-28T22:00:47.25
IV.GUAR.HHE. ML:2.2 0.0004709152 0.256 AML other m 2020-08-28T22:00:49.30
IV.PTQR.HHE. ML:2.2 0.00032997995000000005 0.3968 AML other m 2020-08-28T22:00:51.25
IV.PTQR.HHN. ML:2.1 0.00026612885000000004 0.2304 AML other m 2020-08-28T22:00:51.25
IV.VVLD.HHE. ML:2.3 0.00034000189999999997 1.6032 AML other m 2020-08-28T22:00:54.82
IV.VVLD.HNE. ML:2.2 0.000287146 1.6288 AML other m 2020-08-28T22:00:54.03
IV.VVLD.HHN. ML:2.1 0.00022120659999999998 0.3328 AML other m 2020-08-28T22:00:55.28
IV.VVLD.HNN. ML:2.1 0.00021442596000000003 0.3328 AML other m 2020-08-28T22:00:55.45
IV.TOLF.HHE. ML:1.9 0.00011671781 0.256 AML other m 2020-08-28T22:00:55.72
IV.FIAM.HHN. ML:1.5 0.00006505643 0.512 AML other m 2020-08-28T22:00:58.51
IV.TOLF.HHN. ML:1.9 0.00012002336499999999 0.2304 AML other m 2020-08-28T22:00:59.68
IV.MCI.EHE. ML:2.3 0.00022210455 0.2432 AML other m 2020-08-28T22:01:02.36
IV.MCI.EHN. ML:2.1 0.0001640228 0.2176 AML other m 2020-08-28T22:01:03.32
IV.ARRO.EHE. ML:1.7 0.000058216985 0.192 AML other m 2020-08-28T22:01:04.29
IV.ARRO.EHN. ML:1.8 0.000069003075 0.1664 AML other m 2020-08-28T22:01:04.82
IV.INTR.HHN. ML:2.0 0.000092817645 1.6544 AML other m 2020-08-28T22:01:05.08
IV.INTR.HHE. ML:2.0 0.00009390796000000001 0.4608 AML other m 2020-08-28T22:01:07.55
IV.CERA.HHN. ML:1.8 0.00006052269 0.4096 AML other m 2020-08-28T22:01:08.39
IV.CERA.HHE. ML:1.8 0.0000636253 1.5136 AML other m 2020-08-28T22:01:11.16
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
Waveforms Seismic signals in miniseed + resp format Download