Earthquake with magnitude of ML 1.8 on date 12-01-2021 and time 21:35:58 (Italy) in region 3 km SW Albano Laziale (RM)

A magnitude ML 1.8 earthquake occured in region: 3 km SW Albano Laziale (RM), on

  • 12-01-2021 20:35:58 (UTC)
  • 12-01-2021 21:35:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7070, 12.6360 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.

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 3 41715 41715
Ariccia RM 3 19407 61122
Castel Gandolfo RM 5 8997 70119
Genzano di Roma RM 5 23970 94089
Lanuvio RM 6 13632 107721
Nemi RM 7 1943 109664
Marino RM 7 43026 152690
Rocca di Papa RM 9 17034 169724
Grottaferrata RM 10 20327 190051
Ciampino RM 11 38412 228463
Frascati RM 12 22087 250550
Pomezia RM 12 62966 313516
Velletri RM 12 53303 366819
Aprilia LT 13 73446 440265
Ardea RM 13 49183 489448
Monte Porzio Catone RM 14 8693 498141
Monte Compatri RM 14 11978 510119
Rocca Priora RM 14 11962 522081
Lariano RM 17 13432 535513
Colonna RM 17 4287 539800
San Cesareo RM 19 15153 554953

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km E of Pomezia (62966 inhabitants)
12 Km W of Velletri (53303 inhabitants)
13 Km N of Aprilia (73446 inhabitants)
24 Km SE of Roma (2864731 inhabitants)
29 Km N of Anzio (54211 inhabitants)
32 Km SW of Tivoli (56533 inhabitants)
34 Km S of Guidonia Montecelio (88673 inhabitants)
34 Km E of Fiumicino (78395 inhabitants)
35 Km NW of Latina (125985 inhabitants)
82 Km SE of Civitavecchia (52991 inhabitants)
90 Km SE of Viterbo (67173 inhabitants)
95 Km S of Terni (111501 inhabitants)
96 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 2021-01-12
20:35:58
41.7072 12.6362 11 2021-07-12
16:55:09
Bollettino Sismico Italiano INGV 89722921
Reviewed
Rev100
ML 1.8 2021-01-12
20:35:59
41.7153 12.66 11 2021-01-12
20:44:29
Sala Sismica INGV-Roma 86209601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-12 20:35:58 ± 0.12
Latitude 41.7072 ± 0.0054
Longitude 12.6362 ± 0.0084
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 89722921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 774
Semi-minor axis of confidence ellipse (meter) 520
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 205
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.05576
Epicentral distance of station farthest from the epicenter (degree) 0.32466
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:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 89722921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-24 14:41:13

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 86209601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-12 20:44:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTCE.HHE. 2021-01-12T20:36:11.41 0.3 undecidable manual S 14 36.0417 50 0.3 68
IV.RCAV.EHE. 2021-01-12T20:36:09.29 0.3 undecidable manual S 59 29.9478 50 -0.17 71
IV.LATB.EHZ. 2021-01-12T20:36:05.67 0.3 undecidable manual P 131 35.9418 50 -0.26 69
IV.MTCE.HHE. 2021-01-12T20:36:05.88 0.3 undecidable manual P 14 36.0417 50 -0.07 71
IV.RMP.HHZ. 2021-01-12T20:36:04.56 0.3 undecidable manual S 26 12.9759 129 -0.14 73
IV.RCAV.EHE. 2021-01-12T20:36:04.87 0.3 undecidable manual P 59 29.9478 50 -0.13 71
IV.VIVA.HHZ. 2021-01-12T20:36:04.54 0.6 undecidable manual S 67 12.0768 131 0.06 50
IV.RDP.HHZ. 2021-01-12T20:36:03.48 0.6 undecidable manual S 46 8.4804 141 -0.14 49
IV.SAMA.EHZ. 2021-01-12T20:36:03.53 0.6 undecidable manual S 336 8.88 140 -0.17 49
IV.LAV9.HHE. 2021-01-12T20:36:03.11 0.3 undecidable manual S 122 6.1938 150 -0.04 76
IV.MA9.HHZ. 2021-01-12T20:36:02.91 0.6 undecidable manual S 15 7.1928 146 -0.44 46
IV.RMP.HHZ. 2021-01-12T20:36:02.40 0.1 undecidable manual P 26 12.9759 129 0.14 98
IV.VIVA.HHZ. 2021-01-12T20:36:02.53 0.6 undecidable manual P 67 12.0768 131 0.41 46
IV.RDP.HHZ. 2021-01-12T20:36:01.87 0.1 undecidable manual P 46 8.4804 141 0.24 96
IV.LAV9.HHE. 2021-01-12T20:36:01.52 0.3 undecidable manual P 122 6.1938 150 0.17 74
IV.MA9.HHZ. 2021-01-12T20:36:01.54 0.1 undecidable manual P 15 7.1928 146 0.07 100
IV.SAMA.EHZ. 2021-01-12T20:36:01.59 0.3 undecidable manual P 336 8.88 140 -0.08 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RDP.HHE. ML:1.5 0.00042054464999999997 0.3968 AML other m 2021-01-12T20:36:03.81
IV.RDP.HHN. ML:1.9 0.0010204214 0.3584 AML other m 2021-01-12T20:36:03.81
IV.RMP.HHN. ML:1.9 0.0008487137499999999 0.1152 AML other m 2021-01-12T20:36:04.80
IV.RMP.HHE. ML:1.6 0.0004631617 0.128 AML other m 2021-01-12T20:36:05.27
IV.VIVA.HHN. ML:1.7 0.0006074922999999999 0.2816 AML other m 2021-01-12T20:36:06.77
IV.VIVA.HHE. ML:2.1 0.0012498735 0.3072 AML other m 2021-01-12T20:36:07.17
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