Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 27-05-2021 and time 02:00:11 (Italy) in region 3 km SE Rocca di Mezzo (AQ)

A magnitude ML 1.6 earthquake occured in region: 3 km SE Rocca di Mezzo (AQ), on

  • 27-05-2021 00:00:11 (UTC)
  • 27-05-2021 02:00:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.1880, 13.5310 at 14 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
Rocca di Mezzo AQ 3 1526 1526
Ovindoli AQ 6 1227 2753
Rocca di Cambio AQ 7 533 3286
Fontecchio AQ 8 369 3655
Fagnano Alto AQ 8 418 4073
Tione degli Abruzzi AQ 9 310 4383
Villa Sant'Angelo AQ 9 424 4807
Sant'Eusanio Forconese AQ 11 394 5201
Celano AQ 11 11017 16218
San Demetrio ne' Vestini AQ 12 1854 18072
Ocre AQ 12 1167 19239
Prata d'Ansidonia AQ 12 496 19735
Fossa AQ 12 721 20456
Secinaro AQ 13 359 20815
Aielli AQ 13 1475 22290
Caporciano AQ 14 230 22520
Massa d'Albe AQ 14 1476 23996
Cerchio AQ 15 1635 25631
Poggio Picenze AQ 15 1136 26767
San Pio delle Camere AQ 15 661 27428
Acciano AQ 16 327 27755
Gagliano Aterno AQ 16 254 28009
Collarmele AQ 16 894 28903
Barisciano AQ 16 1828 30731
Magliano de' Marsi AQ 17 3690 34421
Navelli AQ 17 554 34975
Molina Aterno AQ 18 386 35361
Castelvecchio Subequo AQ 18 982 36343
Carapelle Calvisio AQ 18 87 36430
Castelvecchio Calvisio AQ 19 153 36583
Castel di Ieri AQ 19 303 36886
Avezzano AQ 19 42515 79401
Lucoli AQ 20 1011 80412
Santo Stefano di Sessanio AQ 20 111 80523
San Benedetto in Perillis AQ 20 113 80636

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SE of L'Aquila (69753 inhabitants)
54 Km S of Teramo (54892 inhabitants)
56 Km W of Chieti (51815 inhabitants)
63 Km SW of Montesilvano (53738 inhabitants)
64 Km W of Pescara (121014 inhabitants)
65 Km E of Tivoli (56533 inhabitants)
70 Km E of Guidonia Montecelio (88673 inhabitants)
84 Km NE of Velletri (53303 inhabitants)
84 Km SE of Terni (111501 inhabitants)
92 Km E of Roma (2864731 inhabitants)
95 Km NE of Latina (125985 inhabitants)
98 Km NE of Aprilia (73446 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 1.6 2021-05-27
00:00:11		 42.1878 13.5307 14 2021-12-29
11:12:03		 Bollettino Sismico Italiano INGV 90893261
Reviewed
Rev100 		ML 1.5 2021-05-27
00:00:11		 42.1892 13.5213 14 2021-05-27
00:07:16		 Sala Sismica INGV-Roma 90520511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-27 00:00:11 ± 0.08
Latitude 42.1878 ± 0.0045
Longitude 13.5307 ± 0.0073
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90893261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 567
Semi-minor axis of confidence ellipse (meter) 186
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.08723
Epicentral distance of station farthest from the epicenter (degree) 0.76622
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 90520511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-27 00:07:16

