Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 23-10-2018 and time 05:15:55 (UTC) in region 7 km NW Accumoli (RI)

A magnitude ML 2.0 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 23-10-2018 05:15:55 (UTC)
  • 23-10-2018 07:15:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7460, 13.1870 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
Accumoli RI 8 667 667
Norcia PG 9 4957 5624
Arquata del Tronto AP 10 1178 6802
Cittareale RI 14 482 7284
Cascia PG 15 3217 10501
Amatrice RI 15 2657 13158
Montegallo AP 16 523 13681
Castelsantangelo sul Nera MC 17 281 13962
Acquasanta Terme AP 18 2916 16878
Preci PG 19 724 17602

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
49 Km E of Terni (111501 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Chieti (51815 inhabitants)
93 Km NE of Tivoli (56533 inhabitants)
96 Km E 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 2.0 2018-10-23
05:15:55		 42.7458 13.1873 10 2019-06-04
09:16:01		 Bollettino Sismico Italiano INGV 63299891
Reviewed
Rev100 		ML 2.2 2018-10-23
05:15:55		 42.7482 13.184 10 2018-10-23
05:31:21		 Sala Sismica INGV-Roma 62234811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-10-23 05:15:55 ± 0.04
Latitude 42.7458 ± 0.0027
Longitude 13.1873 ± 0.0037
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 63299891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 313
Semi-minor axis of confidence ellipse (meter) 139
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 43
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) 0.67449
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 63299891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-12-04 14:15:41

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 62234811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-10-23 05:31:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2018-10-23T05:16:16.51 3.0 undecidable manual P 0
IV.FIAM.HHZ. 2018-10-23T05:16:13.00 0.6 undecidable manual S 186 53.3022 50 0.23 45
IV.COR1.EHZ. 2018-10-23T05:16:13.26 3.0 negative manual P -0.26 0
IV.MOMA.HHZ. 2018-10-23T05:16:12.52 0.3 undecidable manual S 278 50.7159 50 0.46 64
IV.CESX.HHZ. 2018-10-23T05:16:12.41 0.6 undecidable manual S 253 51.3153 50 0.18 45
IV.GIGS.HHZ. 2018-10-23T05:16:10.28 0.6 undecidable manual S 136 45.2214 50 -0.32 44
IV.MML1.HNE. 2018-10-23T05:16:10.67 0.3 undecidable manual S 337 44.4222 50 0.29 67
IV.GUMA.HNN. 2018-10-23T05:16:09.15 0.3 undecidable manual S 19 37.1295 50 0.7 60
IV.T0110.HHZ. 2018-10-23T05:16:09.21 0.3 undecidable manual P 140 74.8695 50 0.26 64
IV.TERO.HHZ. 2018-10-23T05:16:08.02 0.6 undecidable manual S 112 36.6411 50 -0.28 45
IV.CESI.HHZ. 2018-10-23T05:16:08.23 0.6 undecidable manual S 321 36.8298 50 -0.12 47
