Earthquake with magnitude of ML 1.5 on date 22-09-2021 and time 09:09:37 (Italy) in region 4 km W Avezzano (AQ)

A magnitude ML 1.5 earthquake occured in region: 4 km W Avezzano (AQ), on

  • 22-09-2021 07:09:37 (UTC)
  • 22-09-2021 09:09:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.022, 13.376 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Avezzano AQ 4 42515 42515
Castellafiume AQ 5 1106 43621
Scurcola Marsicana AQ 6 2824 46445
Capistrello AQ 6 5252 51697
Magliano de' Marsi AQ 8 3690 55387
Cappadocia AQ 8 528 55915
Canistro AQ 9 995 56910
Massa d'Albe AQ 10 1476 58386
Luco dei Marsi AQ 10 6079 64465
Tagliacozzo AQ 11 6889 71354
Civitella Roveto AQ 12 3268 74622
Filettino FR 15 565 75187
Trasacco AQ 15 6246 81433
Celano AQ 16 11017 92450
Vallepietra RM 16 283 92733
Sante Marie AQ 17 1166 93899
Civita d'Antino AQ 17 979 94878
Ovindoli AQ 17 1227 96105
Morino AQ 19 1448 97553
Aielli AQ 19 1475 99028
Cerchio AQ 19 1635 100663

