Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 22-09-2021 and time 00:02:41 (UTC) in region 4 km SE Massa d'Albe (AQ)

A magnitude ML 1.5 earthquake occured in region: 4 km SE Massa d'Albe (AQ), on

  • 22-09-2021 00:02:41 (UTC)
  • 22-09-2021 02:02:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.0810, 13.4140 at 11 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
Massa d'Albe AQ 4 1476 1476
Magliano de' Marsi AQ 4 3690 5166
Avezzano AQ 6 42515 47681
Scurcola Marsicana AQ 6 2824 50505
Ovindoli AQ 10 1227 51732
Celano AQ 11 11017 62749
Castellafiume AQ 12 1106 63855
Capistrello AQ 13 5252 69107
Tagliacozzo AQ 13 6889 75996
Cappadocia AQ 14 528 76524
Luco dei Marsi AQ 14 6079 82603
Aielli AQ 15 1475 84078
Canistro AQ 15 995 85073
Cerchio AQ 16 1635 86708
Rocca di Mezzo AQ 17 1526 88234
Trasacco AQ 17 6246 94480
Sante Marie AQ 18 1166 95646
Collarmele AQ 18 894 96540
Civitella Roveto AQ 18 3268 99808
Rocca di Cambio AQ 19 533 100341
San Benedetto dei Marsi AQ 19 3909 104250
Borgorose RI 20 4591 108841

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km S of L'Aquila (69753 inhabitants)
52 Km E of Tivoli (56533 inhabitants)
57 Km E of Guidonia Montecelio (88673 inhabitants)
69 Km NE of Velletri (53303 inhabitants)
69 Km SW of Teramo (54892 inhabitants)
69 Km W of Chieti (51815 inhabitants)
77 Km SW of Montesilvano (53738 inhabitants)
79 Km SW of Pescara (121014 inhabitants)
80 Km E of Roma (2864731 inhabitants)
80 Km NE of Latina (125985 inhabitants)
83 Km SE of Terni (111501 inhabitants)
83 Km NE of Aprilia (73446 inhabitants)
88 Km NE of Pomezia (62966 inhabitants)
96 Km NE of Anzio (54211 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 1.5 2021-09-22
00:02:41		 42.081 13.4143 11 2022-03-30
13:04:11		 Bollettino Sismico Italiano INGV 96479811
Reviewed
Rev100 		ML 1.5 2021-09-22
00:02:41		 42.0862 13.4097 11 2021-09-22
00:10:36		 Sala Sismica INGV-Roma 95717291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 00:02:41 ± 0.08
Latitude 42.0810 ± 0.0036
Longitude 13.4143 ± 0.0048
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96479811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 414
Semi-minor axis of confidence ellipse (meter) 242
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 102
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
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) 0.06025
Epicentral distance of station farthest from the epicenter (degree) 0.45416
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 96479811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-12 18:38:23

