Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 26-09-2015 and time 21:54:04 (UTC) in region 2 km SE Lanuvio (RM)

A magnitude ML 2.1 earthquake occured in region: 2 km SE Lanuvio (RM), on

  • 26-09-2015 21:54:04 (UTC)
  • 26-09-2015 23:54:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6650, 12.7240 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
Lanuvio RM 2 13632 13632
Velletri RM 5 53303 66935
Genzano di Roma RM 5 23970 90905
Nemi RM 6 1943 92848
Ariccia RM 8 19407 112255
Albano Laziale RM 9 41715 153970
Aprilia LT 10 73446 227416
Rocca di Papa RM 11 17034 244450
Castel Gandolfo RM 11 8997 253447
Lariano RM 12 13432 266879
Cisterna di Latina LT 12 36868 303747
Marino RM 13 43026 346773
Grottaferrata RM 15 20327 367100
Rocca Priora RM 15 11962 379062
Monte Compatri RM 16 11978 391040
Ardea RM 16 49183 440223
Cori LT 16 11065 451288
Frascati RM 16 22087 473375
Rocca Massima LT 16 1136 474511
Monte Porzio Catone RM 17 8693 483204
Artena RM 18 14276 497480
Pomezia RM 18 62966 560446
Ciampino RM 18 38412 598858
San Cesareo RM 19 15153 614011
Colonna RM 19 4287 618298
Labico RM 19 6379 624677

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km W of Velletri (53303 inhabitants)
10 Km NE of Aprilia (73446 inhabitants)
18 Km E of Pomezia (62966 inhabitants)
25 Km NE of Anzio (54211 inhabitants)
27 Km NW of Latina (125985 inhabitants)
32 Km SE of Roma (2864731 inhabitants)
34 Km S of Tivoli (56533 inhabitants)
37 Km S of Guidonia Montecelio (88673 inhabitants)
42 Km E of Fiumicino (78395 inhabitants)
91 Km SE of Civitavecchia (52991 inhabitants)
95 Km SW of L'Aquila (69753 inhabitants)
98 Km SE of Viterbo (67173 inhabitants)
100 Km S of Terni (111501 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 2015-09-26
21:54:04		 41.6653 12.7242 10 2016-02-19
13:21:47		 Bollettino Sismico Italiano INGV 21626581
Reviewed
Rev100 		ML 2.0 2015-09-26
21:54:04		 41.665 12.7208 10 2015-09-26
22:00:08		 Sala Sismica INGV-Roma 21599241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-09-26 21:54:04 ± 0.1
Latitude 41.6653 ± 0.0045
Longitude 12.7242 ± 0.0108
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 21626581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 872
Semi-minor axis of confidence ellipse (meter) 440
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
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) 169
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) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.02248
Epicentral distance of station farthest from the epicenter (degree) 0.70057
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:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 21626581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-09-29 09:54:36

