Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 27-08-2018 and time 02:21:46 (Italy) in region 3 km N Cittaducale (RI)

A magnitude ML 2.1 earthquake occured in region: 3 km N Cittaducale (RI), on

  • 27-08-2018 00:21:46 (UTC)
  • 27-08-2018 02:21:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4110, 12.9510 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Cittaducale RI 3 6828 6828
Castel Sant'Angelo RI 7 1308 8136
Rieti RI 7 47698 55834
Cantalice RI 8 2755 58589
Borgo Velino RI 9 972 59561
Micigliano RI 10 127 59688
Concerviano RI 10 291 59979
Antrodoco RI 11 2588 62567
Belmonte in Sabina RI 11 636 63203
Poggio Bustone RI 12 2055 65258
Rivodutri RI 14 1253 66511
Contigliano RI 15 3783 70294
Rocca Sinibalda RI 15 815 71109
Longone Sabino RI 15 597 71706
Greccio RI 16 1558 73264
Petrella Salto RI 16 1197 74461
Morro Reatino RI 16 373 74834
Monte San Giovanni in Sabina RI 17 714 75548
Leonessa RI 17 2435 77983
Colli sul Velino RI 17 533 78516
Posta RI 17 694 79210
Torricella in Sabina RI 18 1342 80552
Labro RI 18 374 80926
Montenero Sabino RI 18 299 81225
Borbona RI 19 617 81842
Poggio San Lorenzo RI 19 589 82431
Varco Sabino RI 20 187 82618

