Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-07-2020 and time 11:20:48 (Italy) in region 5 km SW Amatrice (RI)

A magnitude ML 1.5 earthquake occured in region: 5 km SW Amatrice (RI), on

  • 21-07-2020 09:20:48 (UTC)
  • 21-07-2020 11:20:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5900, 13.2580 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.

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
Amatrice RI 5 2657 2657
Montereale AQ 7 2581 5238
Capitignano AQ 8 665 5903
Cittareale RI 9 482 6385
Campotosto AQ 10 542 6927
Accumoli RI 12 667 7594
Borbona RI 13 617 8211
Cagnano Amiterno AQ 15 1369 9580
Posta RI 15 694 10274
Barete AQ 15 737 11011
Pizzoli AQ 17 4326 15337
Crognaleto TE 19 1297 16634

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
74 Km W of Montesilvano (53738 inhabitants)
79 Km NE of Guidonia Montecelio (88673 inhabitants)
79 Km NE of Tivoli (56533 inhabitants)
79 Km W of Chieti (51815 inhabitants)
80 Km W of Pescara (121014 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
96 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 1.5 2020-07-21
09:20:48		 42.5897 13.2582 11 2020-11-19
12:37:00		 Bollettino Sismico Italiano INGV 82711981
Reviewed
Rev100 		ML 1.7 2020-07-21
09:20:48		 42.5817 13.2597 14 2020-07-21
09:28:25		 Sala Sismica INGV-Roma 81211061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-21 09:20:48 ± 0.06
Latitude 42.5897 ± 0.0045
Longitude 13.2582 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 82711981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 477
Semi-minor axis of confidence ellipse (meter) 439
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.54859
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 82711981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-07 12:51:12

