Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 27-06-2021 and time 03:59:19 (Italy) in region 4 km W Albano Laziale (RM)

A magnitude ML 1.8 earthquake occured in region: 4 km W Albano Laziale (RM), on

  • 27-06-2021 01:59:19 (UTC)
  • 27-06-2021 03:59:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7210, 12.6170 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
Albano Laziale RM 4 41715 41715
Castel Gandolfo RM 4 8997 50712
Ariccia RM 5 19407 70119
Genzano di Roma RM 6 23970 94089
Marino RM 7 43026 137115
Nemi RM 8 1943 139058
Lanuvio RM 9 13632 152690
Grottaferrata RM 9 20327 173017
Rocca di Papa RM 9 17034 190051
Ciampino RM 9 38412 228463
Frascati RM 11 22087 250550
Pomezia RM 11 62966 313516
Monte Porzio Catone RM 14 8693 322209
Ardea RM 14 49183 371392
Velletri RM 14 53303 424695
Monte Compatri RM 14 11978 436673
Aprilia LT 14 73446 510119
Rocca Priora RM 15 11962 522081
Colonna RM 17 4287 526368
Lariano RM 18 13432 539800
San Cesareo RM 19 15153 554953

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km NE of Pomezia (62966 inhabitants)
14 Km W of Velletri (53303 inhabitants)
14 Km N of Aprilia (73446 inhabitants)
22 Km SE of Roma (2864731 inhabitants)
30 Km N of Anzio (54211 inhabitants)
31 Km SW of Tivoli (56533 inhabitants)
32 Km E of Fiumicino (78395 inhabitants)
33 Km S of Guidonia Montecelio (88673 inhabitants)
37 Km NW of Latina (125985 inhabitants)
80 Km SE of Civitavecchia (52991 inhabitants)
88 Km SE of Viterbo (67173 inhabitants)
94 Km S of Terni (111501 inhabitants)
95 Km SW of L'Aquila (69753 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 1.8 2021-06-27
01:59:19		 41.7207 12.6172 11 2021-12-29
11:12:29		 Bollettino Sismico Italiano INGV 95268971
Reviewed
Rev100 		ML 1.7 2021-06-27
01:59:19		 41.7142 12.6088 11 2021-06-27
02:05:56		 Sala Sismica INGV-Roma 91945831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-27 01:59:19 ± 0.14
Latitude 41.7207 ± 0.0063
Longitude 12.6172 ± 0.0096
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95268971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 868
Semi-minor axis of confidence ellipse (meter) 619
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 226
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 197
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.67449
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 91945831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-27 02:05:56

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 95268971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-10 14:35:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHZ. 2021-06-27T01:59:37.18 1.0 undecidable manual S 109 55.7997 90 -0.14 22
IV.BARO.HNZ. 2021-06-27T01:59:33.61 0.6 undecidable manual P 322 74.8695 90 0.7 38
IV.FIAM.HNN. 2021-06-27T01:59:32.38 0.3 undecidable manual P 34 73.371 90 -0.31 62
IV.CERT.HHZ. 2021-06-27T01:59:32.87 0.3 undecidable manual S 50 39.3273 91 -0.06 69
IV.GIUL.HHZ. 2021-06-27T01:59:29.68 0.6 undecidable manual P 109 55.7997 90 -0.31 43
IV.CERT.HHZ. 2021-06-27T01:59:27.49 0.1 undecidable manual P 50 39.3273 91 0.04 95
IV.VIVA.HHZ. 2021-06-27T01:59:26.03 0.6 undecidable manual S 75 13.0758 107 0.09 49
IV.RMP.HHZ. 2021-06-27T01:59:26.04 0.3 undecidable manual S 36 12.4764 110 0.26 71
IV.MTCE.HHZ. 2021-06-27T01:59:26.39 0.1 undecidable manual P 17 35.0427 91 -0.4 87
IV.RDP.HHZ. 2021-06-27T01:59:25.01 0.6 undecidable manual S 60 8.88 128 0.06 49
IV.MA9.HHZ. 2021-06-27T01:59:24.18 0.3 undecidable manual S 33 6.4935 141 -0.3 72
IV.SAMA.EHZ. 2021-06-27T01:59:24.36 0.1 undecidable manual S 343 6.993 138 -0.21 98
IV.LAV9.HHZ. 2021-06-27T01:59:24.75 0.6 undecidable manual S 125 8.2806 131 -0.07 50
IV.VIVA.HHZ. 2021-06-27T01:59:23.60 0.1 undecidable manual P 75 13.0758 107 0.19 96
IV.RMP.HHZ. 2021-06-27T01:59:23.57 0.1 undecidable manual P 36 12.4764 110 0.25 95
IV.LAV9.HHZ. 2021-06-27T01:59:22.76 0.1 undecidable manual P 125 8.2806 131 -0.01 100
IV.RDP.HHZ. 2021-06-27T01:59:22.97 0.1 undecidable manual P 60 8.88 128 0.13 98
IV.MA9.HHZ. 2021-06-27T01:59:22.68 0.1 undecidable manual P 33 6.4935 141 0.11 98
IV.SAMA.EHZ. 2021-06-27T01:59:22.69 0.1 undecidable manual P 343 6.993 138 0.07 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LAV9.HNN. ML:2.0 0.00116 0.26 AML other m 2021-06-27T01:59:24.81
IV.LAV9.HHN. ML:2.0 0.00125 0.26 AML other m 2021-06-27T01:59:24.81
IV.RMP.HHE. ML:2.2 0.0014550000000000001 0.22 AML other m 2021-06-27T01:59:26.27
IV.RMP.HHN. ML:2.1 0.001324442 0.1792 AML other m 2021-06-27T01:59:26.84
IV.RDP.HHE. ML:1.1 0.00015993409999999998 0.32 AML other m 2021-06-27T01:59:27.32
IV.VIVA.HHE. ML:1.6 0.0003825719 1.7792 AML other m 2021-06-27T01:59:27.03
IV.VIVA.HHN. ML:1.7 0.00046800000000000005 1.74 AML other m 2021-06-27T01:59:28.12
IV.RDP.HHN. ML:1.4 0.00029600000000000004 0.28 AML other m 2021-06-27T01:59:29.40
IV.LAV9.HNE. ML:1.9 0.0009519999999999999 0.28 AML other m 2021-06-27T01:59:29.58
IV.LAV9.HHE. ML:1.8 0.000911 0.28 AML other m 2021-06-27T01:59:29.44
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