Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 18-06-2021 and time 04:30:58 (Italy) in region 4 km SW Cerchio (AQ)

A magnitude ML 1.8 earthquake occured in region: 4 km SW Cerchio (AQ), on

  • 18-06-2021 02:30:58 (UTC)
  • 18-06-2021 04:30:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.0350, 13.5800 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
Cerchio AQ 4 1635 1635
San Benedetto dei Marsi AQ 5 3909 5544
Collarmele AQ 5 894 6438
Aielli AQ 5 1475 7913
Celano AQ 6 11017 18930
Pescina AQ 7 4133 23063
Trasacco AQ 9 6246 29309
Ortucchio AQ 10 1860 31169
Luco dei Marsi AQ 12 6079 37248
Ovindoli AQ 12 1227 38475
Avezzano AQ 13 42515 80990
Gioia dei Marsi AQ 13 1989 82979
Ortona dei Marsi AQ 13 542 83521
Gagliano Aterno AQ 14 254 83775
Lecce nei Marsi AQ 14 1702 85477
Secinaro AQ 16 359 85836
Castel di Ieri AQ 16 303 86139
Cocullo AQ 16 230 86369
Collelongo AQ 16 1233 87602
Castelvecchio Subequo AQ 17 982 88584
Goriano Sicoli AQ 17 569 89153
Canistro AQ 17 995 90148
Capistrello AQ 17 5252 95400
Massa d'Albe AQ 18 1476 96876
Molina Aterno AQ 18 386 97262
Civitella Roveto AQ 18 3268 100530
Civita d'Antino AQ 19 979 101509
Magliano de' Marsi AQ 19 3690 105199
Villavallelonga AQ 19 919 106118
Anversa degli Abruzzi AQ 19 341 106459
Bisegna AQ 19 223 106682
Tione degli Abruzzi AQ 20 310 106992
Acciano AQ 20 327 107319
Scurcola Marsicana AQ 20 2824 110143
Rocca di Mezzo AQ 20 1526 111669

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of L'Aquila (69753 inhabitants)
60 Km SW of Chieti (51815 inhabitants)
65 Km E of Tivoli (56533 inhabitants)
70 Km S of Teramo (54892 inhabitants)
71 Km E of Guidonia Montecelio (88673 inhabitants)
71 Km SW of Pescara (121014 inhabitants)
71 Km SW of Montesilvano (53738 inhabitants)
77 Km NE of Velletri (53303 inhabitants)
84 Km NE of Latina (125985 inhabitants)
91 Km NE of Aprilia (73446 inhabitants)
92 Km E of Roma (2864731 inhabitants)
97 Km SE of Terni (111501 inhabitants)
98 Km E of Pomezia (62966 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 2021-06-18
02:30:58		 42.0348 13.5797 10 2021-12-29
11:12:09		 Bollettino Sismico Italiano INGV 92310261
Reviewed
Rev100 		ML 1.9 2021-06-18
02:30:58		 42.0305 13.5862 11 2021-06-18
02:36:47		 Sala Sismica INGV-Roma 91474731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-18 02:30:58 ± 0.07
Latitude 42.0348 ± 0.0036
Longitude 13.5797 ± 0.0048
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 92310261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 365
Semi-minor axis of confidence ellipse (meter) 70
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 244
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.62233
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 29
Type of magnitude ML
Reference to an origin 92310261
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-25 16:16:41

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 91474731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-18 02:36:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.OT13.EHZ. 2021-06-18T02:31:36.39 3.0 negative manual Pg 6.45 0
