Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 13-10-2020 and time 17:36:46 (Italy) in region 2 km W Amatrice (RI)

A magnitude ML 1.1 earthquake occured in region: 2 km W Amatrice (RI), on

  • 13-10-2020 15:36:46 (UTC)
  • 13-10-2020 17:36:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6240, 13.2610 at 11 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 2 2657 2657
Accumoli RI 8 667 3324
Cittareale RI 8 482 3806
Montereale AQ 11 2581 6387
Campotosto AQ 12 542 6929
Capitignano AQ 12 665 7594
Borbona RI 16 617 8211
Arquata del Tronto AP 17 1178 9389
Posta RI 17 694 10083
Cagnano Amiterno AQ 19 1369 11452
Barete AQ 19 737 12189
Crognaleto TE 20 1297 13486

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
59 Km SE of Foligno (57155 inhabitants)
74 Km W of Montesilvano (53738 inhabitants)
80 Km W of Pescara (121014 inhabitants)
80 Km W of Chieti (51815 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
89 Km SE of Perugia (166134 inhabitants)
97 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 1.1 2020-10-13
15:36:46		 42.6242 13.2607 11 2021-02-26
14:56:01		 Bollettino Sismico Italiano INGV 84205171
Reviewed
Rev100 		ML 1.2 2020-10-13
15:36:46		 42.6242 13.2637 12 2020-10-13
15:43:27		 Sala Sismica INGV-Roma 83757981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-13 15:36:46 ± 0.04
Latitude 42.6242 ± 0.0027
Longitude 13.2607 ± 0.0024
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84205171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 304
Semi-minor axis of confidence ellipse (meter) 106
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 357
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.46945
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 83757981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-13 15:43:27

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 84205171
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-28 09:19:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-10-13T15:37:02.48 0.6 undecidable manual S 343 47.8188 90 0.33 45
IV.ARRO.EHZ. 2020-10-13T15:37:00.33 0.6 undecidable manual S 263 40.7259 90 0.08 48
IV.MC2.EHZ. 2020-10-13T15:36:58.06 0.3 undecidable manual S 350 32.3454 91 0.03 73
IV.GAVE.EHZ. 2020-10-13T15:36:57.52 0.3 undecidable manual S 284 30.8469 91 -0.09 72
IV.GIGS.HHZ. 2020-10-13T15:36:57.68 0.6 undecidable manual S 127 31.8459 91 -0.19 47
IV.MMO1.EHZ. 2020-10-13T15:36:57.69 0.3 undecidable manual S 10 30.9468 91 0.04 73
IV.NRCA.HHZ. 2020-10-13T15:36:56.08 0.3 undecidable manual S 333 26.1516 91 -0.27 70
IV.CSP1.EHZ. 2020-10-13T15:36:56.49 0.3 undecidable manual P 355 52.1034 90 0.12 69
IV.TERO.HHZ. 2020-10-13T15:36:56.51 0.3 undecidable manual S 90 28.0497 91 -0.35 69
IV.MF5.EHZ. 2020-10-13T15:36:55.41 0.3 undecidable manual P 22 43.4232 90 0.37 67
IV.FDMO.HHZ. 2020-10-13T15:36:55.80 0.1 undecidable manual P 343 47.8188 90 0.09 94
IV.ARRO.EHZ. 2020-10-13T15:36:54.45 0.3 undecidable manual P 263 40.7259 90 -0.17 70
IV.LNSS.HHZ. 2020-10-13T15:36:54.20 0.3 undecidable manual S 263 18.1707 93 -0.02 75
IV.GIGS.HHZ. 2020-10-13T15:36:53.57 0.3 undecidable manual P 127 31.8459 91 0.33 69
IV.MMO1.EHZ. 2020-10-13T15:36:53.12 0.1 undecidable manual P 10 30.9468 91 0 98
IV.CAMP.HHZ. 2020-10-13T15:36:53.31 0.3 undecidable manual S 129 15.5733 95 -0.23 72
IV.MC2.EHZ. 2020-10-13T15:36:53.28 0.1 undecidable manual P 350 32.3454 91 -0.05 97
IV.MTRA.HNZ. 2020-10-13T15:36:53.95 0.3 undecidable manual S 37 18.3705 92 -0.34 70
IV.GAVE.EHZ. 2020-10-13T15:36:52.94 0.1 undecidable manual P 284 30.8469 91 -0.15 95
IV.RM33.EHZ. 2020-10-13T15:36:52.84 0.3 undecidable manual S 196 13.3755 104 -0.11 74
IV.NRCA.HHZ. 2020-10-13T15:36:52.32 0.1 undecidable manual P 333 26.1516 91 -0.04 98
IV.TERO.HHZ. 2020-10-13T15:36:52.60 0.1 undecidable manual P 90 28.0497 91 -0.06 97
IV.MTRA.HNZ. 2020-10-13T15:36:51.19 0.1 undecidable manual P 37 18.3705 92 0.01 100
IV.LNSS.HHZ. 2020-10-13T15:36:51.22 0.1 undecidable manual P 263 18.1707 93 0.08 99
IV.SMA1.EHZ. 2020-10-13T15:36:51.47 0.3 undecidable manual S 83 6.0939 142 0.11 75
IV.RM33.EHZ. 2020-10-13T15:36:50.60 0.1 undecidable manual P 196 13.3755 104 0.2 97
IV.T1299.HNZ. 2020-10-13T15:36:50.56 0.3 undecidable manual S 58 2.0979 166 -0.33 73
IV.CAMP.HHZ. 2020-10-13T15:36:50.80 0.1 undecidable manual P 129 15.5733 95 0.06 100
IV.T1299.HNZ. 2020-10-13T15:36:49.38 0.1 undecidable manual P 58 2.0979 166 0.17 99
IV.SMA1.EHZ. 2020-10-13T15:36:49.77 0.1 undecidable manual P 83 6.0939 142 0.28 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.0 0.0000482 1.08 AML other m 2020-10-13T15:36:58.64
IV.RM33.EHE. ML:0.9 0.0001535 0.64 AML other m 2020-10-13T15:36:53.33
IV.LNSS.HHE. ML:1.1 0.00010300000000000001 0.82 AML other m 2020-10-13T15:36:54.96
IV.LNSS.HHN. ML:1.0 0.00009140000000000001 0.66 AML other m 2020-10-13T15:36:54.54
IV.TERO.HHE. ML:1.1 0.00006989999999999999 0.06 AML other m 2020-10-13T15:36:56.76
IV.TERO.HHN. ML:1.3 0.00009984999999999999 1.36 AML other m 2020-10-13T15:36:57.08
IV.GAVE.EHE. ML:1.2 0.00006775000000000001 1.38 AML other m 2020-10-13T15:36:58.28
IV.RM33.HNN. ML:1.1 0.000126859305 0.5248 AML other m 2020-10-13T15:36:53.31
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