Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 27-07-2021 and time 16:42:22 (UTC) in region Montedinove (AP)

A magnitude ML 1.5 earthquake occured in region: Montedinove (AP), on

  • 27-07-2021 16:42:22 (UTC)
  • 27-07-2021 18:42:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9750, 13.5880 at 24 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
Montedinove AP 0 488 488
Montalto delle Marche AP 2 2122 2610
Rotella AP 3 906 3516
Castignano AP 5 2796 6312
Monte Rinaldo FM 6 379 6691
Montelparo FM 7 778 7469
Ortezzano FM 7 774 8243
Force AP 8 1354 9597
Cossignano AP 8 978 10575
Santa Vittoria in Matenano FM 9 1330 11905
Monte Vidon Combatte FM 9 433 12338
Offida AP 10 5058 17396
Monteleone di Fermo FM 10 395 17791
Montottone FM 10 979 18770
Carassai AP 10 1100 19870
Appignano del Tronto AP 11 1785 21655
Montefalcone Appennino FM 11 424 22079
Monsampietro Morico FM 11 659 22738
Petritoli FM 12 2335 25073
Smerillo FM 12 365 25438
Venarotta AP 13 2066 27504
Palmiano AP 13 196 27700
Ascoli Piceno AP 13 49407 77107
Monte Giberto FM 14 801 77908
Monte San Martino MC 14 765 78673
Belmonte Piceno FM 14 646 79319
Servigliano FM 14 2336 81655
Castorano AP 14 2380 84035
Comunanza AP 14 3166 87201
Ripatransone AP 15 4309 91510
Grottazzolina FM 15 3398 94908
Ponzano di Fermo FM 15 1674 96582
Roccafluvione AP 16 2010 98592
Castel di Lama AP 16 8634 107226
Montefiore dell'Aso AP 16 2123 109349
Penna San Giovanni MC 16 1108 110457
Monterubbiano FM 16 2230 112687
Colli del Tronto AP 17 3668 116355
Moresco FM 17 598 116953
Folignano AP 17 9241 126194
Falerone FM 18 3337 129531
Montegiorgio FM 18 6851 136382
Maltignano AP 18 2401 138783
Spinetoli AP 18 7215 145998
Magliano di Tenna FM 18 1452 147450
Monte Vidon Corrado FM 18 731 148181
Monsampolo del Tronto AP 19 4611 152792
Acquaviva Picena AP 19 3831 156623
Amandola FM 19 3629 160252
Massignano AP 19 1638 161890
Sant'Egidio alla Vibrata TE 20 9811 171701
Ancarano TE 20 1857 173558

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Teramo (54892 inhabitants)
69 Km NW of Montesilvano (53738 inhabitants)
71 Km N of L'Aquila (69753 inhabitants)
72 Km S of Ancona (100861 inhabitants)
72 Km E of Foligno (57155 inhabitants)
76 Km NW of Pescara (121014 inhabitants)
84 Km NW of Chieti (51815 inhabitants)
90 Km NE of Terni (111501 inhabitants)
99 Km E 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 1.5 2021-07-27
16:42:22		 42.9747 13.5882 24 2021-12-29
11:12:32		 Bollettino Sismico Italiano INGV 95789791
Reviewed
Rev100 		ML 1.9 2021-07-27
16:42:22		 42.9772 13.5917 24 2021-07-27
16:58:37		 Sala Sismica INGV-Roma 93275021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-27 16:42:22 ± 0.11
Latitude 42.9747 ± 0.0036
Longitude 13.5882 ± 0.0074
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95789791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 602
Semi-minor axis of confidence ellipse (meter) 123
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 245
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
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) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.72305
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 93275021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-27 16:58:37