IV.CERA.HHZ. 2021-06-18T02:31:17.86 0.6 undecidable manual S 143 60.495 50 0.08 47
IV.CERT.HHZ. 2021-06-18T02:31:15.42 0.6 undecidable manual S 259 50.2164 50 0.4 45
IV.LPEL.HHZ. 2021-06-18T02:31:15.82 0.6 undecidable manual S 88 49.7169 50 0.92 37
IV.VCEL.EHZ. 2021-06-18T02:31:14.66 0.6 undecidable manual S 28 45.3213 50 0.94 37
IV.FIAM.HNN. 2021-06-18T02:31:13.94 0.3 undecidable manual S 304 46.0206 50 0.04 73
IV.LRP.EHN. 2021-06-18T02:31:13.55 0.6 undecidable manual S 179 43.0236 50 0.45 45
IT.CSO1.HGZ. 2021-06-18T02:31:13.31 0.3 undecidable manual S 280 41.1255 50 0.7 62
IV.GIGS.HHN. 2021-06-18T02:31:13.96 0.3 undecidable manual S 359 46.4202 50 -0.05 72
MN.AQU.HNN. 2021-06-18T02:31:12.05 0.6 undecidable manual S 338 38.2284 50 0.23 47
IT.OPI.HGE. 2021-06-18T02:31:11.18 0.6 undecidable manual S 144 35.3424 50 0.12 49
IV.GUAR.HHZ. 2021-06-18T02:31:11.15 0.6 undecidable manual S 220 34.6431 50 0.29 47
IV.POFI.HHZ. 2021-06-18T02:31:11.14 0.6 undecidable manual S 163 36.8298 50 -0.32 46
IT.SULP.HGZ. 2021-06-18T02:31:10.09 0.6 undecidable manual S 79 29.1486 50 0.68 42
IV.SMA1.EHZ. 2021-06-18T02:31:10.78 0.3 undecidable manual P 343 69.0753 50 -0.33 66
IT.SULC.HNZ. 2021-06-18T02:31:09.21 0.3 undecidable manual S 82 27.3504 50 0.28 72
IV.TERO.HHZ. 2021-06-18T02:31:09.98 0.3 undecidable manual P 2 65.2902 50 -0.54 63
IV.T0110.HHZ. 2021-06-18T02:31:09.32 0.6 undecidable manual S 37 26.9508 50 0.49 46
IV.RM33.EHZ. 2021-06-18T02:31:09.37 0.1 undecidable manual P 330 60.495 50 -0.43 87
IV.CERA.HHZ. 2021-06-18T02:31:09.36 0.1 undecidable manual P 143 60.495 50 -0.43 87
IT.SULA.HNZ. 2021-06-18T02:31:09.61 0.6 undecidable manual S 81 28.0497 50 0.49 46
IV.GIUL.HHZ. 2021-06-18T02:31:09.57 0.1 positive manual P 207 59.2962 50 -0.03 95
IV.MCI.EHZ. 2021-06-18T02:31:09.99 0.3 undecidable manual P 162 63.2922 50 -0.23 68
IV.LPEL.HHZ. 2021-06-18T02:31:08.07 0.1 undecidable manual P 88 49.7169 50 -0.06 96
IV.INTR.HHZ. 2021-06-18T02:31:08.71 0.6 undecidable manual S 95 26.9508 50 -0.09 50
IV.CERT.HHZ. 2021-06-18T02:31:08.23 0.3 undecidable manual P 259 50.2164 50 0.03 72
IV.FAGN.HHZ. 2021-06-18T02:31:08.71 0.6 undecidable manual S 1 25.6521 111 0.31 47
IV.GIGS.HHN. 2021-06-18T02:31:07.23 0.1 positive manual P 359 46.4202 50 -0.39 90
IV.VCEL.EHZ. 2021-06-18T02:31:07.53 0.1 positive manual P 28 45.3213 50 0.08 96
IV.FIAM.HNN. 2021-06-18T02:31:07.21 0.3 undecidable manual P 304 46.0206 50 -0.34 68
IV.VVLD.HHZ. 2021-06-18T02:31:06.24 0.6 undecidable manual S 169 18.6702 118 0.05 51
IV.LRP.EHN. 2021-06-18T02:31:06.70 0.1 positive manual P 179 43.0236 50 -0.39 91
IT.CSO1.HGZ. 2021-06-18T02:31:06.80 0.3 undecidable manual P 280 41.1255 50 0 74
IV.PTQR.HHZ. 2021-06-18T02:31:05.69 0.6 undecidable manual S 265 14.7741 123 0.65 44
MN.AQU.HNN. 2021-06-18T02:31:05.91 0.1 positive manual P 338 38.2284 50 -0.44 90
IV.POFI.HHZ. 2021-06-18T02:31:05.82 0.1 positive manual P 163 36.8298 50 -0.32 93
IT.OPI.HGE. 2021-06-18T02:31:05.80 0.1 undecidable manual P 144 35.3424 50 -0.11 97
