Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 30-09-2021 and time 08:09:26 (Italy) in region 2 km E Borbona (RI)

A magnitude ML 1.4 earthquake occured in region: 2 km E Borbona (RI), on

  • 30-09-2021 06:09:26 (UTC)
  • 30-09-2021 08:09:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5100, 13.1560 at 15 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
Borbona RI 2 617 617
Posta RI 5 694 1311
Montereale AQ 8 2581 3892
Cagnano Amiterno AQ 8 1369 5261
Micigliano RI 10 127 5388
Antrodoco RI 12 2588 7976
Capitignano AQ 12 665 8641
Cittareale RI 12 482 9123
Barete AQ 12 737 9860
Borgo Velino RI 14 972 10832
Pizzoli AQ 14 4326 15158
Castel Sant'Angelo RI 16 1308 16466
Leonessa RI 17 2435 18901
Amatrice RI 17 2657 21558
Scoppito AQ 17 3727 25285
Campotosto AQ 18 542 25827

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of L'Aquila (69753 inhabitants)
42 Km E of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
67 Km NE of Guidonia Montecelio (88673 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
85 Km W of Chieti (51815 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
87 Km W of Pescara (121014 inhabitants)
88 Km NE of Roma (2864731 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
97 Km NE of Velletri (53303 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 1.4 2021-09-30
06:09:26		 42.5098 13.156 15 2022-03-30
13:04:10		 Bollettino Sismico Italiano INGV 96341961
Reviewed
Rev100 		ML 1.3 2021-09-30
06:09:27		 42.5217 13.1438 11 2021-09-30
06:24:00		 Sala Sismica INGV-Roma 96053031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-30 06:09:26 ± 0.07
Latitude 42.5098 ± 0.0027
Longitude 13.1560 ± 0.0037
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96341961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 316
Semi-minor axis of confidence ellipse (meter) 89
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52161
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 96341961
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-08 07:14:42