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 90893261
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-31 00:22:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2021-05-27T00:00:27.17 0.6 undecidable manual S 324 44.0226 95 1.12 34
IV.MMO1.EHN. 2021-05-27T00:00:26.09 0.6 undecidable manual P 348 80.6637 92 0.43 41
IV.MIDA.HNZ. 2021-05-27T00:00:26.06 0.6 undecidable manual P 135 85.0482 92 -0.28 42
IV.NRCA.HHZ. 2021-05-27T00:00:25.27 0.6 undecidable manual P 335 79.2651 92 -0.18 43
IV.GIUL.HHZ. 2021-05-27T00:00:25.08 0.6 undecidable manual P 198 73.4709 93 0.53 40
IV.VCEL.EHZ. 2021-05-27T00:00:24.32 0.3 undecidable manual S 48 34.2435 97 0.87 58
IV.FIAM.HHZ. 2021-05-27T00:00:23.33 0.6 undecidable manual S 285 35.1426 97 -0.35 45
IV.VVLD.HHZ. 2021-05-27T00:00:23.84 0.6 undecidable manual S 168 36.1416 97 -0.1 48
IV.INTR.HHZ. 2021-05-27T00:00:23.91 0.6 undecidable manual S 122 36.4413 97 -0.13 48
IV.RCAV.EHZ. 2021-05-27T00:00:23.58 0.6 undecidable manual P 232 61.2942 93 0.9 35
IT.SULP.HGN. 2021-05-27T00:00:23.78 0.6 undecidable manual S 109 34.5432 97 0.25 46
IV.LRP.EHZ. 2021-05-27T00:00:23.00 0.6 undecidable manual P 176 60.1953 93 0.49 41
IV.GUAR.HNN. 2021-05-27T00:00:21.25 0.6 undecidable manual P 202 47.2194 95 0.74 39
IV.GIGS.HJZ. 2021-05-27T00:00:21.80 0.6 undecidable manual S 7 29.6481 99 -0.43 44
IV.T1299.HNN. 2021-05-27T00:00:21.36 0.6 undecidable manual P 338 53.502 94 -0.12 46
IV.LPEL.HHZ. 2021-05-27T00:00:21.40 0.3 undecidable manual P 106 55.8996 94 -0.45 64
IV.CERT.HHZ. 2021-05-27T00:00:20.97 0.3 undecidable manual P 240 52.4031 94 -0.34 66
IV.RM33.EHZ. 2021-05-27T00:00:20.62 0.6 undecidable manual P 324 44.0226 95 0.59 42
IV.TERO.HHZ. 2021-05-27T00:00:20.36 0.3 undecidable manual P 7 48.618 94 -0.37 65
IV.SMA1.EHZ. 2021-05-27T00:00:20.90 0.6 undecidable manual P 342 51.6039 94 -0.29 44
MN.AQU.HNZ. 2021-05-27T00:00:19.84 0.6 undecidable manual S 331 21.1677 107 -0.17 47
IV.T0110.HHZ. 2021-05-27T00:00:19.99 0.6 undecidable manual S 77 20.6682 108 0.08 50
IV.PTQR.HHZ. 2021-05-27T00:00:19.90 0.6 undecidable manual S 210 21.2676 107 -0.16 49
IV.VCEL.EHZ. 2021-05-27T00:00:18.75 0.3 undecidable manual P 48 34.2435 97 0.22 70
IT.SULP.HGN. 2021-05-27T00:00:18.44 0.6 undecidable manual P 109 34.5432 97 -0.14 47
IV.FIAM.HHZ. 2021-05-27T00:00:18.34 0.3 undecidable manual P 285 35.1426 97 -0.32 68
IV.VVLD.HHZ. 2021-05-27T00:00:18.64 0.3 undecidable manual P 168 36.1416 97 -0.17 71
IV.INTR.HHZ. 2021-05-27T00:00:18.73 0.3 undecidable manual P 122 36.4413 97 -0.14 71
IV.GIGS.HJZ. 2021-05-27T00:00:17.45 0.6 undecidable manual P 7 29.6481 99 -0.37 45
IV.FAGN.HHZ. 2021-05-27T00:00:17.59 0.6 undecidable manual S 27 9.6792 136 0.21 50
MN.AQU.HNZ. 2021-05-27T00:00:16.30 0.3 undecidable manual P 331 21.1677 107 -0.24 71
IV.T0110.HHZ. 2021-05-27T00:00:16.49 0.3 undecidable manual P 77 20.6682 108 0.01 75
IV.PTQR.HHZ. 2021-05-27T00:00:16.55 0.3 undecidable manual P 210 21.2676 107 -0.02 75
IV.FAGN.HHZ. 2021-05-27T00:00:14.99 0.1 negative manual P 27 9.6792 136 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FAGN.HHN. ML:2.1 0.00140811095 0.2176 AML other m 2021-05-27T00:00:17.95
IV.FAGN.HHE. ML:2.1 0.0012608669000000001 0.1664 AML other m 2021-05-27T00:00:18.52
IV.T0110.HHE. ML:2.0 0.00069587305 0.2688 AML other m 2021-05-27T00:00:20.17
IV.T0110.HHN. ML:2.2 0.0010105 0.34 AML other m 2021-05-27T00:00:20.18
IV.PTQR.HHE. ML:1.6 0.00022730895 0.1792 AML other m 2021-05-27T00:00:21.46
IV.PTQR.HHN. ML:1.4 0.00016999999999999999 0.18 AML other m 2021-05-27T00:00:21.88
IV.FIAM.HHN. ML:1.1 0.000052090965000000004 0.2176 AML other m 2021-05-27T00:00:23.96
IV.VCEL.EHE. ML:2.3 0.0008089999999999999 0.1 AML other m 2021-05-27T00:00:24.77
IV.VCEL.EHN. ML:2.1 0.000496 0.1 AML other m 2021-05-27T00:00:24.78
IV.INTR.HHN. ML:1.6 0.00013450000000000002 1.86 AML other m 2021-05-27T00:00:25.06
IV.INTR.HHE. ML:1.5 0.0001258099 0.2048 AML other m 2021-05-27T00:00:25.06
IV.CERT.HHN. ML:1.2 0.0000369 0.88 AML other m 2021-05-27T00:00:29.88
IV.TERO.HHN. ML:1.3 0.000056618565000000005 0.1024 AML other m 2021-05-27T00:00:29.99
IV.RM33.EHN. ML:1.4 0.000081275335 0.3584 AML other m 2021-05-27T00:00:30.47
IV.RM33.EHE. ML:1.5 0.00010155 0.46 AML other m 2021-05-27T00:00:30.88
IV.SMA1.EHN. ML:1.4 0.000063261985 0.4992 AML other m 2021-05-27T00:00:31.74
IV.CERT.HHE. ML:1.1 0.000029949999999999996 0.34 AML other m 2021-05-27T00:00:32.58
IV.SMA1.EHE. ML:1.4 0.000058150000000000004 0.42 AML other m 2021-05-27T00:00:34.34
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