IV.GUAR.HHZ. 2021-06-18T02:31:05.82 0.1 undecidable manual P 220 34.6431 50 0.02 99
IV.INTR.HHZ. 2021-06-18T02:31:04.53 0.1 undecidable manual P 95 26.9508 50 -0.08 100
IT.SULP.HGZ. 2021-06-18T02:31:04.96 0.3 undecidable manual P 79 29.1486 50 0 76
IT.SULC.HNZ. 2021-06-18T02:31:04.65 0.3 undecidable manual P 82 27.3504 50 -0.03 75
IV.T0110.HHZ. 2021-06-18T02:31:04.52 0.1 positive manual P 37 26.9508 50 -0.1 99
IT.SULA.HNZ. 2021-06-18T02:31:04.84 0.1 undecidable manual P 81 28.0497 50 0.05 100
IV.FAGN.HHZ. 2021-06-18T02:31:04.10 0.1 undecidable manual P 1 25.6521 111 -0.28 96
IV.VVLD.HHZ. 2021-06-18T02:31:03.30 0.1 positive manual P 169 18.6702 118 0.2 98
IV.PTQR.HHZ. 2021-06-18T02:31:02.87 0.1 negative manual P 265 14.7741 123 0.43 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHE. ML:1.7 0.00046800000000000005 0.18 AML other m 2021-06-18T02:31:06.26
IV.PTQR.HHN. ML:1.8 0.00062 0.42 AML other m 2021-06-18T02:31:06.26
IV.VVLD.HNE. ML:2.1 0.0010950000000000003 0.22 AML other m 2021-06-18T02:31:06.42
IV.VVLD.HHE. ML:2.2 0.0011549999999999998 0.24 AML other m 2021-06-18T02:31:06.41
IV.VVLD.HHN. ML:1.9 0.000615379 0.2 AML other m 2021-06-18T02:31:06.54
IV.VVLD.HNN. ML:1.8 0.0005684824 0.2 AML other m 2021-06-18T02:31:06.55
IV.FAGN.HHN. ML:2.1 0.00072727925 0.2992 AML other m 2021-06-18T02:31:09.22
IV.INTR.HHE. ML:2.0 0.0005335000000000001 1.52 AML other m 2021-06-18T02:31:09.87
IV.INTR.HNE. ML:2.0 0.0005124999999999999 1.52 AML other m 2021-06-18T02:31:09.87
IV.FAGN.HHE. ML:1.9 0.00053167695 0.1792 AML other m 2021-06-18T02:31:09.17
IV.INTR.HNN. ML:2.1 0.0006815 0.38 AML other m 2021-06-18T02:31:09.24
IV.INTR.HHN. ML:2.1 0.000653 0.38 AML other m 2021-06-18T02:31:09.24
IV.T0110.HHN. ML:2.5 0.0017516125000000002 0.36 AML other m 2021-06-18T02:31:09.73
IV.T0110.HHE. ML:2.6 0.002187995 0.2992 AML other m 2021-06-18T02:31:09.71
IV.POFI.HNN. ML:1.6 0.00014832634999999999 0.3904 AML other m 2021-06-18T02:31:11.29
IV.POFI.HHN. ML:1.4 0.00009052955 0.3408 AML other m 2021-06-18T02:31:11.30
IV.GUAR.HHE. ML:1.9 0.00035665355 0.1792 AML other m 2021-06-18T02:31:11.35
IV.POFI.HHE. ML:1.5 0.00013210105 0.2992 AML other m 2021-06-18T02:31:11.53
IV.POFI.HNE. ML:1.6 0.0001598042 0.3296 AML other m 2021-06-18T02:31:11.53
IV.GUAR.HHN. ML:2.0 0.000364 0.26 AML other m 2021-06-18T02:31:11.72
IV.VCEL.EHN. ML:1.8 0.00016826179999999998 0.24 AML other m 2021-06-18T02:31:14.76
IV.VCEL.EHE. ML:2.2 0.0004987008 0.3008 AML other m 2021-06-18T02:31:15.64
IV.CERT.HHN. ML:1.2 0.000045901399999999994 0.76 AML other m 2021-06-18T02:31:16.17
IV.LPEL.HHN. ML:1.6 0.0001079051 0.1808 AML other m 2021-06-18T02:31:16.18
IV.LPEL.HHE. ML:1.5 0.00008014872 0.2992 AML other m 2021-06-18T02:31:16.05
IV.GIUL.HHE. ML:1.3 0.000037759130000000005 0.84 AML other m 2021-06-18T02:31:18.53
IV.CERA.HHE. ML:1.5 0.000063060355 0.1984 AML other m 2021-06-18T02:31:18.64
IV.CERA.HHN. ML:1.7 0.000105878095 0.24 AML other m 2021-06-18T02:31:18.71
IV.CERA.HNN. ML:1.7 0.00010527811000000001 0.24 AML other m 2021-06-18T02:31:18.84
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