IV.MF5.EHZ. 2018-10-23T05:16:08.55 0.3 undecidable manual S 39 34.743 50 0.73 60
IV.FDMO.HHZ. 2018-10-23T05:16:07.06 0.6 undecidable manual S 346 33.2445 50 -0.35 45
IV.EL6.EHZ. 2018-10-23T05:16:07.52 0.6 undecidable manual P 354 65.0904 50 0.07 45
IV.CAMP.HHZ. 2018-10-23T05:16:06.23 0.6 undecidable manual S 142 29.5482 50 -0.18 47
IV.CESX.HHZ. 2018-10-23T05:16:05.23 0.6 undecidable manual P 253 51.3153 50 -0.09 46
IV.MOMA.HHZ. 2018-10-23T05:16:05.18 0.1 undecidable manual P 278 50.7159 50 -0.05 93
IV.FIAM.HHZ. 2018-10-23T05:16:05.52 0.3 undecidable manual P 186 53.3022 50 -0.12 68
IV.RM33.EHZ. 2018-10-23T05:16:05.47 0.6 undecidable manual S 175 26.3514 50 -0.1 48
IV.GIGS.HHZ. 2018-10-23T05:16:04.01 0.1 undecidable manual P 136 45.2214 50 -0.38 88
IV.MML1.HNE. 2018-10-23T05:16:04.12 0.1 undecidable manual P 337 44.4222 50 -0.14 92
IV.MMO1.EHZ. 2018-10-23T05:16:03.58 0.6 undecidable manual S 34 20.4684 117 -0.26 47
IV.PF6.EHN. 2018-10-23T05:16:03.87 0.3 undecidable manual P 1 43.5231 50 -0.25 68
IV.LNSS.HHZ. 2018-10-23T05:16:03.75 0.3 undecidable manual S 217 19.869 117 0.08 73
IV.ARRO.EHZ. 2018-10-23T05:16:03.30 0.3 undecidable manual P 242 39.0276 50 -0.14 70
IV.SMA1.EHZ. 2018-10-23T05:16:03.11 0.6 undecidable manual S 137 17.5713 120 0.14 48
IV.MC2.EHZ. 2018-10-23T05:16:03.26 0.6 undecidable manual S 0 18.3705 119 0.06 49
IV.GUMA.HNN. 2018-10-23T05:16:03.24 0.1 positive manual P 19 37.1295 50 0.1 94
IV.MF5.EHZ. 2018-10-23T05:16:02.97 0.1 undecidable manual P 39 34.743 50 0.19 93
IV.MTRA.HNZ. 2018-10-23T05:16:02.73 0.6 undecidable manual S 86 17.0718 121 -0.09 49
IV.FDMO.HHZ. 2018-10-23T05:16:02.25 0.1 negative manual P 346 33.2445 50 -0.29 91
IV.TERO.HHZ. 2018-10-23T05:16:02.82 0.1 undecidable manual P 112 36.6411 50 -0.24 92
IV.T1299.HNN. 2018-10-23T05:16:02.48 0.3 undecidable manual S 148 14.5743 125 0.38 69
IV.CESI.HHZ. 2018-10-23T05:16:02.89 0.1 positive manual P 321 36.8298 50 -0.2 93
IV.CAMP.HHZ. 2018-10-23T05:16:01.87 0.1 positive manual P 142 29.5482 50 -0.1 96
IV.FEMA.HNE. 2018-10-23T05:16:01.56 0.6 undecidable manual P 335 26.4513 50 0.06 48
IV.RM33.EHZ. 2018-10-23T05:16:01.40 0.1 undecidable manual P 175 26.3514 50 -0.08 97
IV.NRCA.HNZ. 2018-10-23T05:16:00.81 0.6 undecidable manual S 329 11.3775 132 -0.42 46
IV.MC2.EHZ. 2018-10-23T05:16:00.14 0.1 negative manual P 0 18.3705 119 0.03 99
IV.MMO1.EHZ. 2018-10-23T05:16:00.33 0.1 positive manual P 34 20.4684 117 -0.16 96
IV.LNSS.HHZ. 2018-10-23T05:16:00.49 0.1 positive manual P 217 19.869 117 0.11 97
IV.SMA1.EHZ. 2018-10-23T05:16:00.12 0.1 positive manual P 137 17.5713 120 0.14 97
IV.T1299.HNN. 2018-10-23T05:15:59.83 0.3 undecidable manual P 148 14.5743 125 0.35 70
