Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 20-08-2019 and time 13:04:54 (Italy) in region 5 km E Amatrice (RI)

A magnitude ML 1.0 earthquake occured in region: 5 km E Amatrice (RI), on

  • 20-08-2019 11:04:54 (UTC)
  • 20-08-2019 13:04:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6100, 13.3500 at 14 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
Campotosto AQ 6 542 3199
Capitignano AQ 11 665 3864
Accumoli RI 13 667 4531
Crognaleto TE 13 1297 5828
Montereale AQ 13 2581 8409
Cortino TE 13 656 9065
Cittareale RI 16 482 9547
Fano Adriano TE 17 296 9843
Rocca Santa Maria TE 17 537 10380
Barete AQ 18 737 11117
Acquasanta Terme AP 19 2916 14033
Valle Castellana TE 19 977 15010
Arquata del Tronto AP 19 1178 16188
Pietracamela TE 19 271 16459
Cagnano Amiterno AQ 20 1369 17828
Pizzoli AQ 20 4326 22154

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of L'Aquila (69753 inhabitants)
30 Km W of Teramo (54892 inhabitants)
58 Km E of Terni (111501 inhabitants)
65 Km SE of Foligno (57155 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
73 Km W of Pescara (121014 inhabitants)
73 Km W of Chieti (51815 inhabitants)
85 Km NE of Tivoli (56533 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SE of Perugia (166134 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 1.0 2019-08-20
11:04:54		 42.61 13.3502 14 2019-11-13
14:31:04		 Bollettino Sismico Italiano INGV 72948701
Reviewed
Rev100 		ML 1.1 2019-08-20
11:04:54		 42.6093 13.3498 13 2019-08-20
11:15:16		 Sala Sismica INGV-Roma 71647791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-20 11:04:54 ± 0.06
Latitude 42.6100 ± 0.0027
Longitude 13.3502 ± 0.0037
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 72948701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 289
Semi-minor axis of confidence ellipse (meter) 42
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 242
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 23
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) 0.34534
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 72948701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-01 09:40:54

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 71647791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-20 11:15:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2019-08-20T11:05:20.96 3.0 undecidable manual S -0.1 0
IV.MC2.EHZ. 2019-08-20T11:05:06.35 0.3 undecidable manual S 339 35.9418 96 0.24 70
IV.GAVE.EHN. 2019-08-20T11:05:06.48 0.3 undecidable manual S 284 38.3283 96 -0.26 70
IV.MMO1.EHN. 2019-08-20T11:05:05.20 0.3 undecidable manual S 357 32.1456 97 0.09 73
IV.NRCA.HHZ. 2019-08-20T11:05:04.68 0.3 undecidable manual S 322 31.3464 98 -0.23 71
IV.GIGS.HHZ. 2019-08-20T11:05:03.10 0.3 undecidable manual S 134 25.1526 101 -0.17 72
IV.TERO.HHZ. 2019-08-20T11:05:02.01 0.3 undecidable manual S 86 20.7681 106 -0.12 73
IV.GAVE.EHN. 2019-08-20T11:05:01.34 0.3 undecidable manual P 284 38.3283 96 -0.03 73
IV.MC2.EHZ. 2019-08-20T11:05:01.14 0.3 undecidable manual P 339 35.9418 96 0.13 72
IV.MTRA.EHZ. 2019-08-20T11:05:00.85 0.3 undecidable manual S 13 16.6722 113 -0.26 72
IV.MMO1.EHN. 2019-08-20T11:05:00.37 0.3 undecidable manual P 357 32.1456 97 -0.06 73
IV.NRCA.HHZ. 2019-08-20T11:05:00.34 0.1 undecidable manual P 322 31.3464 98 0.03 98
IV.RM33.EHZ. 2019-08-20T11:05:00.73 0.3 undecidable manual S 225 15.7731 116 -0.15 74
IV.LNSS.HHZ. 2019-08-20T11:04:59.41 0.3 undecidable manual P 268 25.3524 101 0.02 75
IV.CAMP.HHZ. 2019-08-20T11:04:59.46 0.3 undecidable manual S 150 9.4794 135 -0.06 76
IV.GIGS.HHZ. 2019-08-20T11:04:59.41 0.1 undecidable manual P 134 25.1526 101 0.04 99
IV.RM33.EHZ. 2019-08-20T11:04:58.11 0.1 undecidable manual P 225 15.7731 116 0.12 99
IV.SMA1.EHZ. 2019-08-20T11:04:58.48 0.3 undecidable manual S 332 2.5974 167 -0.13 76
IV.MTRA.EHZ. 2019-08-20T11:04:58.20 0.3 undecidable manual P 13 16.6722 113 0.08 75
IV.T1299.HNZ. 2019-08-20T11:04:58.88 0.3 undecidable manual S 296 6.1938 149 -0.09 76
IV.TERO.HHZ. 2019-08-20T11:04:58.79 1.0 undecidable manual P 86 20.7681 106 0.08 25
IV.T1299.HNZ. 2019-08-20T11:04:57.11 0.6 undecidable manual P 296 6.1938 149 0.23 49
IV.CAMP.HHZ. 2019-08-20T11:04:57.45 0.1 undecidable manual P 150 9.4794 135 0.25 98
IV.SMA1.EHZ. 2019-08-20T11:04:56.86 0.1 undecidable manual P 332 2.5974 167 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.1 0.000155160405 0.1152 AML other m 2019-08-20T11:04:58.91
IV.SMA1.EHE. ML:1.0 0.00012767924999999999 0.1024 AML other m 2019-08-20T11:04:59.18
IV.CAMP.HHN. ML:0.7 0.000051861025000000005 0.16 AML other m 2019-08-20T11:04:59.63
IV.CAMP.HHE. ML:0.4 0.00002965702 0.3008 AML other m 2019-08-20T11:04:59.74
IV.RM33.HNN. ML:1.2 0.00013077108 0.608 AML other m 2019-08-20T11:05:00.81
IV.RM33.EHN. ML:1.0 0.00007772647 0.1216 AML other m 2019-08-20T11:05:00.99
IV.RM33.HNE. ML:1.0 0.000092451495 0.2816 AML other m 2019-08-20T11:05:01.28
IV.RM33.EHE. ML:0.9 0.00006714242 0.2048 AML other m 2019-08-20T11:05:01.77
IV.TERO.HHE. ML:0.8 0.000041854459999999994 0.16 AML other m 2019-08-20T11:05:02.12
IV.TERO.HHN. ML:0.9 0.00005190182 0.0576 AML other m 2019-08-20T11:05:02.32
IV.TERO.HNE. ML:1.8 0.00044684894999999996 1.312 AML other m 2019-08-20T11:05:03.99
IV.TERO.HNN. ML:1.0 0.0000605825605 1.4176 AML other m 2019-08-20T11:05:07.92
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