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95789791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-23 15:58:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-07-27T16:42:40.65 0.3 undecidable manual S 315 55.6998 107 0.44 64
IV.MML1.EHZ. 2021-07-27T16:42:39.84 0.3 undecidable manual S 287 52.3032 108 0.49 64
IV.SMA1.EHZ. 2021-07-27T16:42:37.26 0.3 undecidable manual S 208 43.3233 112 0.15 69
IV.TERO.HHZ. 2021-07-27T16:42:36.39 0.3 undecidable manual S 178 39.0276 115 0.33 66
IV.ATCC.EHZ. 2021-07-27T16:42:36.30 0.6 undecidable manual P 287 80.2641 101 -0.07 44
IV.CSP1.EHZ. 2021-07-27T16:42:34.82 0.1 undecidable manual S 293 33.6441 119 0.04 96
IV.MC2.EHZ. 2021-07-27T16:42:34.97 0.3 undecidable manual S 258 33.1446 119 0.31 69
IV.MTRA.EHZ. 2021-07-27T16:42:33.44 0.1 undecidable manual S 213 28.749 124 -0.22 93
IV.MML1.EHZ. 2021-07-27T16:42:32.11 0.3 negative manual P 287 52.3032 108 -0.07 69
IV.CING.HNZ. 2021-07-27T16:42:32.56 1.0 undecidable manual P 325 54.6009 107 0.03 23
IV.EL6.EHZ. 2021-07-27T16:42:32.58 0.1 undecidable manual P 315 55.6998 107 -0.1 91
IV.CESI.HHE. 2021-07-27T16:42:32.67 0.6 undecidable manual P 274 55.5999 107 0.01 46
IV.SAP2.EHZ. 2021-07-27T16:42:31.94 0.6 undecidable manual S 312 20.4684 135 0.01 49
IV.SMA1.EHZ. 2021-07-27T16:42:30.88 0.3 undecidable manual P 208 43.3233 112 -0.01 71
IV.OFFI.HHZ. 2021-07-27T16:42:30.68 0.6 undecidable manual S 119 9.0798 157 0.48 44
IV.NRCA.HHZ. 2021-07-27T16:42:30.57 0.1 undecidable manual P 248 41.5251 113 -0.06 94
IV.TERO.HHZ. 2021-07-27T16:42:30.19 0.3 undecidable manual P 178 39.0276 115 -0.09 71
IV.FDMO.HHZ. 2021-07-27T16:42:30.44 0.3 negative manual P 280 41.2254 113 -0.14 69
IV.CSP1.EHZ. 2021-07-27T16:42:29.42 0.1 negative manual P 293 33.6441 119 -0.12 94
IV.MF5.EHZ. 2021-07-27T16:42:29.96 0.3 undecidable manual S 278 10.4784 154 -0.4 69
IV.MC2.EHZ. 2021-07-27T16:42:29.50 0.1 negative manual P 258 33.1446 119 0.03 96
IV.PF6.EHN. 2021-07-27T16:42:29.68 0.3 undecidable manual P 300 36.741 117 -0.27 68
IV.MTRA.EHZ. 2021-07-27T16:42:28.75 0.3 negative manual P 213 28.749 124 -0.14 71
IV.SAP2.EHZ. 2021-07-27T16:42:27.82 0.6 undecidable manual P 312 20.4684 135 -0.08 49
IV.OFFI.HHZ. 2021-07-27T16:42:27.07 0.3 undecidable manual P 119 9.0798 157 0.17 72
IV.MF5.EHZ. 2021-07-27T16:42:26.79 0.1 positive manual P 278 10.4784 154 -0.2 97
IV.MNTT.EHZ. 2021-07-27T16:42:26.86 0.1 positive manual P 4 9.6792 155 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.8 0.000235 0.26 AML other m 2021-07-27T16:42:33.77
IV.MTRA.EHN. ML:1.6 0.0001395 0.42 AML other m 2021-07-27T16:42:33.66
IV.SMA1.EHN. ML:1.3 0.000053150000000000004 0.28 AML other m 2021-07-27T16:42:37.79
IV.SMA1.EHE. ML:1.3 0.00005695 0.84 AML other m 2021-07-27T16:42:38.30
IV.FAGN.HHN. ML:1.7 0.00006435 0.26 AML other m 2021-07-27T16:42:39.24
IV.MF5.EHN. ML:0.0 0.0014500000000000001 0.2 AML other m 2021-07-27T16:42:30.19
IV.MF5.EHE. ML:0.0 0.0009085 0.44 AML other m 2021-07-27T16:42:30.31
IV.OFFI.HHN. ML:0.0 0.00039429005 0.2816 AML other m 2021-07-27T16:42:31.78
IV.OFFI.HHE. ML:0.0 0.0006292941 0.4736 AML other m 2021-07-27T16:42:31.69
IV.TERO.HHE. ML:1.4 0.000073103135 0.2048 AML other m 2021-07-27T16:42:37.11
IV.TERO.HHN. ML:1.2 0.00004879736 0.9472 AML other m 2021-07-27T16:42:37.72
IV.EL6.EHN. ML:1.6 0.00008385036 4.8384 AML other m 2021-07-27T16:42:42.66
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