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96053031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-30 06:24:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SARZ.HHZ. 2021-09-30T06:11:29.39 3.0 undecidable manual Sg 19.26 0
GU.MGRO.HHZ. 2021-09-30T06:11:26.42 3.0 undecidable manual Sn 8.9 0
IV.ZEN8.EHZ. 2021-09-30T06:11:14.58 3.0 undecidable manual Sg 11.25 0
OX.CIMO.HHZ. 2021-09-30T06:11:12.86 3.0 undecidable manual Sn 3.28 0
HL.VLS.HHZ. 2021-09-30T06:11:11.74 3.0 undecidable manual Pn 4.65 0
SL.LJU.BHZ. 2021-09-30T06:11:07.07 3.0 undecidable manual Sn 1.81 0
IV.HPAC.HHZ. 2021-09-30T06:11:06.17 3.0 undecidable manual Pg 15.55 0
MN.TRI.HHZ. 2021-09-30T06:11:01.72 3.0 undecidable manual Sg 7.09 0
IV.CAVE.HHZ. 2021-09-30T06:10:52.53 3.0 undecidable manual Sg 7.72 0
IV.MSRU.HHZ. 2021-09-30T06:10:42.77 3.0 positive manual Pg 10.9 0
IV.ICAI.EHZ. 2021-09-30T06:10:27.17 3.0 undecidable manual Sg 9.94 0
GU.EQUI.HHZ. 2021-09-30T06:10:19.89 3.0 positive manual Pg 11.29 0
IV.TDS.HHZ. 2021-09-30T06:10:19.68 3.0 negative manual Pn -0.26 0
MN.TRI.HHZ. 2021-09-30T06:10:18.18 3.0 negative manual Pn 2.76 0
IV.TST02.HHZ. 2021-09-30T06:09:57.83 3.0 undecidable manual S -0.02 0
IV.LPEL.HHZ. 2021-09-30T06:09:52.80 3.0 undecidable manual S -1.11 0
IV.PP3.EHZ. 2021-09-30T06:09:42.76 3.0 positive manual P -1 0
IV.MMO1.EHN. 2021-09-30T06:09:41.44 0.6 undecidable manual S 18 45.4212 98 0.25 45
IV.TERO.HHN. 2021-09-30T06:09:39.37 0.3 undecidable manual S 71 38.628 99 -0.04 72
IV.MTRA.EHE. 2021-09-30T06:09:38.02 0.3 undecidable manual S 36 33.6441 101 -0.08 72
IV.NRCA.HHZ. 2021-09-30T06:09:38.75 0.3 undecidable manual S 355 36.0417 100 0.02 73
IV.GIGS.HHN. 2021-09-30T06:09:38.19 0.3 undecidable manual S 100 34.6431 101 -0.17 71
IV.ARRO.EHZ. 2021-09-30T06:09:37.67 0.6 undecidable manual S 284 32.8449 102 -0.21 47
IV.MOMA.HHZ. 2021-09-30T06:09:36.64 0.6 undecidable manual P 304 57.8976 95 -0.27 44
IV.GAVE.EHN. 2021-09-30T06:09:36.81 0.6 undecidable manual S 313 29.4483 104 -0.18 47
IV.FIAM.HNZ. 2021-09-30T06:09:36.33 0.3 undecidable manual S 187 27.0507 106 -0.04 73
IV.TERO.HHN. 2021-09-30T06:09:34.03 0.3 undecidable manual P 71 38.628 99 0.06 72
IV.MMO1.EHN. 2021-09-30T06:09:34.65 0.1 undecidable manual P 18 45.4212 98 -0.34 89
IV.CAMP.HHZ. 2021-09-30T06:09:34.80 0.6 undecidable manual S 82 20.868 113 -0.03 50
IV.SMA1.EHZ. 2021-09-30T06:09:34.85 0.3 undecidable manual S 48 19.869 115 0.28 71
IV.T1299.EHZ. 2021-09-30T06:09:33.82 0.6 undecidable manual S 37 17.1717 120 -0.13 49
IV.GIGS.HHN. 2021-09-30T06:09:33.13 0.3 undecidable manual P 100 34.6431 101 -0.23 70
IV.ARRO.EHZ. 2021-09-30T06:09:33.27 0.1 undecidable manual P 284 32.8449 102 0.19 94
IV.MTRA.EHE. 2021-09-30T06:09:33.11 0.1 undecidable manual P 36 33.6441 101 -0.11 96
IV.LNSS.HHZ. 2021-09-30T06:09:33.20 0.1 undecidable manual S 318 13.9749 128 -0.04 75
IV.NRCA.HHZ. 2021-09-30T06:09:33.70 0.3 undecidable manual P 355 36.0417 100 0.12 71
IV.FIAM.HNZ. 2021-09-30T06:09:32.38 0.3 undecidable manual P 187 27.0507 106 0.16 72
IV.GAVE.EHN. 2021-09-30T06:09:32.58 0.6 undecidable manual P 313 29.4483 104 0 49
IV.SMA1.EHZ. 2021-09-30T06:09:31.36 0.3 undecidable manual P 48 19.869 115 0.18 72
IV.RM33.EHZ. 2021-09-30T06:09:31.46 0.1 undecidable manual S 91 4.7952 159 -0.29 96
IV.CAMP.HHZ. 2021-09-30T06:09:31.50 0.1 undecidable manual P 82 20.868 113 0.17 96
IV.LNSS.HHZ. 2021-09-30T06:09:30.65 0.1 undecidable manual P 318 13.9749 128 0.24 96
IV.T1299.EHZ. 2021-09-30T06:09:30.85 0.1 undecidable manual P 37 17.1717 120 0.03 100
IV.RM33.EHZ. 2021-09-30T06:09:29.72 0.1 undecidable manual P 91 4.7952 159 0.17 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.HNN. ML:1.6 0.0003875 0.26 AML other m 2021-09-30T06:09:31.69
IV.RM33.EHN. ML:1.5 0.000378 0.24 AML other m 2021-09-30T06:09:31.70
IV.RM33.HNE. ML:1.7 0.0006145 0.8 AML other m 2021-09-30T06:09:31.86
IV.RM33.EHE. ML:1.7 0.0006129999999999999 0.78 AML other m 2021-09-30T06:09:31.86
IV.LNSS.HHE. ML:1.2 0.00013269999999999997 0.86 AML other m 2021-09-30T06:09:33.99
IV.LNSS.HHN. ML:1.2 0.00012575 0.52 AML other m 2021-09-30T06:09:34.28
IV.SMA1.EHN. ML:1.1 0.00007664999999999999 0.34 AML other m 2021-09-30T06:09:35.47
IV.SMA1.EHE. ML:1.3 0.00013550000000000001 0.54 AML other m 2021-09-30T06:09:35.33
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