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95717291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 00:10:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LRP.EHN. 2021-09-22T00:02:57.72 0.6 undecidable manual S 163 50.2164 50 0.24 46
IV.POFI.HNE. 2021-09-22T00:02:56.86 0.6 undecidable manual S 149 47.2194 50 0.17 46
IV.CERT.HHZ. 2021-09-22T00:02:54.27 0.6 undecidable manual S 248 38.5281 50 -0.1 48
IV.T0110.HHZ. 2021-09-22T00:02:53.49 0.6 undecidable manual S 61 34.0437 50 0.32 46
IV.FIAM.HHZ. 2021-09-22T00:02:52.98 0.6 undecidable manual S 310 32.0457 50 0.34 46
MN.AQU.HNN. 2021-09-22T00:02:52.02 0.3 undecidable manual S 359 30.3474 50 -0.15 72
IV.VVLD.HHZ. 2021-09-22T00:02:52.15 0.6 undecidable manual S 144 29.0487 50 0.3 47
IV.GUAR.HNE. 2021-09-22T00:02:52.56 0.6 undecidable manual S 195 32.8449 50 -0.3 46
IT.CSO1.HGZ. 2021-09-22T00:02:51.73 0.6 undecidable manual S 275 26.9508 50 0.45 45
IV.RM33.EHZ. 2021-09-22T00:02:51.17 0.3 undecidable manual P 341 50.2164 50 0.43 66
IV.FAGN.HHZ. 2021-09-22T00:02:50.50 0.3 undecidable manual S 34 24.753 50 -0.2 72
IV.CAMP.HHN. 2021-09-22T00:02:50.54 0.3 undecidable manual P 359 50.4162 50 -0.24 68
IT.SULP.HGN. 2021-09-22T00:02:50.02 0.1 undecidable manual P 89 42.2244 50 0.51 87
IV.RCAV.EHE. 2021-09-22T00:02:50.16 0.6 undecidable manual P 236 46.62 50 -0.02 48
IV.LRP.EHN. 2021-09-22T00:02:50.59 0.1 undecidable manual P 163 50.2164 50 -0.15 93
IV.INTR.HHZ. 2021-09-22T00:02:49.30 0.3 undecidable manual P 101 41.1255 50 -0.04 72
IV.GIGS.HHZ. 2021-09-22T00:02:49.50 1.0 undecidable manual P 17 43.3233 50 -0.17 23
IV.POFI.HNE. 2021-09-22T00:02:49.85 0.1 undecidable manual P 149 47.2194 50 -0.43 88
IV.CERT.HHZ. 2021-09-22T00:02:48.87 0.1 undecidable manual P 248 38.5281 50 -0.07 96
IV.T0110.HHZ. 2021-09-22T00:02:48.39 0.6 undecidable manual P 61 34.0437 50 0.14 48
IV.VVLD.HHZ. 2021-09-22T00:02:47.44 1.0 undecidable manual P 144 29.0487 50 -0.05 25
IV.GUAR.HNE. 2021-09-22T00:02:47.73 0.6 undecidable manual P 195 32.8449 50 -0.34 46
IT.CSO1.HGZ. 2021-09-22T00:02:47.29 0.1 undecidable manual P 275 26.9508 50 0.13 97
IV.FIAM.HHZ. 2021-09-22T00:02:47.67 1.0 undecidable manual P 310 32.0457 50 -0.27 23
MN.AQU.HNN. 2021-09-22T00:02:47.40 0.3 undecidable manual P 359 30.3474 50 -0.27 70
IV.FAGN.HHZ. 2021-09-22T00:02:46.62 0.1 negative manual P 34 24.753 50 -0.2 96
IV.PTQR.HHZ. 2021-09-22T00:02:45.83 0.3 undecidable manual S 190 6.6933 148 -0.04 77
IV.PTQR.HHZ. 2021-09-22T00:02:44.19 0.1 positive manual P 190 6.6933 148 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHN. ML:1.9 0.0012032845000000002 0.22 AML other m 2021-09-22T00:02:46.02
IV.PTQR.HHE. ML:2.0 0.0014100000000000002 1.86 AML other m 2021-09-22T00:02:45.03
IV.FAGN.HHN. ML:1.7 0.000305 0.3 AML other m 2021-09-22T00:02:53.22
IV.VVLD.HHN. ML:1.2 0.00007654999999999999 0.2 AML other m 2021-09-22T00:02:53.82
IV.VVLD.HHE. ML:1.3 0.00010475 0.38 AML other m 2021-09-22T00:02:54.22
IV.FAGN.HHE. ML:1.8 0.000413 0.48 AML other m 2021-09-22T00:02:54.75
IV.T0110.HHN. ML:1.7 0.000188 0.24 AML other m 2021-09-22T00:02:54.83
IV.T0110.HHE. ML:1.6 0.0001725 0.44 AML other m 2021-09-22T00:02:55.35
IV.FIAM.HHE. ML:0.0 0.0000257 0.46 AML other m 2021-09-22T00:02:55.94
IV.INTR.HHN. ML:1.5 0.0001115 0.68 AML other m 2021-09-22T00:02:56.42
IV.INTR.HHE. ML:1.4 0.0000848 0.64 AML other m 2021-09-22T00:02:57.02
IV.FIAM.HHN. ML:0.0 0.00001650134 0.88 AML other m 2021-09-22T00:02:54.70
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