IV.MTRA.HNZ. 2018-10-23T05:15:59.86 0.1 undecidable manual P 86 17.0718 121 -0.03 99
IV.NRCA.HNZ. 2018-10-23T05:15:58.94 0.1 undecidable manual P 329 11.3775 132 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:2.2 0.0014432125 0.1408 AML other m 2018-10-23T05:16:04.46
IV.SMA1.EHE. ML:2.3 0.0016489795 0.1408 AML other m 2018-10-23T05:16:04.67
IV.RM33.HNN. ML:2.0 0.0005391314499999999 0.2624 AML other m 2018-10-23T05:16:06.23
IV.RM33.EHN. ML:2.0 0.00055375135 0.2624 AML other m 2018-10-23T05:16:06.23
IV.RM33.HNE. ML:2.1 0.0007373142500000001 0.1504 AML other m 2018-10-23T05:16:06.38
IV.RM33.EHE. ML:2.1 0.0007164431 0.16 AML other m 2018-10-23T05:16:06.38
IV.CAMP.HHN. ML:1.9 0.00035490745 0.2016 AML other m 2018-10-23T05:16:06.36
IV.CAMP.HHE. ML:2.2 0.00087861155 0.2016 AML other m 2018-10-23T05:16:06.41
IV.FDMO.HHN. ML:1.9 0.000312171 0.2208 AML other m 2018-10-23T05:16:07.67
IV.TERO.HNN. ML:2.1 0.00047833574999999996 0.08 AML other m 2018-10-23T05:16:08.48
IV.TERO.HHN. ML:2.4 0.00097357195 0.08 AML other m 2018-10-23T05:16:08.48
IV.TERO.HHE. ML:2.1 0.0004593377 0.08 AML other m 2018-10-23T05:16:08.44
IV.FDMO.HHE. ML:1.8 0.00024702185 0.32 AML other m 2018-10-23T05:16:08.68
IV.CESI.HHE. ML:2.0 0.00043226580000000004 0.3008 AML other m 2018-10-23T05:16:08.70
IV.CESI.HHN. ML:2.4 0.00100150065 0.32 AML other m 2018-10-23T05:16:08.88
IV.TERO.HNE. ML:1.8 0.00021769440000000002 0.1088 AML other m 2018-10-23T05:16:09.07
IV.MF5.EHN. ML:1.9 0.00035691099999999996 0.3008 AML other m 2018-10-23T05:16:09.35
IV.MF5.EHE. ML:2.1 0.0005456185000000001 0.2784 AML other m 2018-10-23T05:16:09.25
IV.ARRO.EHE. ML:1.9 0.00027208235000000005 0.2592 AML other m 2018-10-23T05:16:10.45
IV.ARRO.EHN. ML:2.0 0.00033904690000000006 0.16 AML other m 2018-10-23T05:16:11.06
IV.MOMA.HNE. ML:2.2 0.00038950209999999994 0.1504 AML other m 2018-10-23T05:16:14.56
IV.MOMA.HHE. ML:2.2 0.00041966255 0.1408 AML other m 2018-10-23T05:16:14.56
IV.FIAM.HHE. ML:1.7 0.0001207669 0.4 AML other m 2018-10-23T05:16:14.90
IV.MOMA.HNN. ML:2.2 0.00038073125 0.2176 AML other m 2018-10-23T05:16:14.93
IV.CESX.HHE. ML:1.8 0.00014929759999999996 0.2784 AML other m 2018-10-23T05:16:14.95
IV.MOMA.HHN. ML:2.1 0.0002986671 0.1792 AML other m 2018-10-23T05:16:15.17
IV.CESX.HHN. ML:2.0 0.00023032809999999997 0.2976 AML other m 2018-10-23T05:16:15.32
IV.FIAM.HHN. ML:1.6 0.000102184065 0.16 AML other m 2018-10-23T05:16:15.38
IV.EL6.EHN. ML:1.8 0.000130179165 0.2208 AML other m 2018-10-23T05:16:20.33
IV.EL6.EHE. ML:1.9 0.00014118058 0.48 AML other m 2018-10-23T05:16:20.57
IV.T0110.HHN. ML:2.1 0.00017616285 0.32 AML other m 2018-10-23T05:16:22.54
IV.T0110.HHE. ML:2.0 0.00015322035 0.5376 AML other m 2018-10-23T05:16:26.57
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