Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 06-04-2021 and time 03:20:34 (Italy) in region 5 km SW Amatrice (RI)

A magnitude ML 1.2 earthquake occured in region: 5 km SW Amatrice (RI), on

  • 06-04-2021 01:20:34 (UTC)
  • 06-04-2021 03:20:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5850, 13.2630 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.

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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 6 2657 2657
Montereale AQ 7 2581 5238
Capitignano AQ 8 665 5903
Cittareale RI 9 482 6385
Campotosto AQ 9 542 6927
Accumoli RI 12 667 7594
Borbona RI 13 617 8211
Cagnano Amiterno AQ 14 1369 9580
Barete AQ 15 737 10317
Posta RI 15 694 11011
Pizzoli AQ 17 4326 15337
Crognaleto TE 18 1297 16634

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
79 Km NE of Guidonia Montecelio (88673 inhabitants)
79 Km W of Chieti (51815 inhabitants)
79 Km NE of Tivoli (56533 inhabitants)
79 Km W of Pescara (121014 inhabitants)
92 Km SE of Perugia (166134 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
100 Km NE of Roma (2864731 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 2021-04-06
01:20:34		 42.5853 13.263 16 2021-07-12
16:55:08		 Bollettino Sismico Italiano INGV 89598521
Reviewed
Rev100 		ML 1.3 2021-04-06
01:20:34		 42.5812 13.2662 14 2021-04-06
01:26:49		 Sala Sismica INGV-Roma 88804671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-06 01:20:34 ± 0.12
Latitude 42.5853 ± 0.0054
Longitude 13.2630 ± 0.0049
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 89598521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 542
Semi-minor axis of confidence ellipse (meter) 290
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42718
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 88804671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-06 01:26:49

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 89598521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-29 15:44:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCEL.HHZ. 2021-04-06T01:22:19.06 3.0 undecidable manual Sg 16.209999 0
ST.CARE.EHZ. 2021-04-06T01:21:56.86 3.0 undecidable manual Sg 2.11 0
IV.CET2.HHZ. 2021-04-06T01:21:37.85 3.0 undecidable manual Pg 7.7 0
IV.MCEL.HHZ. 2021-04-06T01:21:11.45 3.0 undecidable manual Pn -8.41 0
IV.MSSA.HHZ. 2021-04-06T01:21:11.04 3.0 undecidable manual Pg 5.11 0
IV.PAOL.HHZ. 2021-04-06T01:21:09.51 3.0 undecidable manual Pg 4.26 0
MN.TRI.HHZ. 2021-04-06T01:20:57.68 3.0 negative manual Pg -2.18 0
IV.MF5.EHZ. 2021-04-06T01:20:50.99 0.6 undecidable manual S 20 47.4192 98 1.09 33
IV.MMO1.EHN. 2021-04-06T01:20:46.67 0.6 undecidable manual S 8 35.2425 102 -0.01 48
IV.NRCA.HHZ. 2021-04-06T01:20:45.14 0.6 undecidable manual S 336 30.0477 105 -0.21 47
IV.GAVE.EHN. 2021-04-06T01:20:45.80 0.3 undecidable manual S 292 32.3454 103 -0.13 72
IV.TERO.HHZ. 2021-04-06T01:20:44.44 0.6 undecidable manual S 81 28.1496 106 -0.41 45
IV.MF5.EHZ. 2021-04-06T01:20:43.82 0.1 undecidable manual P 20 47.4192 98 0.34 88
IV.MTRA.EHE. 2021-04-06T01:20:42.96 0.6 undecidable manual S 30 21.9669 113 -0.32 46
IV.LNSS.HHZ. 2021-04-06T01:20:42.38 0.3 undecidable manual S 276 18.2706 119 -0.03 75
IV.CAMP.HHE. 2021-04-06T01:20:41.20 0.6 undecidable manual S 115 13.1757 131 -0.08 49
IV.GAVE.EHN. 2021-04-06T01:20:41.13 0.3 undecidable manual P 292 32.3454 103 -0.05 73
IV.MMO1.EHN. 2021-04-06T01:20:41.51 0.3 undecidable manual P 8 35.2425 102 -0.11 71
IV.SMA1.EHZ. 2021-04-06T01:20:40.33 0.3 undecidable manual S 50 7.7811 148 -0.02 75
IV.TERO.HHZ. 2021-04-06T01:20:40.49 0.3 undecidable manual P 81 28.1496 106 -0.07 72
IV.RM33.EHZ. 2021-04-06T01:20:40.51 0.3 undecidable manual S 205 9.3795 143 -0.08 75
IV.NRCA.HHZ. 2021-04-06T01:20:40.76 0.1 undecidable manual P 336 30.0477 105 -0.09 96
IV.MTRA.EHE. 2021-04-06T01:20:39.53 0.1 undecidable manual P 30 21.9669 113 -0.12 97
IV.LNSS.HHZ. 2021-04-06T01:20:39.18 0.1 undecidable manual P 276 18.2706 119 0.03 99
IV.T1299.HNN. 2021-04-06T01:20:39.90 0.3 undecidable manual S 16 5.6943 156 -0.19 73
IV.CAMP.HHE. 2021-04-06T01:20:38.62 0.3 undecidable manual P 115 13.1757 131 0.12 74
IV.SMA1.EHZ. 2021-04-06T01:20:38.12 0.1 positive manual P 50 7.7811 148 0.16 98
IV.RM33.EHZ. 2021-04-06T01:20:38.25 0.1 undecidable manual P 205 9.3795 143 0.15 98
IV.NARO.HHZ. 2021-04-06T01:20:37.97 3.0 undecidable manual P 0
IV.NARO.HHZ. 2021-04-06T01:20:37.95 3.0 undecidable manual S -3.4 0
IV.T1299.HNN. 2021-04-06T01:20:37.90 0.1 undecidable manual P 16 5.6943 156 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.4 0.0002585 0.22 AML other m 2021-04-06T01:20:40.78
IV.SMA1.EHE. ML:1.5 0.00034750000000000004 0.16 AML other m 2021-04-06T01:20:40.68
IV.LNSS.HHN. ML:1.2 0.0001056 0.68 AML other m 2021-04-06T01:20:42.55
IV.LNSS.HHE. ML:1.3 0.000129 0.14 AML other m 2021-04-06T01:20:42.69
IV.TERO.HHN. ML:0.9 0.00003315 0.72 AML other m 2021-04-06T01:20:44.88
IV.TERO.HHE. ML:0.6 0.00002045 0.48 AML other m 2021-04-06T01:20:46.35
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