Earthquake with magnitude of ML 1.3 on date 20-09-2021 and time 13:17:53 (Italy) in region 2 km S Massa d'Albe (AQ)

A magnitude ML 1.3 earthquake occured in region: 2 km S Massa d'Albe (AQ), on

  • 20-09-2021 11:17:53 (UTC)
  • 20-09-2021 13:17:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.0920, 13.3990 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.

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 2 1476 1476
Magliano de' Marsi AQ 3 3690 5166
Scurcola Marsicana AQ 6 2824 7990
Avezzano AQ 7 42515 50505
Ovindoli AQ 11 1227 51732
Tagliacozzo AQ 12 6889 58621
Celano AQ 12 11017 69638
Castellafiume AQ 13 1106 70744
Cappadocia AQ 14 528 71272
Capistrello AQ 14 5252 76524
Luco dei Marsi AQ 16 6079 82603
Aielli AQ 16 1475 84078
Sante Marie AQ 16 1166 85244
Rocca di Mezzo AQ 16 1526 86770
Canistro AQ 17 995 87765
Cerchio AQ 17 1635 89400
Rocca di Cambio AQ 18 533 89933
Borgorose RI 18 4591 94524
Trasacco AQ 19 6246 100770
Collarmele AQ 19 894 101664
Civitella Roveto AQ 20 3268 104932

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km S of L'Aquila (69753 inhabitants)
52 Km E of Tivoli (56533 inhabitants)
56 Km E of Guidonia Montecelio (88673 inhabitants)
68 Km SW of Teramo (54892 inhabitants)
68 Km NE of Velletri (53303 inhabitants)
70 Km W of Chieti (51815 inhabitants)
78 Km SW of Montesilvano (53738 inhabitants)
79 Km E of Roma (2864731 inhabitants)
79 Km SW of Pescara (121014 inhabitants)
81 Km NE of Latina (125985 inhabitants)
81 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 1.3 2021-09-20
11:17:53
42.0922 13.3992 10 2022-03-30
13:04:29
Bollettino Sismico Italiano INGV 99700061
Reviewed
Rev100
ML 1.5 2021-09-20
11:17:53
42.0883 13.4115 8 2021-09-20
11:29:17
Sala Sismica INGV-Roma 95661751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-20 11:17:53 ± 0.13
Latitude 42.0922 ± 0.0081
Longitude 13.3992 ± 0.0097
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99700061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1027
Semi-minor axis of confidence ellipse (meter) 226
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 318
Circular confidence region, given by single value of horizontal uncertainty (meter) 1030.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.58366
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 95661751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-20 11:29:17

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 99700061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-12 14:56:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CADC.HNZ. 2021-09-20T11:19:42.66 3.0 undecidable manual Sg 12.01 0
IV.LPEL.HHZ. 2021-09-20T11:18:14.35 0.6 undecidable manual S 94 64.7907 50 0.43 43
IV.RCAV.EHE. 2021-09-20T11:18:09.50 0.6 undecidable manual S 234 46.2204 50 0.52 44
IV.INTR.HHZ. 2021-09-20T11:18:08.90 0.3 undecidable manual S 102 42.624 50 0.9 56
IV.CERT.HNN. 2021-09-20T11:18:06.40 0.3 undecidable manual S 245 37.9287 50 -0.35 69
IV.GUAR.HHE. 2021-09-20T11:18:05.18 0.3 undecidable manual S 192 33.8439 50 -0.47 68
IV.T0110.HHZ. 2021-09-20T11:18:05.99 0.3 undecidable manual S 64 34.5432 50 0.13 73
IV.LPEL.HHZ. 2021-09-20T11:18:04.89 0.1 undecidable manual P 94 64.7907 50 -0.54 84
IV.VVLD.HHZ. 2021-09-20T11:18:04.79 0.3 undecidable manual S 143 30.8469 50 -0.08 74
IV.RCAV.EHE. 2021-09-20T11:18:03.32 0.3 undecidable manual P 234 46.2204 50 0.75 60
IV.FAGN.HHZ. 2021-09-20T11:18:02.88 0.3 undecidable manual S 38 24.5532 111 -0.07 75
IV.GIGS.HHZ. 2021-09-20T11:18:02.49 1.0 undecidable manual P 20 42.5241 50 0.49 22
IV.CERT.HNN. 2021-09-20T11:18:01.28 0.6 undecidable manual P 245 37.9287 50 0 50
IV.INTR.HHZ. 2021-09-20T11:18:01.79 0.3 undecidable manual P 102 42.624 50 -0.22 71
IV.T0110.HHZ. 2021-09-20T11:18:00.71 0.1 undecidable manual P 64 34.5432 50 -0.06 99
IV.GUAR.HHE. 2021-09-20T11:18:00.77 0.3 undecidable manual P 192 33.8439 50 0.12 73
IV.VVLD.HHZ. 2021-09-20T11:17:59.55 0.3 undecidable manual P 143 30.8469 50 -0.65 64
IV.FAGN.HHZ. 2021-09-20T11:17:58.88 0.1 undecidable manual P 38 24.5532 111 -0.21 97
IV.PTQR.HHZ. 2021-09-20T11:17:58.18 0.3 undecidable manual S 179 7.7811 141 0.09 77
IV.PTQR.HHZ. 2021-09-20T11:17:56.50 0.1 undecidable manual P 179 7.7811 141 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHN. ML:1.4 0.000383 0.14 AML other m 2021-09-20T11:17:58.48
IV.PTQR.HHE. ML:1.6 0.0005635 0.18 AML other m 2021-09-20T11:17:58.57
IV.VVLD.HNN. ML:1.3 0.00010212203 1.3216 AML other m 2021-09-20T11:18:04.88
IV.VVLD.HNE. ML:1.2 0.00007747044999999999 0.2176 AML other m 2021-09-20T11:18:05.25
IV.VVLD.HHE. ML:1.0 0.000045266845 0.16 AML other m 2021-09-20T11:18:05.23
IV.FAGN.HHE. ML:1.6 0.00021521314999999998 0.256 AML other m 2021-09-20T11:18:06.42
IV.FAGN.HHN. ML:1.4 0.0001725 0.3 AML other m 2021-09-20T11:18:06.21
IV.VVLD.HHN. ML:1.0 0.000045123040000000004 0.1984 AML other m 2021-09-20T11:18:06.95
IV.T0110.HHN. ML:1.3 0.00008450129500000001 0.3584 AML other m 2021-09-20T11:18:07.28
IV.T0110.HHE. ML:1.3 0.000078008885 0.1792 AML other m 2021-09-20T11:18:08.27
IV.INTR.HHE. ML:1.3 0.000059800000000000003 0.6 AML other m 2021-09-20T11:18:09.35
IV.INTR.HNE. ML:1.3 0.00006814569500000001 0.2496 AML other m 2021-09-20T11:18:09.88
IV.INTR.HNN. ML:1.3 0.00006401468000000001 0.2432 AML other m 2021-09-20T11:18:09.75
IV.INTR.HHN. ML:1.3 0.000070703985 0.3008 AML other m 2021-09-20T11:18:11.10
IV.LPEL.HHN. ML:1.4 0.00004488182 0.3392 AML other m 2021-09-20T11:18:15.52
IV.LPEL.HHE. ML:1.3 0.0000336278655 0.3392 AML other m 2021-09-20T11:18:18.50
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