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km S of L'Aquila (69753 inhabitants)
48 Km E of Tivoli (56533 inhabitants)
54 Km E of Guidonia Montecelio (88673 inhabitants)
62 Km NE of Velletri (53303 inhabitants)
73 Km NE of Latina (125985 inhabitants)
75 Km SW of Chieti (51815 inhabitants)
75 Km E of Roma (2864731 inhabitants)
76 Km SW of Teramo (54892 inhabitants)
77 Km NE of Aprilia (73446 inhabitants)
82 Km E of Pomezia (62966 inhabitants)
84 Km SW of Montesilvano (53738 inhabitants)
85 Km SE of Terni (111501 inhabitants)
85 Km SW of Pescara (121014 inhabitants)
89 Km NE of Anzio (54211 inhabitants)
98 Km E of Fiumicino (78395 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2021-09-22
07:09:37
42.0218 13.3763 11 2021-09-22
07:39:58
Sala Sismica INGV-Roma 95727591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 07:09:37 ± 0.22
Latitude 42.0218 ± 0.0099
Longitude 13.3763 ± 0.0145
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95727591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1169
Semi-minor axis of confidence ellipse (meter) 999
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 316
Circular confidence region, given by single value of horizontal uncertainty (meter) 1170
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 255
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.59895
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 95727591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 07:39:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ECTS.HHZ. 2021-09-22T07:10:24.30 3.0 undecidable manual Pn -9.15 0
IV.MBFT.HHZ. 2021-09-22T07:10:17.97 3.0 undecidable manual Pn -7.27 0
CR.STON.BHZ. 2021-09-22T07:10:06.90 3.0 positive manual Pg 7.93 0
SL.LJU.BHZ. 2021-09-22T07:10:02.02 3.0 undecidable manual Sg 5.84 0
IV.MNTT.EHZ. 2021-09-22T07:09:54.10 3.0 undecidable manual Sn -9.99 0
IV.INTR.HHZ. 2021-09-22T07:09:52.22 0.3 undecidable manual S 91 0.3921 90 0.37 67
IV.POFI.HHZ. 2021-09-22T07:09:52.13 0.3 undecidable manual S 141 0.3939 90 0.25 68
IV.LPEL.HHZ. 2021-09-22T07:09:49.34 0.1 undecidable manual P 87 0.5989 90 -0.1 89
IV.VVLD.HHZ. 2021-09-22T07:09:47.23 0.3 undecidable manual S 130 0.2383 91 -0.05 73
IV.GUAR.HHZ. 2021-09-22T07:09:47.28 0.3 undecidable manual S 192 0.232 91 0.18 70
IV.POFI.HHZ. 2021-09-22T07:09:45.12 0.3 undecidable manual P 141 0.3939 90 -0.8 57
IV.INTR.HHZ. 2021-09-22T07:09:45.93 0.3 undecidable manual P 91 0.3921 90 0.03 71
IV.GUAR.HHZ. 2021-09-22T07:09:43.26 0.1 undecidable manual P 192 0.232 91 0.1 96
IV.VVLD.HHZ. 2021-09-22T07:09:42.96 0.1 undecidable manual P 130 0.2383 91 -0.3 92
IV.PTQR.HHZ. 2021-09-22T07:09:41.81 0.3 undecidable manual S 90 0.018 167 0.07 76
IV.PTQR.HHZ. 2021-09-22T07:09:40.18 0.1 undecidable manual P 90 0.018 167 0.12 100
IV.AGLI.HHZ. 2021-09-22T07:09:35.09 3.0 positive manual Pn -5.12 0
GU.RNCA.HHZ. 2021-09-22T07:09:19.73 3.0 undecidable manual S -1.83 0
IV.BRSN.EHZ. 2021-09-22T07:09:19.38 3.0 undecidable manual S -4.9 0
IV.SARZ.HHZ. 2021-09-22T07:09:17.44 3.0 undecidable manual S 0.62 0
IV.LMD.HHZ. 2021-09-22T07:09:14.80 3.0 undecidable manual S -9.41 0
GU.LSD.HHZ. 2021-09-22T07:09:13.37 3.0 positive manual Pn 0.48 0
IV.NARO.HHZ. 2021-09-22T07:09:12.77 3.0 undecidable manual Pg 0.99 0
GU.MGRO.HHZ. 2021-09-22T07:09:07.50 3.0 negative manual Pn -5.04 0
ST.CARE.HNZ. 2021-09-22T07:08:53.77 3.0 undecidable manual P 0.01 0
IV.CRND.HNZ. 2021-09-22T07:08:49.04 3.0 undecidable manual P -6.49 0
IV.NDIM.HHZ. 2021-09-22T07:08:42.36 3.0 undecidable manual P -2.83 0
IV.CAVE.HHZ. 2021-09-22T07:08:40.10 3.0 undecidable manual P -6.19 0
IV.BAG8.EHZ. 2021-09-22T07:08:40.98 3.0 negative manual P -0.92 0
IV.ZEN8.EHZ. 2021-09-22T07:08:36.15 3.0 negative manual P -2.44 0
IV.SBPO.HNZ. 2021-09-22T07:08:35.43 3.0 negative manual P -6.85 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHE. ML:2.3 0.0035413675 0.1792 AML other m 2021-09-22T07:09:41.92
IV.PTQR.HHN. ML:2.1 0.0019632275 0.08 AML other m 2021-09-22T07:09:42.12
IV.GUAR.HHE. ML:1.7 0.000283 0.14 AML other m 2021-09-22T07:09:47.67
IV.GUAR.HHN. ML:1.6 0.00023526865 0.24 AML other m 2021-09-22T07:09:48.37
IV.VVLD.HHE. ML:1.4 0.00014963255 0.2592 AML other m 2021-09-22T07:09:48.82
IV.VVLD.HHN. ML:1.4 0.0001296221 0.2816 AML other m 2021-09-22T07:09:50.10
IV.INTR.HHE. ML:1.6 0.0001195 0.44 AML other m 2021-09-22T07:09:53.57
IV.INTR.HHN. ML:1.7 0.0001475 0.5 AML other m 2021-09-22T07:09:56.61
IV.LPEL.HHN. ML:1.4 4.9E-5 0.34 AML other m 2021-09-22T07:10:01.76
IV.LPEL.HHE. ML:1.6 6.44E-5 0.98 AML other m 2021-09-22T07:10:02.11
IV.VVLD.HNE. ML:1.5 0.00016166095 0.2176 AML other m 2021-09-22T07:09:47.75
IV.VVLD.HNN. ML:1.4 0.0001240264 0.2912 AML other m 2021-09-22T07:09:50.10
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