Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 30-09-2020 and time 11:22:30 (UTC) in region 5 km W Amatrice (RI)

A magnitude ML 1.4 earthquake occured in region: 5 km W Amatrice (RI), on

  • 30-09-2020 11:22:30 (UTC)
  • 30-09-2020 13:22:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6520, 13.2360 at 12 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
Amatrice RI 5 2657 2657
Accumoli RI 5 667 3324
Cittareale RI 7 482 3806
Montereale AQ 14 2581 6387
Arquata del Tronto AP 14 1178 7565
Campotosto AQ 15 542 8107
Capitignano AQ 16 665 8772
Borbona RI 18 617 9389
Posta RI 18 694 10083
Acquasanta Terme AP 19 2916 12999
Norcia PG 20 4957 17956
Cascia PG 20 3217 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NW of L'Aquila (69753 inhabitants)
38 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
83 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
84 Km NE of Tivoli (56533 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
96 Km E of Viterbo (67173 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 2020-09-30
11:22:30		 42.6518 13.2363 12 2021-02-26
14:56:12		 Bollettino Sismico Italiano INGV 85789961
Reviewed
Rev100 		ML 1.4 2020-09-30
11:22:30		 42.6577 13.2373 13 2020-09-30
11:26:13		 Sala Sismica INGV-Roma 83387061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-30 11:22:30 ± 0.05
Latitude 42.6518 ± 0.0027
Longitude 13.2363 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85789961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 417
Semi-minor axis of confidence ellipse (meter) 118
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.03777
Epicentral distance of station farthest from the epicenter (degree) 0.44067
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 85789961
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-28 11:53:47

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 83387061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-30 11:26:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-09-30T11:22:47.03 0.6 undecidable manual S 357 48.9177 92 0.64 40
IV.FDMO.HHZ. 2020-09-30T11:22:45.38 0.6 undecidable manual S 344 44.3223 92 0.19 46
IV.TERO.HHZ. 2020-09-30T11:22:41.14 0.6 undecidable manual S 96 30.1476 93 -0.26 47
IV.MC2.EHZ. 2020-09-30T11:22:41.54 0.6 undecidable manual S 352 29.0487 94 0.43 45
IV.MMO1.EHN. 2020-09-30T11:22:40.80 0.3 undecidable manual S 15 28.4493 94 -0.14 73
IV.GAVE.EHZ. 2020-09-30T11:22:40.61 0.6 undecidable manual S 279 28.2495 94 -0.29 45
IV.CSP1.EHZ. 2020-09-30T11:22:39.92 0.3 undecidable manual P 357 48.9177 92 0.08 70
IV.FDMO.HHZ. 2020-09-30T11:22:39.20 0.3 undecidable manual P 344 44.3223 92 0.06 71
IV.CAMP.HHZ. 2020-09-30T11:22:38.36 0.6 undecidable manual S 132 19.0698 99 -0.1 49
IV.NRCA.HHZ. 2020-09-30T11:22:38.77 0.6 undecidable manual S 334 22.4553 96 -0.59 43
IV.RM33.EHZ. 2020-09-30T11:22:37.71 0.6 undecidable manual S 186 15.9729 105 0.07 50
IV.MTRA.EHZ. 2020-09-30T11:22:37.63 0.6 undecidable manual S 48 17.4714 102 -0.41 47
IV.LNSS.HHZ. 2020-09-30T11:22:37.89 0.6 undecidable manual S 251 16.872 103 0 49
IV.GAVE.EHZ. 2020-09-30T11:22:36.48 0.1 undecidable manual P 279 28.2495 94 -0.19 94
IV.MC2.EHZ. 2020-09-30T11:22:36.97 0.3 undecidable manual P 352 29.0487 94 0.18 71
IV.TERO.HHZ. 2020-09-30T11:22:36.90 0.3 undecidable manual P 96 30.1476 93 -0.06 73
IV.MMO1.EHN. 2020-09-30T11:22:36.68 0.3 undecidable manual P 15 28.4493 94 -0.01 74
IV.NRCA.HHZ. 2020-09-30T11:22:35.58 0.1 negative manual P 334 22.4553 96 -0.2 95
IV.SMA1.EHZ. 2020-09-30T11:22:35.91 0.6 undecidable manual S 106 8.3805 134 0.02 50
IV.CAMP.HHZ. 2020-09-30T11:22:35.34 0.3 undecidable manual P 132 19.0698 99 0.08 74
IV.MTRA.EHZ. 2020-09-30T11:22:34.92 0.1 undecidable manual P 48 17.4714 102 -0.09 100
IV.T1299.HNN. 2020-09-30T11:22:34.96 0.3 undecidable manual S 118 4.1958 155 -0.28 74
IV.LNSS.HHZ. 2020-09-30T11:22:34.93 0.1 positive manual P 251 16.872 103 0 99
IV.RM33.EHZ. 2020-09-30T11:22:34.95 0.1 undecidable manual P 186 15.9729 105 0.16 98
IV.SMA1.EHZ. 2020-09-30T11:22:34.00 0.1 positive manual P 106 8.3805 134 0.22 96
IV.T1299.HNN. 2020-09-30T11:22:33.49 0.1 undecidable manual P 118 4.1958 155 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.7 0.000689 0.3 AML other m 2020-09-30T11:22:36.35
IV.SMA1.EHN. ML:1.5 0.0003865 0.4 AML other m 2020-09-30T11:22:36.41
IV.MTRA.EHN. ML:1.6 0.0003135 0.1 AML other m 2020-09-30T11:22:37.72
IV.RM33.EHN. ML:1.3 0.000177 0.24 AML other m 2020-09-30T11:22:37.85
IV.MTRA.EHE. ML:1.4 0.000217 0.26 AML other m 2020-09-30T11:22:37.88
IV.LNSS.HHN. ML:0.8 0.0000572 1.66 AML other m 2020-09-30T11:22:37.13
IV.RM33.EHE. ML:1.1 0.0001139 0.72 AML other m 2020-09-30T11:22:38.24
IV.CAMP.HHE. ML:0.5 0.000026049999999999996 1.24 AML other m 2020-09-30T11:22:39.62
IV.NRCA.HHN. ML:1.6 0.0002585 0.1 AML other m 2020-09-30T11:22:39.05
IV.NRCA.HHE. ML:1.7 0.000284 1.32 AML other m 2020-09-30T11:22:39.25
IV.LNSS.HHE. ML:1.0 0.00007515 0.38 AML other m 2020-09-30T11:22:39.31
IV.TERO.HHN. ML:1.5 0.0001385 0.06 AML other m 2020-09-30T11:22:41.20
IV.TERO.HHE. ML:1.3 0.0000903 0.06 AML other m 2020-09-30T11:22:41.19
IV.CAMP.HHN. ML:0.4 0.0000216 0.36 AML other m 2020-09-30T11:22:48.59
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