Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 07-05-2021 and time 00:22:09 (Italy) in region 3 km NE Balsorano (AQ)

A magnitude ML 1.2 earthquake occured in region: 3 km NE Balsorano (AQ), on

  • 06-05-2021 22:22:09 (UTC)
  • 07-05-2021 00:22:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8170, 13.5920 at 16 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Balsorano AQ 3 3569 3569
San Vincenzo Valle Roveto AQ 6 2347 5916
Villavallelonga AQ 6 919 6835
Collelongo AQ 8 1233 8068
Pescosolido FR 9 1555 9623
Sora FR 11 26144 35767
Campoli Appennino FR 11 1725 37492
Morino AQ 12 1448 38940
Civita d'Antino AQ 13 979 39919
Broccostella FR 13 2741 42660
Lecce nei Marsi AQ 15 1702 44362
Isola del Liri FR 15 11715 56077
Castelliri FR 16 3454 59531
Ortucchio AQ 16 1860 61391
Posta Fibreno FR 16 1139 62530
Trasacco AQ 16 6246 68776
Pescasseroli AQ 17 2203 70979
Civitella Roveto AQ 18 3268 74247
Gioia dei Marsi AQ 18 1989 76236
Fontechiari FR 18 1303 77539
Bisegna AQ 18 223 77762
Vicalvi FR 18 783 78545
Arpino FR 19 7262 85807
Alvito FR 19 2713 88520
Luco dei Marsi AQ 19 6079 94599
Collepardo FR 20 968 95567
Veroli FR 20 20560 116127

Municipalities with at least 50000 inhabitants

An earthquake occurred to
62 Km S of L'Aquila (69753 inhabitants)
68 Km E of Tivoli (56533 inhabitants)
69 Km E of Velletri (53303 inhabitants)
69 Km NE of Latina (125985 inhabitants)
74 Km E of Guidonia Montecelio (88673 inhabitants)
76 Km SW of Chieti (51815 inhabitants)
82 Km E of Aprilia (73446 inhabitants)
89 Km SW of Pescara (121014 inhabitants)
90 Km E of Anzio (54211 inhabitants)
90 Km SW of Montesilvano (53738 inhabitants)
92 Km E of Pomezia (62966 inhabitants)
92 Km E of Roma (2864731 inhabitants)
94 Km S of Teramo (54892 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 1.2 2021-05-06
22:22:09		 41.8167 13.5918 16 2021-12-29
11:12:04		 Bollettino Sismico Italiano INGV 91260211
Reviewed
Rev100 		ML 1.0 2021-05-06
22:22:09		 41.8157 13.5965 17 2021-05-06
23:02:51		 Sala Sismica INGV-Roma 89858521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-06 22:22:09 ± 0.06
Latitude 41.8167 ± 0.0027
Longitude 13.5918 ± 0.0036
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91260211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 349
Semi-minor axis of confidence ellipse (meter) 64
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 164
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43437
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 91260211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-14 08:56:50

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 89858521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-06 23:02:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
ST.CARE.EHZ. 2021-05-06T22:24:14.32 3.0 undecidable manual Sg 14.22 0
IV.CROCE.HHZ. 2021-05-06T22:24:08.55 3.0 undecidable manual Sn 2.15 0
IV.PLLN.EHZ. 2021-05-06T22:23:42.88 3.0 undecidable manual Sn 4.21 0
ST.VARA.EHZ. 2021-05-06T22:23:40.45 3.0 undecidable manual Sn -5.64 0
IV.HPAC.HHZ. 2021-05-06T22:23:30.16 3.0 undecidable manual Pg 21.42 0
IV.SEI.HHZ. 2021-05-06T22:23:08.45 3.0 undecidable manual Sg 0.22 0
GU.CARD.HHZ. 2021-05-06T22:23:07.40 3.0 undecidable manual Sn -9.5 0
AC.VLO.HHZ. 2021-05-06T22:23:00.68 3.0 undecidable manual Pn -0.63 0
GU.GRAM.HHZ. 2021-05-06T22:22:55.82 3.0 undecidable manual Pg 10.79 0
IV.MMUR.HNZ. 2021-05-06T22:22:47.17 3.0 undecidable manual Sg -0.08 0
IV.GIUL.HHE. 2021-05-06T22:22:22.17 0.3 undecidable manual S 224 40.0266 100 -0.14 71
IV.INTR.HHZ. 2021-05-06T22:22:20.53 0.3 undecidable manual S 50 33.6441 103 -0.12 73
IV.PTQR.HHE. 2021-05-06T22:22:19.08 0.6 undecidable manual S 325 27.75 107 -0.04 50
IV.RNI2.HNZ. 2021-05-06T22:22:18.09 0.6 undecidable manual P 105 48.0186 98 0.16 47
IV.GUAR.HHZ. 2021-05-06T22:22:18.08 0.3 undecidable manual S 264 23.2545 112 0.09 74
IV.CERA.HNZ. 2021-05-06T22:22:17.49 0.3 undecidable manual P 124 42.8238 99 0.35 68
IV.T0110.HHN. 2021-05-06T22:22:17.96 0.3 undecidable manual P 18 48.2184 98 0 72
IT.OPI.HGZ. 2021-05-06T22:22:17.19 0.3 undecidable manual S 103 20.2686 117 -0.07 75
IV.CSP1.EHZ. 2021-05-06T22:22:17.82 3.0 negative manual Pg -0.44 0
IV.BSSO.HHZ. 2021-05-06T22:22:16.57 3.0 negative manual Pn -0.01 0
IV.LRP.EHZ. 2021-05-06T22:22:16.80 0.6 undecidable manual S 181 18.87 119 -0.13 49
IV.GIUL.HHE. 2021-05-06T22:22:16.58 0.3 undecidable manual P 224 40.0266 100 -0.13 71
IV.POFI.HHZ. 2021-05-06T22:22:15.93 0.3 undecidable manual S 138 14.874 128 -0.11 75
IV.INTR.HHZ. 2021-05-06T22:22:15.49 0.3 undecidable manual P 50 33.6441 103 -0.26 71
IV.GUAR.HHZ. 2021-05-06T22:22:14.19 0.3 undecidable manual P 264 23.2545 112 -0.03 75
IV.PTQR.HHE. 2021-05-06T22:22:14.86 0.3 undecidable manual P 325 27.75 107 0 75
IV.VVLD.HHZ. 2021-05-06T22:22:14.61 0.3 undecidable manual S 24 6.3936 154 0.01 78
IT.OPI.HGZ. 2021-05-06T22:22:13.65 0.1 undecidable manual P 103 20.2686 117 -0.14 99
IV.POFI.HHZ. 2021-05-06T22:22:13.26 0.1 undecidable manual P 138 14.874 128 0.17 99
IV.LRP.EHZ. 2021-05-06T22:22:13.68 0.1 undecidable manual P 181 18.87 119 0.08 100
IV.VVLD.HHZ. 2021-05-06T22:22:12.43 0.1 positive manual P 24 6.3936 154 0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHE. ML:1.2 0.00017749999999999998 0.16 AML other m 2021-05-06T22:22:14.88
IV.VVLD.HHN. ML:1.1 0.000131 0.16 AML other m 2021-05-06T22:22:14.83
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