ML:2.0

Field Value
Value 2.0
Uncertainty 0.4
Num. used stations 7
Type of magnitude ML
Reference to an origin 21599241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-09-26 22:00:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2015-09-26T21:54:28.49 0.3 undecidable manual S 73 77.7666 50 0.24 65
IV.PTQR.HHZ. 2015-09-26T21:54:26.09 0.6 undecidable manual S 54 68.4759 50 0.32 43
IV.GUAR.HHE. 2015-09-26T21:54:21.11 0.3 undecidable manual S 73 50.7159 50 0.06 71
IV.GIUL.HHZ. 2015-09-26T21:54:19.91 0.3 undecidable manual S 105 45.5211 50 0.24 69
IV.CERT.HHZ. 2015-09-26T21:54:17.71 0.3 undecidable manual S 34 38.0286 50 0.07 72
IV.MTCE.HHZ. 2015-09-26T21:54:17.72 0.3 undecidable manual S 2 39.627 50 -0.37 68
IV.PTQR.HHZ. 2015-09-26T21:54:16.75 0.3 undecidable manual P 54 68.4759 50 -0.19 67
IV.LATB.EHE. 2015-09-26T21:54:14.34 0.3 undecidable manual S 134 27.4503 50 -0.48 67
IV.RCAV.EHE. 2015-09-26T21:54:14.61 0.3 undecidable manual S 42 27.2505 50 -0.16 72
IV.GUAR.HHE. 2015-09-26T21:54:14.17 0.1 undecidable manual P 73 50.7159 50 -0.04 95
IV.GIUL.HHZ. 2015-09-26T21:54:13.44 0.1 positive manual P 105 45.5211 50 0.02 96
IV.MTCE.HHZ. 2015-09-26T21:54:12.60 0.1 undecidable manual P 2 39.627 50 0.1 95
IV.CERT.HHZ. 2015-09-26T21:54:12.30 0.1 undecidable manual P 34 38.0286 50 0.05 97
IV.RMP.HHZ. 2015-09-26T21:54:11.40 0.3 undecidable manual S 354 16.2726 122 -0.16 74
IV.LATB.EHE. 2015-09-26T21:54:10.51 0.1 undecidable manual P 134 27.4503 50 -0.11 97
IV.RCAV.EHE. 2015-09-26T21:54:10.63 0.1 undecidable manual P 42 27.2505 50 0.05 99
IV.RMP.HHZ. 2015-09-26T21:54:09.00 0.1 undecidable manual P 354 16.2726 122 0.27 96
IV.VIVA.HHZ. 2015-09-26T21:54:09.45 0.3 undecidable manual S 22 10.1787 135 -0.44 70
IV.RDP.HHZ. 2015-09-26T21:54:09.78 0.3 undecidable manual S 357 10.2786 135 -0.16 74
IV.LAV9.HHZ. 2015-09-26T21:54:08.39 0.3 undecidable manual S 303 2.4975 166 -0.17 75
IV.RDP.HHZ. 2015-09-26T21:54:08.14 0.1 positive manual P 357 10.2786 135 0.34 95
IV.LAV9.HHZ. 2015-09-26T21:54:07.19 0.1 positive manual P 303 2.4975 166 0.19 100
IV.VIVA.HHZ. 2015-09-26T21:54:07.92 0.1 undecidable manual P 22 10.1787 135 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERT.HHE. ML:1.3 0.00007805 1.36 AML other m 2015-09-26T21:54:19.50
IV.CERT.HHN. ML:1.3 0.00007055000000000001 1.4 AML other m 2015-09-26T21:54:19.53
IV.GIUL.HHN. ML:1.3 0.00005875 0.5 AML other m 2015-09-26T21:54:20.44
IV.LAV9.HHN. ML:2.6 0.00683 1.28 AML other m 2015-09-26T21:54:09.06
IV.LAV9.HNN. ML:2.6 0.006515 1.28 AML other m 2015-09-26T21:54:09.07
IV.LAV9.HNE. ML:2.5 0.005555 0.38 AML other m 2015-09-26T21:54:09.99
IV.LAV9.HHE. ML:2.5 0.00613 1.3 AML other m 2015-09-26T21:54:09.80
IV.RDP.HHN. ML:2.5 0.00378 0.28 AML other m 2015-09-26T21:54:10.09
IV.RDP.HHE. ML:2.0 0.00131 0.3 AML other m 2015-09-26T21:54:10.03
IV.RMP.HHE. ML:1.8 0.0005225 0.3 AML other m 2015-09-26T21:54:16.32
IV.RMP.HHN. ML:1.9 0.0007124999999999999 0.32 AML other m 2015-09-26T21:54:11.75
IV.VIVA.HHE. ML:2.1 0.00148 0.38 AML other m 2015-09-26T21:54:13.26
IV.VIVA.HHN. ML:2.2 0.001935 1.44 AML other m 2015-09-26T21:54:09.77
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