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 81211061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-21 09:28:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-07-21T09:21:04.40 0.6 undecidable manual S 20 47.1195 90 1.19 33
IV.FIAM.HHZ. 2020-07-21T09:21:00.70 0.3 undecidable manual S 198 37.5291 90 0.05 74
IV.MMO1.EHZ. 2020-07-21T09:20:59.90 0.3 undecidable manual S 9 34.8429 90 -0.03 74
IV.GAVE.EHZ. 2020-07-21T09:20:59.00 0.3 undecidable manual S 291 31.8459 90 -0.12 74
IV.VCEL.EHZ. 2020-07-21T09:20:58.23 0.6 undecidable manual P 114 52.3032 90 0.57 43
IV.NRCA.HHZ. 2020-07-21T09:20:58.30 0.3 undecidable manual S 337 29.4483 90 -0.21 73
IV.MOMA.HHZ. 2020-07-21T09:20:58.61 0.6 undecidable manual P 293 60.8946 90 -0.38 44
IV.CSP1.EHZ. 2020-07-21T09:20:58.09 0.3 undecidable manual P 356 55.8996 90 -0.12 70
IV.MF5.EHZ. 2020-07-21T09:20:57.32 0.3 undecidable manual P 20 47.1195 90 0.46 67
IV.TERO.HHZ. 2020-07-21T09:20:57.70 0.3 undecidable manual S 82 28.4493 90 -0.54 67
IV.LNSS.HHZ. 2020-07-21T09:20:55.40 0.3 undecidable manual S 275 17.871 90 0 77
IV.FIAM.HHZ. 2020-07-21T09:20:55.40 0.3 undecidable manual P 198 37.5291 90 0.02 74
IV.ARRO.EHZ. 2020-07-21T09:20:55.73 0.3 undecidable manual P 269 40.2264 90 -0.07 73
IV.MC2.EHZ. 2020-07-21T09:20:55.33 0.6 undecidable manual P 351 36.1416 90 0.16 48
IV.NRCA.HHZ. 2020-07-21T09:20:54.05 0.3 undecidable manual P 337 29.4483 90 -0.09 74
IV.CAMP.HHZ. 2020-07-21T09:20:54.10 0.3 undecidable manual S 116 13.6752 94 -0.19 75
IV.MMO1.EHZ. 2020-07-21T09:20:54.95 0.3 undecidable manual P 9 34.8429 90 -0.01 75
IV.GIGS.HHN. 2020-07-21T09:20:54.01 0.3 undecidable manual P 120 29.8479 90 -0.19 73
IV.GAVE.EHZ. 2020-07-21T09:20:54.42 0.3 undecidable manual P 291 31.8459 90 -0.08 74
IV.SMA1.EHZ. 2020-07-21T09:20:53.00 0.3 undecidable manual S 54 7.7811 132 0.12 76
IV.TERO.HHZ. 2020-07-21T09:20:53.83 0.3 undecidable manual P 82 28.4493 90 -0.16 73
IV.RM33.EHZ. 2020-07-21T09:20:53.30 0.3 undecidable manual S 202 9.5793 122 0.02 78
IV.LNSS.HHZ. 2020-07-21T09:20:52.45 0.3 undecidable manual P 275 17.871 90 0.1 76
IV.MTRA.EHE. 2020-07-21T09:20:52.81 0.3 undecidable manual P 31 21.6672 90 -0.13 75
IV.SMA1.EHZ. 2020-07-21T09:20:51.23 0.1 undecidable manual P 54 7.7811 132 0.34 97
IV.CAMP.HHZ. 2020-07-21T09:20:51.80 0.3 undecidable manual P 116 13.6752 94 0.09 76
IV.T1299.HNN. 2020-07-21T09:20:51.67 0.3 undecidable manual S 22 5.2947 146 -0.78 64
IV.RM33.EHZ. 2020-07-21T09:20:51.30 0.3 undecidable manual P 202 9.5793 122 0.18 75
IV.T1299.HNN. 2020-07-21T09:20:50.87 0.1 undecidable manual P 22 5.2947 146 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:2.0 0.00136948115 0.2048 AML other m 2020-07-21T09:20:53.29
IV.SMA1.EHE. ML:2.2 0.002378093 0.16 AML other m 2020-07-21T09:20:53.40
IV.RM33.HNE. ML:1.9 0.00094944885 0.1408 AML other m 2020-07-21T09:20:53.59
IV.RM33.EHE. ML:1.9 0.0010225666 0.2624 AML other m 2020-07-21T09:20:53.59
IV.RM33.EHN. ML:1.8 0.00081457665 0.1792 AML other m 2020-07-21T09:20:53.61
IV.RM33.HNN. ML:1.8 0.000841117 0.1984 AML other m 2020-07-21T09:20:53.62
IV.CAMP.HHE. ML:0.9 0.00007877592999999999 0.2624 AML other m 2020-07-21T09:20:55.84
IV.CAMP.HHN. ML:1.0 0.00008772345 0.1792 AML other m 2020-07-21T09:20:54.32
IV.LNSS.HNN. ML:1.4 0.00019746606 0.2816 AML other m 2020-07-21T09:20:55.66
IV.LNSS.HHE. ML:1.7 0.00036904749999999996 0.1792 AML other m 2020-07-21T09:20:55.61
IV.LNSS.HHN. ML:1.4 0.0002231093 0.384 AML other m 2020-07-21T09:20:59.21
IV.LNSS.HNE. ML:1.6 0.00034024304999999996 0.1728 AML other m 2020-07-21T09:20:55.52
IV.TERO.HHN. ML:1.7 0.00026361595 0.0832 AML other m 2020-07-21T09:20:57.92
IV.TERO.HHE. ML:1.7 0.0002358061 0.1792 AML other m 2020-07-21T09:20:57.96
IV.TERO.HNE. ML:1.7 0.00023202525000000002 0.0704 AML other m 2020-07-21T09:20:57.96
IV.TERO.HNN. ML:1.6 0.00018956455 0.096 AML other m 2020-07-21T09:20:57.86
IV.NRCA.HHE. ML:1.6 0.0001996004 0.0832 AML other m 2020-07-21T09:20:58.94
IV.NRCA.HHN. ML:1.5 0.0001427371 0.0768 AML other m 2020-07-21T09:20:58.93
IV.NRCA.HNE. ML:1.6 0.00018126175 0.096 AML other m 2020-07-21T09:20:58.95
IV.NRCA.HNN. ML:1.4 0.00013433109599999998 0.0768 AML other m 2020-07-21T09:20:58.93
IV.GAVE.EHE. ML:1.6 0.00016950505 0.1792 AML other m 2020-07-21T09:20:59.62
IV.GAVE.EHN. ML:1.5 0.0001562498 0.2816 AML other m 2020-07-21T09:20:59.35
IV.GAVE.HNE. ML:1.6 0.00019838045 0.1856 AML other m 2020-07-21T09:20:59.62
IV.FIAM.HHN. ML:0.1 0.000006477555500000001 0.1408 AML other m 2020-07-21T09:21:01.60
IV.FIAM.HHE. ML:0.7 0.000018376145 0.2752 AML other m 2020-07-21T09:21:01.08
IV.ARRO.EHE. ML:1.1 0.00004112649 0.1408 AML other m 2020-07-21T09:21:01.72
IV.ARRO.EHN. ML:1.3 0.000063772 0.1408 AML other m 2020-07-21T09:21:02.17
IV.MF5.EHN. ML:1.5 0.00008490004 0.3968 AML other m 2020-07-21T09:21:04.64
IV.MF5.EHE. ML:1.2 0.000048844635 0.3648 AML other m 2020-07-21T09:21:04.79
IV.CSP1.EHE. ML:1.0 0.000022450590000000004 0.2368 AML other m 2020-07-21T09:21:08.20
IV.CSP1.EHN. ML:1.1 0.000030721909999999995 0.1984 AML other m 2020-07-21T09:21:08.86
IV.VCEL.EHE. ML:1.5 0.000078422645 0.2816 AML other m 2020-07-21T09:21:08.64
IV.VCEL.EHN. ML:1.6 0.00010506848499999999 0.16 AML other m 2020-07-21T09:21:07.93
IV.MOMA.HHN. ML:1.4 0.000051574634999999995 0.1856 AML other m 2020-07-21T09:21:09.36
IV.MOMA.HNE. ML:1.7 0.0001054792 0.4416 AML other m 2020-07-21T09:21:08.00
IV.MOMA.HHE. ML:1.5 0.000067530905 0.16 AML other m 2020-07-21T09:21:09.32
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