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SE of Terni (111501 inhabitants)
37 Km W of L'Aquila (69753 inhabitants)
49 Km NE of Guidonia Montecelio (88673 inhabitants)
51 Km N of Tivoli (56533 inhabitants)
64 Km SE of Foligno (57155 inhabitants)
68 Km W of Teramo (54892 inhabitants)
69 Km NE of Roma (2864731 inhabitants)
69 Km E of Viterbo (67173 inhabitants)
82 Km N of Velletri (53303 inhabitants)
90 Km SE of Perugia (166134 inhabitants)
90 Km NE of Pomezia (62966 inhabitants)
92 Km NE of Fiumicino (78395 inhabitants)
94 Km N of Aprilia (73446 inhabitants)
99 Km W of Montesilvano (53738 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
Reviewed
Rev100 		ML 2.1 2018-08-27
00:21:46		 42.4107 12.9508 8 2018-08-27
00:28:41		 Sala Sismica INGV-Roma 60247341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-27 00:21:46 ± 0.12
Latitude 42.4107 ± 0.0054
Longitude 12.9508 ± 0.0073
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 60247341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 723
Semi-minor axis of confidence ellipse (meter) 172
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 232
Circular confidence region, given by single value of horizontal uncertainty (meter) 720.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 182
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 24
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.68708
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 14
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 34
Type of magnitude ML
Reference to an origin 60247341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-27 00:28:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2018-08-27T00:22:08.07 0.6 undecidable manual S 9 70.2741 50 0.08 46
IV.MC2.EHZ. 2018-08-27T00:22:05.64 0.6 undecidable manual S 19 58.7967 50 0.71 39
IV.FOSV.EHZ. 2018-08-27T00:22:03.23 3.0 negative manual P -0.22 0
IV.NRCA.HHZ. 2018-08-27T00:22:02.22 0.6 undecidable manual S 16 48.8178 50 -0.02 48
IV.ATCC.EHZ. 2018-08-27T00:22:02.18 3.0 positive manual P 0.09 0
IV.INTR.HHZ. 2018-08-27T00:22:01.31 3.0 negative manual P -0.55 0
IV.CAMP.HHZ. 2018-08-27T00:22:00.09 0.3 undecidable manual S 70 39.9267 50 0.19 71
IV.SMA1.EHZ. 2018-08-27T00:22:00.53 0.6 undecidable manual S 52 39.8268 50 0.69 41
IV.MF5.EHZ. 2018-08-27T00:21:59.90 1.0 negative manual P 33 76.2681 50 0.23 22
IV.FDMO.HHZ. 2018-08-27T00:21:58.55 1.0 negative manual P 9 70.2741 50 -0.19 22
IV.CESI.HHZ. 2018-08-27T00:21:58.10 0.3 positive manual P 357 65.9895 50 0.02 70
OB.GAVE.EHZ. 2018-08-27T00:21:57.39 0.6 undecidable manual S 352 31.5462 104 -0.03 50
IV.MMO1.EHZ. 2018-08-27T00:21:57.27 1.0 positive manual P 29 62.2932 50 -0.24 22
IV.PTQR.HHZ. 2018-08-27T00:21:56.14 3.0 undecidable manual P -0.34 0
IV.MC2.EHZ. 2018-08-27T00:21:56.78 0.6 undecidable manual P 19 58.7967 50 -0.2 46
IV.ARRO.EHZ. 2018-08-27T00:21:55.11 0.3 undecidable manual S 321 24.0537 109 0.19 73
IV.GIGS.HHZ. 2018-08-27T00:21:55.70 1.0 undecidable manual P 85 51.1155 50 -0.09 24
IV.NRCA.HHZ. 2018-08-27T00:21:55.04 0.1 undecidable manual P 16 48.8178 50 -0.38 89
IV.MTCE.HHZ. 2018-08-27T00:21:55.65 3.0 negative manual P 0.42 0
IV.FIAM.HHZ. 2018-08-27T00:21:54.28 0.6 undecidable manual S 139 20.868 111 0.39 47
IV.LNSS.HHZ. 2018-08-27T00:21:54.55 0.6 undecidable manual S 19 22.5552 110 0.13 49
IV.RM33.EHZ. 2018-08-27T00:21:54.87 0.6 undecidable manual S 63 24.1536 109 -0.09 50
IV.CAMP.HHZ. 2018-08-27T00:21:53.57 0.3 negative manual P 70 39.9267 50 -0.5 66
IV.SMA1.EHZ. 2018-08-27T00:21:53.72 0.6 undecidable manual P 52 39.8268 50 -0.32 46
OB.GAVE.EHZ. 2018-08-27T00:21:52.58 0.1 negative manual P 352 31.5462 104 -0.06 98
IV.RM33.EHZ. 2018-08-27T00:21:51.10 0.1 negative manual P 63 24.1536 109 -0.12 99
IV.ARRO.EHZ. 2018-08-27T00:21:51.50 0.6 positive manual P 321 24.0537 109 0.3 47
IV.LNSS.HHZ. 2018-08-27T00:21:50.79 0.1 undecidable manual P 19 22.5552 110 -0.12 99
IV.FIAM.HHZ. 2018-08-27T00:21:50.68 0.1 negative manual P 139 20.868 111 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:2.6 0.00304 1.46 AML other m 2018-08-27T00:21:55.84
IV.LNSS.HHN. ML:2.4 0.00172 0.44 AML other m 2018-08-27T00:21:56.24
IV.RM33.HNE. ML:2.4 0.0015 1.06 AML other m 2018-08-27T00:21:56.78
IV.ARRO.EHE. ML:2.2 0.00108 1.2 AML other m 2018-08-27T00:21:57.32
OB.GAVE.EHE. ML:2.4 0.0010750000000000002 0.26 AML other m 2018-08-27T00:21:57.81
OB.GAVE.HNE. ML:2.4 0.00113 0.42 AML other m 2018-08-27T00:21:57.48
IV.RM33.EHN. ML:2.3 0.00124 0.72 AML other m 2018-08-27T00:21:57.35
IV.FIAM.HHE. ML:2.2 0.0012250000000000002 1.24 AML other m 2018-08-27T00:21:57.95
IV.ARRO.EHN. ML:2.1 0.00079 0.58 AML other m 2018-08-27T00:21:59.69
IV.RM33.EHE. ML:2.3 0.0013700000000000001 1.02 AML other m 2018-08-27T00:21:59.94
OB.GAVE.EHN. ML:2.5 0.001465 0.24 AML other m 2018-08-27T00:22:00.48
OB.GAVE.HNN. ML:2.0 0.00045799999999999997 0.9 AML other m 2018-08-27T00:22:01.59
IV.FIAM.HHN. ML:2.3 0.0013900000000000002 0.74 AML other m 2018-08-27T00:22:02.49
IV.CAMP.HHN. ML:2.0 0.000365 0.98 AML other m 2018-08-27T00:22:02.35
IV.NRCA.HHE. ML:2.2 0.00039 0.14 AML other m 2018-08-27T00:22:03.26
IV.RM33.HNN. ML:2.3 0.001265 1.22 AML other m 2018-08-27T00:22:03.38
IV.SMA1.EHE. ML:2.3 0.0007055 0.84 AML other m 2018-08-27T00:22:03.82
IV.NRCA.HHN. ML:2.0 0.00030500000000000004 0.82 AML other m 2018-08-27T00:22:04.92
IV.SMA1.EHN. ML:2.2 0.0005755000000000001 0.9 AML other m 2018-08-27T00:22:06.02
IV.PTQR.HHN. ML:1.6 0.0000887 0.84 AML other m 2018-08-27T00:22:07.65
IV.MTCE.HHE. ML:1.9 0.0002185 1.1 AML other m 2018-08-27T00:22:07.29
IV.MTCE.HHN. ML:1.9 0.000211 1 AML other m 2018-08-27T00:22:08.03
IV.CAMP.HHE. ML:1.7 0.0001905 1.14 AML other m 2018-08-27T00:22:08.57
IV.GIGS.HHE. ML:1.6 0.00009495 0.92 AML other m 2018-08-27T00:22:08.93
IV.GIGS.HHN. ML:1.5 0.0000831 1.12 AML other m 2018-08-27T00:22:09.00
IV.CESI.HHE. ML:2.1 0.00023649999999999998 1.12 AML other m 2018-08-27T00:22:10.70
IV.CESI.HHN. ML:2.2 0.00031 0.24 AML other m 2018-08-27T00:22:11.30
IV.FDMO.HHE. ML:2.1 0.000188 0.8 AML other m 2018-08-27T00:22:12.65
IV.PTQR.HHE. ML:1.7 0.0001061 0.92 AML other m 2018-08-27T00:22:14.62
IV.ATCC.EHN. ML:2.3 0.0002195 0.4 AML other m 2018-08-27T00:22:19.04
IV.ATCC.EHE. ML:2.3 0.0002455 0.34 AML other m 2018-08-27T00:22:20.14
IV.FDMO.HHN. ML:1.9 0.0001365 0.62 AML other m 2018-08-27T00:22:20.42
IV.FOSV.EHN. ML:1.9 0.00008365 0.82 AML other m 2018-08-27T00:22:23.54
IV.FOSV.EHE. ML:1.9 0.00008605 1.58 AML other m 2018-08-27T00:22:30.01
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